Commit Graph

971151 Commits

Author SHA1 Message Date
Uwe Kleine-König
910990a607 amba: Fix resource leak for drivers without .remove
[ Upstream commit de5d7adb89367bbc87b4e5ce7afe7ae9bd86dc12 ]

Consider an amba driver with a .probe but without a .remove callback (e.g.
pl061_gpio_driver). The function amba_probe() is called to bind a device
and so dev_pm_domain_attach() and others are called. As there is no remove
callback amba_remove() isn't called at unbind time however and so calling
dev_pm_domain_detach() is missed and the pm domain keeps active.

To fix this always use the core driver callbacks and handle missing amba
callbacks there. For probe refuse registration as a driver without probe
doesn't make sense.

Fixes: 7cfe249475 ("ARM: AMBA: Add pclk support to AMBA bus infrastructure")
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20210126165835.687514-2-u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:38:02 +01:00
Roja Rani Yarubandi
426c560226 i2c: qcom-geni: Store DMA mapping data in geni_i2c_dev struct
[ Upstream commit 357ee8841d0b7bd822f25fc768afbc0c2ab7e47b ]

Store DMA mapping data in geni_i2c_dev struct to enhance DMA mapping
data scope. For example during shutdown callback to unmap DMA mapping,
this stored DMA mapping data can be used to call geni_se_tx_dma_unprep
and geni_se_rx_dma_unprep functions.

Add two helper functions geni_i2c_rx_msg_cleanup and
geni_i2c_tx_msg_cleanup to unwrap the things after rx/tx FIFO/DMA
transfers, so that the same can be used in geni_i2c_stop_xfer()
function during shutdown callback.

Signed-off-by: Roja Rani Yarubandi <rojay@codeaurora.org>
Reviewed-by: Akash Asthana <akashast@codeaurora.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:38:02 +01:00
Vladimir Murzin
e699cd1380 ARM: 9046/1: decompressor: Do not clear SCTLR.nTLSMD for ARMv7+ cores
[ Upstream commit 2acb909750431030b65a0a2a17fd8afcbd813a84 ]

It was observed that decompressor running on hardware implementing ARM v8.2
Load/Store Multiple Atomicity and Ordering Control (LSMAOC), say, as guest,
would stuck just after:

Uncompressing Linux... done, booting the kernel.

The reason is that it clears nTLSMD bit when disabling caches:

  nTLSMD, bit [3]

  When ARMv8.2-LSMAOC is implemented:

    No Trap Load Multiple and Store Multiple to
    Device-nGRE/Device-nGnRE/Device-nGnRnE memory.

    0b0 All memory accesses by A32 and T32 Load Multiple and Store
        Multiple at EL1 or EL0 that are marked at stage 1 as
        Device-nGRE/Device-nGnRE/Device-nGnRnE memory are trapped and
        generate a stage 1 Alignment fault.

    0b1 All memory accesses by A32 and T32 Load Multiple and Store
        Multiple at EL1 or EL0 that are marked at stage 1 as
        Device-nGRE/Device-nGnRE/Device-nGnRnE memory are not trapped.

  This bit is permitted to be cached in a TLB.

  This field resets to 1.

  Otherwise:

  Reserved, RES1

So as effect we start getting traps we are not quite ready for.

Looking into history it seems that mask used for SCTLR clear came from
the similar code for ARMv4, where bit[3] is the enable/disable bit for
the write buffer. That not applicable to ARMv7 and onwards, so retire
that bit from the masks.

Fixes: 7d09e85448 ("[ARM] 4393/2: ARMv7: Add uncompressing code for the new CPU Id format")
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:38:02 +01:00
Takeshi Saito
252425cb87 mmc: renesas_sdhi_internal_dmac: Fix DMA buffer alignment from 8 to 128-bytes
[ Upstream commit d7aefb2887601cf1fc3f86f55d43b2c9aece5e8f ]

According to the latest datasheet, the internal DMAC buffer alignment
R-Car Gen3 SDHI HW should be 128-bytes. So, fix it.

Signed-off-by: Takeshi Saito <takeshi.saito.xv@renesas.com>
[shimoda: revise commit description, rebase]
Fixes: 2a68ea7896 ("mmc: renesas-sdhi: add support for R-Car Gen3 SDHI DMAC")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/1608114572-1892-2-git-send-email-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:38:02 +01:00
Christophe JAILLET
d892fe653e mmc: usdhi6rol0: Fix a resource leak in the error handling path of the probe
[ Upstream commit 6052b3c370fb82dec28bcfff6d7ec0da84ac087a ]

A call to 'ausdhi6_dma_release()' to undo a previous call to
'usdhi6_dma_request()' is missing in the error handling path of the probe
function.

It is already present in the remove function.

