linux_dsm_epyc7002/drivers/usb/host
Miquel Raynal eb6c2eb6c7 usb: host: xhci-plat: Prevent an abnormally restrictive PHY init skipping
In the past, USB PHY handling has been moved in the HCD core. Some
host controller drivers needing more control of the PHYs, they have
been granted the freedom to handle themselves the PHY states and to
prevent the HCD core to do so in commit 4e88d4c083 ("usb: add a flag
to skip PHY initialization to struct usb_hcd"). With this change, any
USB host controller could set the hcd->skip_phy_initialization flag so
that the HCD core would just skip the PHY initialization sequence.

However, in the USB subsystem, there are currently two entirely
different forms of PHY: one is called 'usb_phy' and is
USB-subsystem-wide, while there is also the generic and kernel-wide
'phy' from the (recent) generic PHY framework.

When the commit above was introduced, both type of PHYs where handled
by the HCD core.

Later, commit bc40f53417 ("USB: core: hcd: drop support for legacy
phys") removed the support for the former type of PHYs in the HCD
core. These 'usb_phy' are still present though, but managed from the
controller drivers only. Hence, setting the
hcd->skip_phy_initialization flag just because a 'usb_phy' is
initialized by a controller driver is a non-sense.

For instance on Armada CP110, a 'usb_phy' is there to enable the power
supply to the USB host, while there is also a COMPHY block providing
SERDES lanes configuration that is referenced as a PHY from the common
PHY framework.

Right now, users of the xhci-plat.c driver either use a 'usb_phy' only
and do not care about the attempt of generic PHY initialization within
the HCD core (as there is none); or they use a single 'phy' and the
code flow does not pass through the block setting
hcd->skip_phy_initialization anyway.

While there is not users of both PHY types at the same time, drop this
limitation from the xhci-plat.c driver. Note that the tegra driver
probably has the same limitation and could definitely benefit from a
similar change.

