linux_dsm_epyc7002/drivers/dma
Andy Shevchenko 4831e0d905 serial: 8250_mid: handle interrupt correctly in DMA case
Starting from Tangier B0 and continuing on Anniedale the HSU DMA interrupt
line is actually shared with UART. Handling them independently is racy and
quite often comes with the following traceback.

 irq 54: nobody cared (try booting with the "irqpoll" option)
 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.0-rc6-edison64-86244934+ #1
 Hardware name: Intel Corporation Merrifield/BODEGA BAY, BIOS 542 2015.01.21:18.19.48
  ffff88003f203eb0 ffffffff8130e718 ffff880032627000 ffff88003262709c
  ffff88003f203ed8 ffffffff810a3960 ffff880032627000 0000000000000000
  ffff880032627000 ffff88003f203f10 ffffffff810a3cc7 ffff880032627000
 Call Trace:
  <IRQ>
  [<ffffffff8130e718>] dump_stack+0x4d/0x65
  [<ffffffff810a3960>] __report_bad_irq+0x30/0xc0
  [<ffffffff810a3cc7>] note_interrupt+0x227/0x270
  [<ffffffff810a1380>] handle_irq_event_percpu+0x40/0x50
  [<ffffffff810a13b7>] handle_irq_event+0x27/0x50
  [<ffffffff810a42d5>] handle_fasteoi_irq+0x85/0x150
  [<ffffffff8101d7fe>] handle_irq+0x6e/0x120
  [<ffffffff8105b8bc>] ? _local_bh_enable+0x1c/0x50
  [<ffffffff8101d0d6>] do_IRQ+0x46/0xd0
  [<ffffffff818cef3f>] common_interrupt+0x7f/0x7f
  <EOI>
  [<ffffffff818cdead>] ? mwait_idle+0x7d/0x140
  [<ffffffff81024c9a>] arch_cpu_idle+0xa/0x10
  [<ffffffff818ce150>] default_idle_call+0x20/0x30
  [<ffffffff810908fd>] cpu_startup_entry+0x16d/0x1d0
  [<ffffffff818c882d>] rest_init+0x6d/0x70
  [<ffffffff81f93e8f>] start_kernel+0x3e2/0x3ef
  [<ffffffff81f9343d>] x86_64_start_reservations+0x38/0x3a
  [<ffffffff81f93529>] x86_64_start_kernel+0xea/0xed
 handlers:
 [<ffffffff81411670>] serial8250_interrupt
 Disabling IRQ #54

Fix this by handling interrupt only in one place.

The issue is discussed here: https://github.com/andy-shev/linux/issues/5

Moreover this also fixes another bug when Rx DMA returns wrong residue and we
can't rely on it.

Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-01-19 14:20:23 +01:00
..
bestcomm dmaengine: NO_IRQ removal from powerpc-only drivers 2016-09-14 18:57:38 +05:30
dw dmaengine: dw: fix typo in Kconfig 2017-01-02 08:13:00 +05:30
hsu serial: 8250_mid: handle interrupt correctly in DMA case 2017-01-19 14:20:23 +01:00
ioat dmaengine: iota: ioat_alloc_chan_resources should not perform sleeping allocations. 2017-01-10 10:41:51 +05:30
ipu Merge branch 'topic/no_irq' into for-linus 2016-10-03 09:18:29 +05:30
ppc4xx Merge branch 'topic/unmap_cleanup' into for-linus 2016-10-03 09:36:11 +05:30
qcom dmaengine: qcom_hidma: autoload while probing ACPI 2016-11-23 09:47:32 +05:30
sh dmaengine: rcar-dmac: unmap slave resource when channel is freed 2017-01-13 12:14:28 +05:30
xilinx dmengine: xilinx_dma: convert callback to helper function 2016-08-08 08:11:43 +05:30
acpi-dma.c dmaengine: acpi-dma: align debug message with flow 2016-02-22 09:06:09 +05:30
amba-pl08x.c dmaengine: pl08x: Add support for the DMA slave map 2016-11-17 15:51:28 +05:30
at_hdmac_regs.h dmaengine: at_hdmac: use %pad format string for dma_addr_t 2015-11-16 09:21:05 +05:30
at_hdmac.c dmaengine: at_hdmac: move to dma_pool_zalloc 2016-12-08 21:24:17 +05:30
at_xdmac.c dmaengine: at_xdmac: don't restore unsaved status 2016-12-06 10:45:48 +05:30
bcm2835-dma.c dmaengine: bcm2835: fix 64-bit warning 2016-07-06 22:39:43 +05:30
coh901318_lli.c dmaengine: coh901318: use NULL for pointer initialization 2016-09-26 22:28:24 +05:30
coh901318.c Merge branch 'topic/err_reporting' into for-linus 2016-10-03 09:17:33 +05:30
coh901318.h dma: coh901318: merge header files 2013-01-07 17:36:37 +01:00
cppi41.c dmaengine: cppi41: More PM runtime fixes 2016-11-17 16:09:23 +05:30
dma-axi-dmac.c dmaengine: axi-dmac: Return IRQ_NONE if no IRQs are pending 2016-07-01 22:56:41 +05:30
dma-jz4740.c dmaengine: jz4740: remove unused arch header 2016-09-26 22:25:57 +05:30
dma-jz4780.c Merge branch 'topic/compile_test' into for-linus 2016-10-03 09:16:03 +05:30
dmaengine.c dmaengine: device must have at least one channel 2016-08-22 11:49:07 +05:30
dmaengine.h dmaengine: add support to provide error result from a DMA transation 2016-08-08 08:11:42 +05:30
dmatest.c ktime: Cleanup ktime_set() usage 2016-12-25 17:21:22 +01:00
edma.c dmaengine updates for 4.10-rc1 2016-12-14 20:42:45 -08:00
ep93xx_dma.c Merge branch 'topic/err_reporting' into for-linus 2016-10-03 09:17:33 +05:30
fsl_raid.c dmaengine: fsl_raid: Fix module autoload 2016-11-14 08:35:13 +05:30
fsl_raid.h dmaengine: Driver support for FSL RaidEngine device. 2015-04-02 16:10:27 +05:30
fsl-edma.c dmaengine: fsl-edma: kill the tasklets upon exit 2016-07-16 20:19:00 +05:30
fsldma.c Merge branch 'topic/unmap_cleanup' into for-linus 2016-10-03 09:36:11 +05:30
fsldma.h dmaengine: fsldma: declare slave capabilities for the generic code 2015-01-13 23:58:08 +05:30
idma64.c dmaengine: idma64: clear LLP_[SD]_EN bits in last descriptor 2016-02-15 22:06:45 +05:30
idma64.h asm-generic changes for 4.6 2016-03-24 23:13:48 -07:00
img-mdc-dma.c dmaengine: img-mdc: remove unused ‘prev_phys’ 2016-12-12 22:25:22 +05:30
imx-dma.c dmaengine: imx-dma: convert callback to helper function 2016-08-08 08:11:39 +05:30
imx-sdma.c dmaengine: imx-sdma - correct the dma transfer residue calculation 2016-11-25 11:05:14 +05:30
iop-adma.c dmaengine: iop-adma: convert callback to helper function 2016-08-08 08:11:39 +05:30
k3dma.c dmaengine: k3dma: move to dma_pool_zalloc 2016-12-08 21:24:21 +05:30
Kconfig dmaengine updates for 4.10-rc1 2016-12-14 20:42:45 -08:00
lpc18xx-dmamux.c dmaengine: add driver for lpc18xx dmamux 2015-08-18 22:12:14 +05:30