Fixes: 75fa9ea6e3 ("mmc: add a driver for the Renesas usdhi6rol0 SD/SDIO host controller")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/20201217210922.165340-1-christophe.jaillet@wanadoo.fr
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:38:02 +01:00
Christophe JAILLET
2597563286 mmc: sdhci-sprd: Fix some resource leaks in the remove function
[ Upstream commit c9c256a8b0dc09c305c409d6264cc016af2ba38d ]

'sdhci_remove_host()' and 'sdhci_pltfm_free()' should be used in place of
'mmc_remove_host()' and 'mmc_free_host()'.

This avoids some resource leaks, is more in line with the error handling
path of the probe function, and is more consistent with other drivers.

Fixes: fb8bd90f83 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Orson Zhai <orson.zhai@gmail.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20201217204236.163446-1-christophe.jaillet@wanadoo.fr
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:38:02 +01:00
Christophe JAILLET
34251b8274 mmc: owl-mmc: Fix a resource leak in an error handling path and in the remove function
[ Upstream commit 5d15cbf63515c6183d2ed7c9dd0586b4db23ffb1 ]

'dma_request_chan()' calls should be balanced by a corresponding
'dma_release_channel()' call.

Add the missing call both in the error handling path of the probe function
and in the remove function.

Fixes: ff65ffe46d ("mmc: Add Actions Semi Owl SoCs SD/MMC driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/20201209194202.54099-1-christophe.jaillet@wanadoo.fr
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:38:02 +01:00
Pingfan Liu
99e7c8d157 powerpc/time: Enable sched clock for irqtime
[ Upstream commit b709e32ef570b8b91dfbcb63cffac4324c87799f ]

When CONFIG_IRQ_TIME_ACCOUNTING and CONFIG_VIRT_CPU_ACCOUNTING_GEN, powerpc
does not enable "sched_clock_irqtime" and can not utilize irq time
accounting.

Like x86, powerpc does not use the sched_clock_register() interface. So it
needs an dedicated call to enable_sched_clock_irqtime() to enable irq time
accounting.

Fixes: 518470fe96 ("powerpc: Add HAVE_IRQ_TIME_ACCOUNTING")
Signed-off-by: Pingfan Liu <kernelfans@gmail.com>
[mpe: Add fixes tag]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1603349479-26185-1-git-send-email-kernelfans@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:38:01 +01:00
Christophe Leroy
f6ba4a84b9 powerpc/47x: Disable 256k page size
[ Upstream commit 910a0cb6d259736a0c86e795d4c2f42af8d0d775 ]

PPC47x_TLBE_SIZE isn't defined for 256k pages, leading to a build
break if 256k pages is selected.

So change the kconfig so that 256k pages can't be selected for 47x.

Fixes: e7f75ad01d ("powerpc/47x: Base ppc476 support")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
[mpe: Expand change log to mention build break]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/2fed79b1154c872194f98bac4422c23918325e61.1611128938.git.christophe.leroy@csgroup.eu
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:38:01 +01:00
Cédric Le Goater
6b83da9b1e KVM: PPC: Make the VMX instruction emulation routines static
[ Upstream commit 9236f57a9e51c72ce426ccd2e53e123de7196a0f ]

These are only used locally. It fixes these W=1 compile errors :

../arch/powerpc/kvm/powerpc.c:1521:5: error: no previous prototype for ‘kvmppc_get_vmx_dword’ [-Werror=missing-prototypes]
 1521 | int kvmppc_get_vmx_dword(struct kvm_vcpu *vcpu, int index, u64 *val)
      |     ^~~~~~~~~~~~~~~~~~~~
../arch/powerpc/kvm/powerpc.c:1539:5: error: no previous prototype for ‘kvmppc_get_vmx_word’ [-Werror=missing-prototypes]
 1539 | int kvmppc_get_vmx_word(struct kvm_vcpu *vcpu, int index, u64 *val)
      |     ^~~~~~~~~~~~~~~~~~~
../arch/powerpc/kvm/powerpc.c:1557:5: error: no previous prototype for ‘kvmppc_get_vmx_hword’ [-Werror=missing-prototypes]
 1557 | int kvmppc_get_vmx_hword(struct kvm_vcpu *vcpu, int index, u64 *val)
      |     ^~~~~~~~~~~~~~~~~~~~
../arch/powerpc/kvm/powerpc.c:1575:5: error: no previous prototype for ‘kvmppc_get_vmx_byte’ [-Werror=missing-prototypes]
 1575 | int kvmppc_get_vmx_byte(struct kvm_vcpu *vcpu, int index, u64 *val)
      |     ^~~~~~~~~~~~~~~~~~~

Fixes: acc9eb9305 ("KVM: PPC: Reimplement LOAD_VMX/STORE_VMX instruction mmio emulation with analyse_instr() input")
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210104143206.695198-19-clg@kaod.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:38:01 +01:00
Shay Drory
69ca7a12b7 IB/umad: Return EPOLLERR in case of when device disassociated
[ Upstream commit def4cd43f522253645b72c97181399c241b54536 ]

Currently, polling a umad device will always works, even if the device was
disassociated. A disassociated device should immediately return EPOLLERR
from poll(). Otherwise userspace is endlessly hung on poll() with no idea
that the device has been removed from the system.