Cc: Johan Hovold <johan@kernel.org>
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://lore.kernel.org/r/20190731121150.2253-1-miquel.raynal@bootlin.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-08-01 18:08:54 +02:00
..
whci USB: host: whci: rename Kbuild file 2019-01-22 09:08:17 +01:00
bcma-hcd.c
ehci-atmel.c usb: Remove dev_err() usage after platform_get_irq() 2019-07-30 20:29:18 +02:00
ehci-dbg.c USB: ehci-hcd: no need to check return value of debugfs_create functions 2018-05-31 12:54:22 +02:00
ehci-exynos.c usb: exynos: add support for getting PHYs from the standard dt array 2019-07-30 13:00:37 +02:00
ehci-fsl.c usb: host: Stops USB controller init if PLL fails to lock 2019-07-03 18:52:20 +02:00
ehci-fsl.h usb: phy: Workaround for USB erratum-A005728 2019-07-03 18:52:20 +02:00
ehci-grlib.c
ehci-hcd.c USB: drop HCD_LOCAL_MEM flag 2019-06-03 16:00:08 +02:00
ehci-hub.c USB: ehci-hcd: Add get_resuming_ports method 2018-06-25 21:44:43 +08:00
ehci-mem.c Revert "usb: host: ehci: Use dma_pool_zalloc()" 2018-05-04 14:35:12 -07:00
ehci-mv.c USB: EHCI: ehci-mv: add MODULE_DEVICE_TABLE 2019-01-18 10:07:05 +01:00
ehci-mxc.c
ehci-npcm7xx.c USB: host: ehci-npcm7xx: Fix some error codes in probe 2018-06-28 19:32:42 +09:00
ehci-omap.c usb: Remove dev_err() usage after platform_get_irq() 2019-07-30 20:29:18 +02:00
ehci-orion.c usb: Remove dev_err() usage after platform_get_irq() 2019-07-30 20:29:18 +02:00
ehci-pci.c usb: pci-quirks: Minor cleanup for AMD PLL quirk 2019-07-25 10:40:02 +02:00
ehci-platform.c usb: Remove dev_err() usage after platform_get_irq() 2019-07-30 20:29:18 +02:00
ehci-pmcmsp.c
ehci-ppc-of.c
ehci-ps3.c powerpc/ps3: Set driver coherent_dma_mask 2018-07-20 12:50:37 +10:00
ehci-q.c usb: host: Replace empty define with do while 2018-09-28 15:03:37 +02:00
ehci-sched.c usb: host: ehci-sched: remove redundant pointer dev 2018-07-13 15:41:56 +02:00
ehci-sh.c usb: Remove dev_err() usage after platform_get_irq() 2019-07-30 20:29:18 +02:00
ehci-spear.c
ehci-st.c usb: Remove dev_err() usage after platform_get_irq() 2019-07-30 20:29:18 +02:00
ehci-sysfs.c
ehci-tegra.c usb: tegra: Move utmi-pads reset from ehci-tegra to tegra-phy 2018-04-23 09:50:57 +02:00
ehci-timer.c usb: host: Replace empty define with do while 2018-09-28 15:03:37 +02:00
ehci-w90x900.c
ehci-xilinx-of.c
ehci.h usb: host: Replace empty define with do while 2018-09-28 15:03:37 +02:00
fhci-dbg.c USB: fhci-hcd: no need to check return value of debugfs_create functions 2018-05-31 12:54:22 +02:00
fhci-hcd.c
fhci-hub.c
fhci-mem.c
fhci-q.c
fhci-sched.c usb: host: use usb_endpoint_maxp instead of usb_maxpacket 2019-04-19 14:23:34 +02:00
fhci-tds.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
fhci.h USB: fhci-hcd: no need to check return value of debugfs_create functions 2018-05-31 12:54:22 +02:00
fotg210-hcd.c dma-mapping updates for Linux 5.3 2019-07-12 15:13:55 -07:00
fotg210.h usb: host: Replace empty define with do while 2018-09-28 15:03:37 +02:00
fsl-mph-dr-of.c usb :fsl: Change string format for errata property 2019-07-03 18:52:20 +02:00
hwa-hc.c usb: wusbcore: fix unbalanced get/put cluster_id 2019-07-25 10:40:03 +02:00
imx21-dbg.c USB: imx21-hcd: no need to check return value of debugfs_create functions 2018-05-31 12:54:22 +02:00
imx21-hcd.c usb: Remove dev_err() usage after platform_get_irq() 2019-07-30 20:29:18 +02:00
imx21-hcd.h
isp116x-hcd.c USB: isp116x-hcd: no need to check return value of debugfs_create functions 2018-05-31 12:54:21 +02:00
isp116x.h
isp1362-hcd.c usb: host: isp1362-hcd: convert to DEFINE_SHOW_ATTRIBUTE 2018-12-12 12:38:41 +01:00
isp1362.h usb: isp1362: Spelling s/eclusive/exclusive/ 2019-06-18 08:51:28 +02:00
Kconfig docs: usb: rename files to .rst and add them to drivers-api 2019-06-20 14:28:36 +02:00
Makefile USB: EHCI: make ehci-mv a separate driver 2018-09-20 13:07:55 +02:00
max3421-hcd.c
ohci-at91.c USB: host: ohci-at91: add sam9x60-sfr definition for ohci 2019-01-18 09:58:04 +01:00
ohci-da8xx.c usb: ohci-da8xx: drop the vbus GPIO 2019-04-12 19:46:48 +05:30
ohci-dbg.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
ohci-exynos.c usb: exynos: add support for getting PHYs from the standard dt array 2019-07-30 13:00:37 +02:00