Makefile dmaengine: st_fdma: Add STMicroelectronics FDMA engine driver support 2016-10-18 20:12:06 +05:30
mic_x100_dma.c dmaengine: mic_x100_dma: remove unused ‘data’ 2016-12-12 22:25:22 +05:30
mic_x100_dma.h dmaengine: Add an enum for the dmaengine alignment constraints 2015-08-05 10:53:52 +05:30
mmp_pdma.c dmaengine: mmp_pdma: convert callback to helper function 2016-08-08 08:11:39 +05:30
mmp_tdma.c Merge branch 'topic/err_reporting' into for-linus 2016-10-03 09:17:33 +05:30
moxart-dma.c dmaengine: moxart: remove NO_IRQ 2016-09-05 16:40:52 +05:30
mpc512x_dma.c Merge branch 'topic/err_reporting' into for-linus 2016-10-03 09:17:33 +05:30
mv_xor_v2.c dmaengine: mv_xor_v2: remove trailing whitespace 2016-07-12 10:10:00 +05:30
mv_xor.c dmaengine: mv_xor: use builtin_platform_driver 2016-11-25 11:47:39 +05:30
mv_xor.h dmaengine: mv_xor: Add support for scatter-gather DMA mode 2016-11-25 11:16:36 +05:30
mxs-dma.c Merge branch 'topic/no_irq' into for-linus 2016-10-03 09:18:29 +05:30
nbpfaxi.c dmaengine: nbpfaxi: add optional max-burst property for memory reads/writes 2016-11-14 10:07:58 +05:30
of-dma.c dmaengine: of_dma: approximate an average distribution 2016-05-14 13:34:10 +05:30
omap-dma.c dmaengine: omap-dma: Fix the port_window support 2017-01-10 11:08:01 +05:30
pch_dma.c dmaengine: pch_dma: remove unused ‘cookie’ 2016-12-12 22:25:22 +05:30
pl330.c dmaengine: pl330: Fix runtime PM support for terminated transfers 2017-01-03 09:18:13 +05:30
pxa_dma.c Revert "dmaengine: pxa_dma: add support for legacy transition" 2016-10-18 20:14:32 +05:30
s3c24xx-dma.c dmaengine: s3c24xx: remove unused ‘cdata’ 2016-12-12 22:25:22 +05:30
sa11x0-dma.c dmaengine: sa11x0: use correct print specifiers for size_t 2016-09-26 22:29:26 +05:30
sirf-dma.c dmaengine: sirf-dma: remove unused ‘sdesc’ 2016-12-12 22:25:22 +05:30
st_fdma.c dmaengine: st_fdma: Fix the error return code in st_fdma_probe() 2016-10-19 22:29:33 +05:30
st_fdma.h dmaengine: st_fdma: Add STMicroelectronics FDMA driver header file 2016-10-18 20:12:06 +05:30
ste_dma40_ll.c dmaengine: ste_dma40_ll: make d40_width_to_bits static 2016-06-08 08:59:55 +05:30
ste_dma40_ll.h dmaengine: ste_dma40: Remove unnecessary call to d40_phy_cfg() 2013-05-23 21:13:19 +02:00
ste_dma40.c Merge branch 'topic/ste_dma40' into for-linus 2016-10-03 09:35:55 +05:30
stm32-dma.c dmaengine: stm32-dma: Fix null pointer dereference in stm32_dma_tx_status 2017-01-02 09:28:52 +05:30
sun4i-dma.c remove lots of IS_ERR_VALUE abuses 2016-05-27 15:26:11 -07:00
sun6i-dma.c dmaengine: sun6i: fix the uninitialized value for v_lli 2016-11-25 11:49:38 +05:30
tegra20-apb-dma.c dmaengine: tegra20-apb-dma: convert callback to helper function 2016-08-08 08:11:41 +05:30
tegra210-adma.c dmaengine: tegra210-adma: Update driver to use of_pm_clk_add_clk 2016-08-22 11:55:05 +05:30
ti-dma-crossbar.c dmaengine: ti-dma-crossbar: Add some 'of_node_put()' in error path. 2017-01-02 10:37:26 +05:30
timb_dma.c dmaengine: timb_dma: convert callback to helper function 2016-08-08 08:11:41 +05:30
TODO dmaengine: dw: don't perform DMA when dmaengine_submit is called 2014-07-15 22:14:30 +05:30
txx9dmac.c dmaengine: txx9dmac: convert callback to helper function 2016-08-08 08:11:41 +05:30
txx9dmac.h MIPS: Replace MIPS-specific 64BIT_PHYS_ADDR with generic PHYS_ADDR_T_64BIT 2014-11-24 22:46:44 +01:00
virt-dma.c dmaengine: virt-dma: convert callback to helper function 2016-08-08 08:11:41 +05:30
virt-dma.h dmaengine: virt-dma: move function declarations 2016-10-01 11:41:39 +05:30
xgene-dma.c dmaengine: xgene-dma: move unmap to before callback 2016-08-08 08:11:43 +05:30
zx296702_dma.c dmaengine: zx296702_dma: Use dma_pool_zalloc 2016-11-30 08:50:40 +05:30