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Link: https://lore.kernel.org/r/20210125121339.837518-3-leon@kernel.org
Signed-off-by: Shay Drory <shayd@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:38:01 +01:00
Shay Drory
1598e9e00a IB/umad: Return EIO in case of when device disassociated
[ Upstream commit 4fc5461823c9cad547a9bdfbf17d13f0da0d6bb5 ]

MAD message received by the user has EINVAL error in all flows
including when the device is disassociated. That makes it impossible
for the applications to treat such flow differently.

Change it to return EIO, so the applications will be able to perform
disassociation recovery.

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Link: https://lore.kernel.org/r/20210125121339.837518-2-leon@kernel.org
Signed-off-by: Shay Drory <shayd@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:38:01 +01:00
Yong Wu
48e6713713 iommu: Switch gather->end to the inclusive end
[ Upstream commit 862c3715de8f3e5350489240c951d697f04bd8c9 ]

Currently gather->end is "unsigned long" which may be overflow in
arch32 in the corner case: 0xfff00000 + 0x100000(iova + size).
Although it doesn't affect the size(end - start), it affects the checking
"gather->end < end"

This patch changes this "end" to the real end address
(end = start + size - 1). Correspondingly, update the length to
"end - start + 1".

Fixes: a7d20dc19d ("iommu: Introduce struct iommu_iotlb_gather for batching TLB flushes")
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20210107122909.16317-5-yong.wu@mediatek.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:38:01 +01:00
Dan Carpenter
2dbc0ea1d1 scsi: lpfc: Fix ancient double free
[ Upstream commit 0be310979e5e1272d4c5b557642df4da4ce7eba4 ]

The "pmb" pointer is freed at the start of the function and then freed
again in the error handling code.

Link: https://lore.kernel.org/r/YA6E8rO51hE56SVw@mwanda
Fixes: 92d7f7b0cd ("[SCSI] lpfc: NPIV: add NPIV support on top of SLI-3")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:38:01 +01:00
Josh Poimboeuf
c41fc75add objtool: Fix ".cold" section suffix check for newer versions of GCC
[ Upstream commit 34ca59e109bdf69704c33b8eeffaa4c9f71076e5 ]

With my version of GCC 9.3.1 the ".cold" subfunctions no longer have a
numbered suffix, so the trailing period is no longer there.

Presumably this doesn't yet trigger a user-visible bug since most of the
subfunction detection logic is duplicated.   I only found it when
testing vmlinux.o validation.

Fixes: 54262aa283 ("objtool: Fix sibling call detection")
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/ca0b5a57f08a2fbb48538dd915cc253b5edabb40.1611263461.git.jpoimboe@redhat.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:38:00 +01:00
Josh Poimboeuf
7631376b2d objtool: Fix retpoline detection in asm code
[ Upstream commit 1f9a1b74942485a0a29e7c4a9a9f2fe8aea17766 ]

The JMP_NOSPEC macro branches to __x86_retpoline_*() rather than the
__x86_indirect_thunk_*() wrappers used by C code.  Detect jumps to
__x86_retpoline_*() as retpoline dynamic jumps.

Presumably this doesn't trigger a user-visible bug.  I only found it
when testing vmlinux.o validation.

Fixes: 39b735332c ("objtool: Detect jumps to retpoline thunks")
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/31f5833e2e4f01e3d755889ac77e3661e906c09f.1611263461.git.jpoimboe@redhat.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:38:00 +01:00
Josh Poimboeuf
9e06f36658 objtool: Fix error handling for STD/CLD warnings
[ Upstream commit 6f567c9300a5ebd7b18c26dda1c8d6ffbdd0debd ]

Actually return an error (and display a backtrace, if requested) for
directional bit warnings.

Fixes: 2f0f9e9ad7 ("objtool: Add Direction Flag validation")
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/dc70f2adbc72f09526f7cab5b6feb8bf7f6c5ad4.1611263461.git.jpoimboe@redhat.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:38:00 +01:00
Geert Uytterhoeven
994334fa2a auxdisplay: ht16k33: Fix refresh rate handling
[ Upstream commit e89b0a426721a8ca5971bc8d70aa5ea35c020f90 ]

Drop the call to msecs_to_jiffies(), as "HZ / fbdev->refresh_rate" is
already the number of jiffies to wait.