ohci-hcd.c usb: host: Fix excessive alignment restriction for local memory allocations 2019-06-28 07:57:07 +02:00
ohci-hub.c
ohci-mem.c usb: host: Fix excessive alignment restriction for local memory allocations 2019-06-28 07:57:07 +02:00
ohci-nxp.c
ohci-omap.c usb: add a flag to skip PHY initialization to struct usb_hcd 2018-03-09 09:43:52 -08:00
ohci-pci.c usb: pci-quirks: Minor cleanup for AMD PLL quirk 2019-07-25 10:40:02 +02:00
ohci-platform.c usb: Remove dev_err() usage after platform_get_irq() 2019-07-30 20:29:18 +02:00
ohci-ppc-of.c
ohci-ps3.c powerpc/ps3: Set driver coherent_dma_mask 2018-07-20 12:50:37 +10:00
ohci-pxa27x.c
ohci-q.c
ohci-s3c2410.c usb: ohci-s3c2410: Remove set but not used variable 'hcd' 2019-06-03 15:21:57 +02:00
ohci-sa1111.c
ohci-sm501.c USB: drop HCD_LOCAL_MEM flag 2019-06-03 16:00:08 +02:00
ohci-spear.c USB: ohci-spear: Remove set but not used variable 'ohci' 2019-06-03 15:21:57 +02:00
ohci-st.c usb: Remove dev_err() usage after platform_get_irq() 2019-07-30 20:29:18 +02:00
ohci-tmio.c usb: host: ohci-tmio: Mark expected switch fall-throughs 2019-07-30 13:00:38 +02:00
ohci.h USB: use genalloc for USB HCs with local memory 2019-06-03 16:00:07 +02:00
oxu210hp-hcd.c usb: host: oxu210hp-hcd: squash oxu210hp.h into oxu210hp-hcd.c 2019-07-25 11:07:42 +02:00
pci-quirks.c usb: pci-quirks: Minor cleanup for AMD PLL quirk 2019-07-25 10:40:02 +02:00
pci-quirks.h usb: pci-quirks: Minor cleanup for AMD PLL quirk 2019-07-25 10:40:02 +02:00
r8a66597-hcd.c usb: r8a66597: Fix a possible concurrency use-after-free bug in r8a66597_endpoint_disable() 2018-12-19 08:13:26 +01:00
r8a66597.h
sl811_cs.c
sl811-hcd.c USB: host: sl811: Re-use DEFINE_SHOW_ATTRIBUTE() macro 2018-03-16 15:40:19 +01:00
sl811.h
ssb-hcd.c
u132-hcd.c usb: host: u132-hcd: remove unneeded variable frame 2019-06-06 08:59:19 +02:00
uhci-debug.c
uhci-grlib.c
uhci-hcd.c USB: drop HCD_LOCAL_MEM flag 2019-06-03 16:00:08 +02:00
uhci-hcd.h
uhci-hub.c
uhci-pci.c
uhci-platform.c
uhci-q.c
xhci-dbg.c
xhci-dbgcap.c usb: host: Remove call to memset after dma_alloc_coherent 2019-07-25 11:10:54 +02:00
xhci-dbgcap.h usb: xhci: dbc: Add SPDX identifiers to dbc files 2018-05-24 18:03:07 +02:00
xhci-dbgtty.c usb: xhci: dbc: Add SPDX identifiers to dbc files 2018-05-24 18:03:07 +02:00
xhci-debugfs.c usb: xhci: Fix a potential null pointer dereference in xhci_debugfs_create_endpoint() 2019-05-22 14:25:37 +02:00
xhci-debugfs.h usb: xhci: remove unused member 'parent' in xhci_regset struct 2019-02-20 20:18:23 +01:00
xhci-ext-caps.c xhci: Add Intel extended cap / otg phy mux handling 2018-03-22 13:40:10 +01:00
xhci-ext-caps.h xhci: Add Intel extended cap / otg phy mux handling 2018-03-22 13:40:10 +01:00
xhci-histb.c xhci: Fix leaking USB3 shared_hcd at xhci removal 2018-11-09 08:31:08 -08:00
xhci-hub.c usb: host: xhci-hub: fix extra endianness conversion 2019-07-25 11:10:55 +02:00
xhci-mem.c usb: host: Remove call to memset after dma_alloc_coherent 2019-07-25 11:10:54 +02:00
xhci-mtk-sch.c usb: xhci-mtk: supports SSP without external USB3 gen2 hub 2018-09-28 15:04:45 +02:00
xhci-mtk.c usb: xhci-mtk: get optional clock by devm_clk_get_optional() 2019-04-19 14:23:34 +02:00
xhci-mtk.h usb: xhci-mtk: supports bandwidth scheduling with multi-TT 2018-09-28 15:04:45 +02:00
xhci-mvebu.c usb: host: xhci: mvebu: add reset on resume quirk 2019-01-30 09:22:35 +01:00
xhci-mvebu.h usb: host: xhci: mvebu: add reset on resume quirk 2019-01-30 09:22:35 +01:00
xhci-pci.c usb: pci-quirks: Minor cleanup for AMD PLL quirk 2019-07-25 10:40:02 +02:00
xhci-plat.c usb: host: xhci-plat: Prevent an abnormally restrictive PHY init skipping 2019-08-01 18:08:54 +02:00
xhci-plat.h
xhci-rcar.c usb: host: xhci-rcar: Add XHCI_TRUST_TX_LENGTH quirk 2019-03-19 14:57:31 +01:00
xhci-rcar.h
xhci-ring.c Merge 5.2-rc6 into usb-next 2019-06-23 09:21:15 +02:00
xhci-tegra.c usb: host: xhci-tegra: Fix Wunused-const-variable 2019-06-18 08:44:09 +02:00
xhci-trace.c
xhci-trace.h usb: xhci: add endpoint context tracing when an endpoint is added 2019-04-27 14:53:58 +02:00
xhci.c Merge 5.2-rc6 into usb-next 2019-06-23 09:21:15 +02:00
xhci.h xhci: Fix crash if scatter gather is used with Immediate Data Transfer (IDT). 2019-07-25 11:26:42 +02:00