Fixes: 8992da44c6 ("auxdisplay: ht16k33: Driver for LED controller")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:38:00 +01:00
Andy Shevchenko
56cc83dfd3 watchdog: intel-mid_wdt: Postpone IRQ handler registration till SCU is ready
[ Upstream commit f285c9532b5bd3de7e37a6203318437cab79bd9a ]

When SCU is not ready and CONFIG_DEBUG_SHIRQ=y we got deferred probe followed
by fired test IRQ which immediately makes kernel panic. Fix this by delaying
IRQ handler registration till SCU is ready.

Fixes: 80ae679b8f ("watchdog: intel-mid_wdt: Convert to use new SCU IPC API")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:38:00 +01:00
Pan Bian
ffc6e686f4 isofs: release buffer head before return
[ Upstream commit 0a6dc67a6aa45f19bd4ff89b4f468fc50c4b8daa ]

Release the buffer_head before returning error code in
do_isofs_readdir() and isofs_find_entry().

Fixes: 2deb1acc65 ("isofs: fix access to unallocated memory when reading corrupted filesystem")
Link: https://lore.kernel.org/r/20210118120455.118955-1-bianpan2016@163.com
Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:38:00 +01:00
Hans de Goede
aa69ea2595 regulator: core: Avoid debugfs: Directory ... already present! error
[ Upstream commit dbe954d8f1635f949a1d9a5d6e6fb749ae022b47 ]

Sometimes regulator_get() gets called twice for the same supply on the
same device. This may happen e.g. when a framework / library is used
which uses the regulator; and the driver itself also needs to enable
the regulator in some cases where the framework will not enable it.

Commit ff268b56ce ("regulator: core: Don't spew backtraces on
duplicate sysfs") already takes care of the backtrace which would
trigger when creating a duplicate consumer symlink under
/sys/class/regulator/regulator.%d in this scenario.

Commit c33d442328 ("debugfs: make error message a bit more verbose")
causes a new error to get logged in this scenario:

[   26.938425] debugfs: Directory 'wm5102-codec-MICVDD' with parent 'spi-WM510204:00-MICVDD' already present!

There is no _nowarn variant of debugfs_create_dir(), but we can detect
and avoid this problem by checking the return value of the earlier
sysfs_create_link_nowarn() call.

Add a check for the earlier sysfs_create_link_nowarn() failing with
-EEXIST and skip the debugfs_create_dir() call in that case, avoiding
this error getting logged.

Fixes: c33d442328 ("debugfs: make error message a bit more verbose")
Cc: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20210122183250.370571-1-hdegoede@redhat.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:38:00 +01:00
Dmitry Osipenko
87f6600119 power: supply: smb347-charger: Fix interrupt usage if interrupt is unavailable
[ Upstream commit 6996312642d2dad3070c3d276c7621f35e721f30 ]

The IRQ=0 could be a valid interrupt number in kernel because interrupt
numbers are virtual in a modern kernel. Hence fix the interrupt usage in
a case if interrupt is unavailable by not overriding the interrupt number
which is used by the driver.

Note that currently Nexus 7 is the only know device which uses SMB347
kernel diver and it has a properly working interrupt, hence this patch
doesn't fix any real problems, it's a minor cleanup/improvement.

Fixes: 99298de5df ("power: supply: smb347-charger: Replace mutex with IRQ disable/enable")
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:59 +01:00
Samuel Holland
564c05da08 power: supply: axp20x_usb_power: Init work before enabling IRQs
[ Upstream commit b5e8642ed95ff6ecc20cc6038fe831affa9d098c ]

The IRQ handler calls mod_delayed_work() on power->vbus_detect. However,
that work item is not initialized until after the IRQs are enabled. If
an IRQ is already pending when the driver is probed, the driver calls
mod_delayed_work() on an uninitialized work item, which causes an oops.

Fixes: bcfb7ae3f5 ("power: supply: axp20x_usb_power: Only poll while offline")
Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:59 +01:00
Krzysztof Kozlowski
b1ff96e919 regulator: s5m8767: Drop regulators OF node reference
[ Upstream commit a5872bd3398d0ff2ce4c77794bc7837899c69024 ]

The device node reference obtained with of_get_child_by_name() should be
dropped on error paths.

Fixes: 26aec009f6 ("regulator: add device tree support for s5m8767")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20210121155914.48034-1-krzk@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:59 +01:00
Pan Bian
ac5ab9c029 spi: atmel: Put allocated master before return
[ Upstream commit 21ea2743f015dbacec1831bdc8afc848db9c2b8c ]

The allocated master is not released. Goto error handling label rather
than directly return.

Fixes: 5e9af37e46 ("spi: atmel: introduce probe deferring")
Signed-off-by: Pan Bian <bianpan2016@163.com>
Fixes: 5e9af37e46 ("spi: atmel: introduce probe deferring")
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20210120050025.25426-1-bianpan2016@163.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:59 +01:00
Pan Bian
1303992207 regulator: s5m8767: Fix reference count leak
[ Upstream commit dea6dd2ba63f8c8532addb8f32daf7b89a368a42 ]

Call of_node_put() to drop references of regulators_np and reg_np before
returning error code.

Fixes: 9ae5cc75ce ("regulator: s5m8767: Pass descriptor instead of GPIO number")
Signed-off-by: Pan Bian <bianpan2016@163.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20210121032756.49501-1-bianpan2016@163.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:59 +01:00
David Howells
d7b0efadc3 certs: Fix blacklist flag type confusion
[ Upstream commit 4993e1f9479a4161fd7d93e2b8b30b438f00cb0f ]

KEY_FLAG_KEEP is not meant to be passed to keyring_alloc() or key_alloc(),
as these only take KEY_ALLOC_* flags.  KEY_FLAG_KEEP has the same value as
KEY_ALLOC_BYPASS_RESTRICTION, but fortunately only key_create_or_update()
uses it.  LSMs using the key_alloc hook don't check that flag.

KEY_FLAG_KEEP is then ignored but fortunately (again) the root user cannot
write to the blacklist keyring, so it is not possible to remove a key/hash
from it.

Fix this by adding a KEY_ALLOC_SET_KEEP flag that tells key_alloc() to set
KEY_FLAG_KEEP on the new key.  blacklist_init() can then, correctly, pass
this to keyring_alloc().

We can also use this in ima_mok_init() rather than setting the flag
manually.

Note that this doesn't fix an observable bug with the current
implementation but it is required to allow addition of new hashes to the
blacklist in the future without making it possible for them to be removed.

Fixes: 734114f878 ("KEYS: Add a system blacklist keyring")
Reported-by: Mickaël Salaün <mic@linux.microsoft.com>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Mickaël Salaün <mic@linux.microsoft.com>
cc: Mimi Zohar <zohar@linux.vnet.ibm.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:59 +01:00
Gabriel Krisman Bertazi
6e223a3d90 watch_queue: Drop references to /dev/watch_queue
[ Upstream commit 8fe62e0c0e2efa5437f3ee81b65d69e70a45ecd2 ]

The merged API doesn't use a watch_queue device, but instead relies on
pipes, so let the documentation reflect that.

Fixes: f7e47677e3 ("watch_queue: Add a key/keyring notification facility")
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Jarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: Ben Boeckel <mathstuf@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:59 +01:00
Pan Bian
a6b732fb6a regulator: axp20x: Fix reference cout leak
[ Upstream commit e78bf6be7edaacb39778f3a89416caddfc6c6d70 ]

Decrements the reference count of device node and its child node.

Fixes: dfe7a1b058 ("regulator: AXP20x: Add support for regulators subsystem")
Signed-off-by: Pan Bian <bianpan2016@163.com>
Link: https://lore.kernel.org/r/20210120123313.107640-1-bianpan2016@163.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:58 +01:00
Evan Benn
863691f865 platform/chrome: cros_ec_proto: Add LID and BATTERY to default mask
[ Upstream commit 852405d8efcbca0e02f14592fb1d1dcd0d3fb508 ]

After 'platform/chrome: cros_ec_proto: Use EC_HOST_EVENT_MASK not BIT'
some of the flags are not quite correct.
LID_CLOSED is used to suspend the device, so it makes sense to ignore that.
BATTERY events are also frequent and causing spurious wakes on elm/hana
mt8173 devices.

Fixes: c214e564ac ("platform/chrome: cros_ec_proto: ignore unnecessary wakeups on old ECs")
Signed-off-by: Evan Benn <evanbenn@chromium.org>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Link: https://lore.kernel.org/r/20201209220306.2.I3291bf83e4884c206b097ede34780e014fa3e265@changeid
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:58 +01:00
Evan Benn
65e8808082 platform/chrome: cros_ec_proto: Use EC_HOST_EVENT_MASK not BIT
[ Upstream commit 0944ea07baa748741563c8842122010fa9017d16 ]

The host_event_code enum is 1-based, use EC_HOST_EVENT_MASK not BIT to
generate the intended mask. This patch changes the behaviour of the
mask, a following patch will restore the intended behaviour:
'Add LID and BATTERY to default mask'

Fixes: c214e564ac ("platform/chrome: cros_ec_proto: ignore unnecessary wakeups on old ECs")
Signed-off-by: Evan Benn <evanbenn@chromium.org>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Link: https://lore.kernel.org/r/20201209220306.1.I6133572c0ab3c6b95426f804bac2d3833e24acb1@changeid
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:58 +01:00
Andre Przywara
d99d58b8df clk: sunxi-ng: h6: Fix clock divider range on some clocks
[ Upstream commit 04ef679591c76571a9e7d5ca48316cc86fa0ef12 ]

While comparing clocks between the H6 and H616, some of the M factor
ranges were found to be wrong: the manual says they are only covering
two bits [1:0], but our code had "5" in the number-of-bits field.

By writing 0xff into that register in U-Boot and via FEL, it could be
confirmed that bits [4:2] are indeed masked off, so the manual is right.

Change to number of bits in the affected clock's description.

Fixes: 524353ea48 ("clk: sunxi-ng: add support for the Allwinner H6 CCU")
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20210118000912.28116-1-andre.przywara@arm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:58 +01:00
Parav Pandit
57ae53cc5a IB/mlx5: Add mutex destroy call to cap_mask_mutex mutex
[ Upstream commit ab40530a2e0a7aca9a5187824c4fb072f3916e85 ]

mutex_destroy() call for device's cap_mask_mutex mutex is missing, let's
add it to annotate destruction.

Fixes: e126ba97db ("mlx5: Add driver for Mellanox Connect-IB adapters")
Link: https://lore.kernel.org/r/20210113121703.559778-4-leon@kernel.org
Signed-off-by: Parav Pandit <parav@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:58 +01:00
Yishai Hadas
a62529e888 RDMA/mlx5: Use the correct obj_id upon DEVX TIR creation
[ Upstream commit 8798e4ad0abe0ba1221928a46561981c510be0c6 ]

Use the correct obj_id upon DEVX TIR creation by strictly taking the tirn
24 bits and not the general obj_id which is 32 bits.

Fixes: 7efce3691d ("IB/mlx5: Add obj create and destroy functionality")
Link: https://lore.kernel.org/r/20201230130121.180350-2-leon@kernel.org
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:58 +01:00
Guido Günther
3577f69201 spi: imx: Don't print error on -EPROBEDEFER
[ Upstream commit 8346633f2c87713a1852d802305e03555e9a9fce ]

This avoids

[    0.962538] spi_imx 30820000.spi: bitbang start failed with -517

durig driver probe.

Fixes: 8197f489f4 ("spi: imx: Fix failure path leak on GPIO request error correctly")
Signed-off-by: Guido Günther <agx@sigxcpu.org>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/0f51ab42e7c7a3452f2f8652794d81584303ea0d.1610987414.git.agx@sigxcpu.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:58 +01:00
Tom Rix
f8b64afe91 clocksource/drivers/mxs_timer: Add missing semicolon when DEBUG is defined
[ Upstream commit 7da390694afbaed8e0f05717a541dfaf1077ba51 ]

When DEBUG is defined this error occurs

drivers/clocksource/mxs_timer.c:138:1: error:
  expected ‘;’ before ‘}’ token

The preceding statement needs a semicolon.
Replace pr_info() with pr_debug() and remove the unneeded ifdef.

Fixes: eb8703e2ef ("clockevents/drivers/mxs: Migrate to new 'set-state' interface")
Signed-off-by: Tom Rix <trix@redhat.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210118211955.763609-1-trix@redhat.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:57 +01:00
Arnd Bergmann
9f5c5595cf clocksource/drivers/ixp4xx: Select TIMER_OF when needed
[ Upstream commit 7a3b8758bd6e45f7b671723b5c9fa2b69d0787ae ]

Compile-testing the ixp4xx timer with CONFIG_OF enabled but
CONFIG_TIMER_OF disabled leads to a harmless warning:

arm-linux-gnueabi-ld: warning: orphan section `__timer_of_table' from `drivers/clocksource/timer-ixp4xx.o' being placed in section `__timer_of_table'

Move the select statement from the platform code into the driver
so it always gets enabled in configurations that rely on it.

Fixes: 40df14cc5c ("clocksource/drivers/ixp4xx: Add OF initialization support")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210103135955.3808976-1-arnd@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:57 +01:00
Randy Dunlap
884d1b0d51 power: supply: fix sbs-charger build, needs REGMAP_I2C
[ Upstream commit a4bdea2004b28f47ab48ea99172eda8628f6fb44 ]

CHARGER_SBS should select REGMAP_I2C since it uses API(s) that are
provided by that Kconfig symbol.

Fixes these errors:

../drivers/power/supply/sbs-charger.c:149:21: error: variable ‘sbs_regmap’ has initializer but incomplete type
 static const struct regmap_config sbs_regmap = {
../drivers/power/supply/sbs-charger.c:150:3: error: ‘const struct regmap_config’ has no member named ‘reg_bits’
  .reg_bits = 8,
../drivers/power/supply/sbs-charger.c:155:23: error: ‘REGMAP_ENDIAN_LITTLE’ undeclared here (not in a function)
  .val_format_endian = REGMAP_ENDIAN_LITTLE, /* since based on SMBus */
../drivers/power/supply/sbs-charger.c: In function ‘sbs_probe’:
../drivers/power/supply/sbs-charger.c:183:17: error: implicit declaration of function ‘devm_regmap_init_i2c’; did you mean ‘devm_request_irq’? [-Werror=implicit-function-declaration]
  chip->regmap = devm_regmap_init_i2c(client, &sbs_regmap);
../drivers/power/supply/sbs-charger.c: At top level:
../drivers/power/supply/sbs-charger.c:149:35: error: storage size of ‘sbs_regmap’ isn’t known
 static const struct regmap_config sbs_regmap = {

Fixes: feb583e37f ("power: supply: add sbs-charger driver")
Reported-by: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Martin Mokrejs <mmokrejs@fold.natur.cuni.cz>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:57 +01:00
Dave Jiang
4f24543828 dmaengine: idxd: set DMA channel to be private
[ Upstream commit c06e424be5f5184468c5f761c0d2cf1ed0a4e0fc ]

Add DMA_PRIVATE attribute flag to idxd DMA channels. The dedicated WQs are
expected to be used by a single client and not shared. While doing NTB
testing this mistake was discovered, which prevented ntb_transport from
requesting DSA wqs as DMA channels via dma_request_channel().

Reported-by: Srinijia Kambham <srinija.kambham@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Tested-by: Srinijia Kambham <srinija.kambham@intel.com>
Fixes: 8f47d1a5e5 ("dmaengine: idxd: connect idxd to dmaengine subsystem")
Link: https://lore.kernel.org/r/161074758743.2184057.3388557138816350980.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:57 +01:00
Bartosz Golaszewski
31c9ba0c38 rtc: s5m: select REGMAP_I2C
[ Upstream commit 1f0cbda3b452b520c5f3794f8f0e410e8bc7386a ]

The rtc-s5m uses the I2C regmap but doesn't select it in Kconfig so
depending on the configuration the build may fail. Fix it.

Fixes: 959df7778b ("rtc: Enable compile testing for Maxim and Samsung drivers")
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210114102219.23682-2-brgl@bgdev.pl
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:57 +01:00
Claudiu Beznea
28c05164b7 power: reset: at91-sama5d2_shdwc: fix wkupdbc mask
[ Upstream commit 95aa21a3f1183260db1b0395e03df5bebc5ed641 ]

According to datasheet WKUPDBC mask is b/w bits 26..24.

Fixes: f80cb48843 ("power: reset: at91-shdwc: add new shutdown controller driver")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:57 +01:00
Jack Wang
e724c819ed RDMA/rtrs-srv: Init wr_cnt as 1
[ Upstream commit 6f5d1b3016d650f351e65c645a5eee5394547dd0 ]

Fix up wr_avail accounting. if wr_cnt is 0, then we do SIGNAL for first
wr, in completion we add queue_depth back, which is not right in the
sense of tracking for available wr.

So fix it by init wr_cnt to 1.

Fixes: 9cb8374804 ("RDMA/rtrs: server: main functionality")
Link: https://lore.kernel.org/r/20201217141915.56989-19-jinpu.wang@cloud.ionos.com
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Gioh Kim <gi-oh.kim@cloud.ionos.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:57 +01:00
Guoqing Jiang
cb6d98b306 RDMA/rtrs-clt: Refactor the failure cases in alloc_clt
[ Upstream commit eab098246625e91c1cbd6e8f75b09e4c9c28a9fc ]

Make all failure cases go to the common path to avoid duplicate code.
And some issued existed before.

1. clt need to be freed to avoid memory leak.

2. return ERR_PTR(-ENOMEM) if kobject_create_and_add fails, because
   rtrs_clt_open checks the return value of by call "IS_ERR(clt)".

Fixes: 6a98d71dae ("RDMA/rtrs: client: main functionality")
Link: https://lore.kernel.org/r/20201217141915.56989-15-jinpu.wang@cloud.ionos.com
Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Reviewed-by: Md Haris Iqbal <haris.iqbal@cloud.ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:57 +01:00
Jack Wang
30b7b6b8da RDMA/rtrs-srv: Fix missing wr_cqe
[ Upstream commit 8537f2de6519945890a2b0f3739b23f32b5c0a89 ]

We had a few places wr_cqe is not set, which could lead to NULL pointer
deref or GPF in error case.

Fixes: 9cb8374804 ("RDMA/rtrs: server: main functionality")
Link: https://lore.kernel.org/r/20201217141915.56989-14-jinpu.wang@cloud.ionos.com
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Reviewed-by: Md Haris Iqbal <haris.iqbal@cloud.ionos.com>
Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:56 +01:00
Guoqing Jiang
e393184841 RDMA/rtrs: Call kobject_put in the failure path
[ Upstream commit 424774c9f3fa100ef7d9cfb9ee211e2ba1cd5119 ]

Per the comment of kobject_init_and_add, we need to free the memory
by call kobject_put.

Fixes: 215378b838 ("RDMA/rtrs: client: sysfs interface functions")
Fixes: 91b11610af ("RDMA/rtrs: server: sysfs interface functions")
Link: https://lore.kernel.org/r/20201217141915.56989-8-jinpu.wang@cloud.ionos.com
Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Reviewed-by: Md Haris Iqbal <haris.iqbal@cloud.ionos.com>
Reviewed-by: Gioh Kim <gi-oh.kim@cloud.ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:56 +01:00
Jack Wang
1a8e1385b2 RDMA/rtrs-clt: Set mininum limit when create QP
[ Upstream commit f47e4e3e71724f625958b0059f6c8ac5d44d27ef ]

Currently rtrs when create_qp use a coarse numbers (bigger in general),
which leads to hardware create more resources which only waste memory
with no benefits.

- SERVICE con,
For max_send_wr/max_recv_wr, it's 2 times SERVICE_CON_QUEUE_DEPTH + 2

- IO con
For max_send_wr/max_recv_wr, it's sess->queue_depth * 3 + 1

Fixes: 6a98d71dae ("RDMA/rtrs: client: main functionality")
Link: https://lore.kernel.org/r/20201217141915.56989-6-jinpu.wang@cloud.ionos.com
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Reviewed-by: Md Haris Iqbal <haris.iqbal@cloud.ionos.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:56 +01:00
Jack Wang
f8f1833d2a RDMA/rtrs-srv: Use sysfs_remove_file_self for disconnect
[ Upstream commit f991fdac813f1598a9bb17b602ce04812ba9148c ]

Remove self first to avoid deadlock, we don't want to
use close_work to remove sess sysfs.

Fixes: 91b11610af ("RDMA/rtrs: server: sysfs interface functions")
Link: https://lore.kernel.org/r/20201217141915.56989-5-jinpu.wang@cloud.ionos.com
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Tested-by: Lutz Pogrell <lutz.pogrell@cloud.ionos.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:56 +01:00
Jack Wang
e3d74840c7 RDMA/rtrs-srv: Release lock before call into close_sess
[ Upstream commit 99f0c3807973359bba8f37d9198eea59fe38c32a ]

In this error case, we don't need hold mutex to call close_sess.

Fixes: 9cb8374804 ("RDMA/rtrs: server: main functionality")
Link: https://lore.kernel.org/r/20201217141915.56989-4-jinpu.wang@cloud.ionos.com
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Tested-by: Lutz Pogrell <lutz.pogrell@cloud.ionos.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:56 +01:00
Jack Wang
0a131e09e4 RDMA/rtrs: Extend ibtrs_cq_qp_create
[ Upstream commit 7490fd1fe836ba3c7eda7a4b1cfd9e44389ffda5 ]

rtrs does not have same limit for both max_send_wr and max_recv_wr,
To allow client and server set different values, export in a separate
parameter for rtrs_cq_qp_create.

Also fix the type accordingly, u32 should be used instead of u16.

Fixes: c0894b3ea6 ("RDMA/rtrs: core: lib functions shared between client and server modules")
Link: https://lore.kernel.org/r/20201217141915.56989-2-jinpu.wang@cloud.ionos.com
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Reviewed-by: Md Haris Iqbal <haris.iqbal@cloud.ionos.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:56 +01:00
Nicolas Boichat
54d3a57619 of/fdt: Make sure no-map does not remove already reserved regions
[ Upstream commit 8a5a75e5e9e55de1cef5d83ca3589cb4899193ef ]

If the device tree is incorrectly configured, and attempts to
define a "no-map" reserved memory that overlaps with the kernel
data/code, the kernel would crash quickly after boot, with no
obvious clue about the nature of the issue.

For example, this would happen if we have the kernel mapped at
these addresses (from /proc/iomem):
40000000-41ffffff : System RAM
  40080000-40dfffff : Kernel code
  40e00000-411fffff : reserved
  41200000-413e0fff : Kernel data

And we declare a no-map shared-dma-pool region at a fixed address
within that range:
mem_reserved: mem_region {
	compatible = "shared-dma-pool";
	reg = <0 0x40000000 0 0x01A00000>;
	no-map;
};

To fix this, when removing memory regions at early boot (which is
what "no-map" regions do), we need to make sure that the memory
is not already reserved. If we do, __reserved_mem_reserve_reg
will throw an error:
[    0.000000] OF: fdt: Reserved memory: failed to reserve memory
   for node 'mem_region': base 0x0000000040000000, size 26 MiB
and the code that will try to use the region should also fail,
later on.

We do not do anything for non-"no-map" regions, as memblock
explicitly allows reserved regions to overlap, and the commit
that this fixes removed the check for that precise reason.

[ qperret: fixed conflicts caused by the usage of memblock_mark_nomap ]

Fixes: 094cb98179 ("of/fdt: memblock_reserve /memreserve/ regions in the case of partial overlap")
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Quentin Perret <qperret@google.com>
Link: https://lore.kernel.org/r/20210115114544.1830068-3-qperret@google.com
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 11:37:56 +01:00