kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-10-16 22:39:48 +00:00
Code Issues Releases Packages Activity
linux/drivers/dma
History
Krister Johansen 2382c1486c dmaengine: iota: ioat_alloc_chan_resources should not perform sleeping allocations. 
commit 21d25f6a42 upstream.

On a kernel with DEBUG_LOCKS, ioat_free_chan_resources triggers an
in_interrupt() warning.  With PROVE_LOCKING, it reports detecting a
SOFTIRQ-safe to SOFTIRQ-unsafe lock ordering in the same code path.

This is because dma_generic_alloc_coherent() checks if the GFP flags
permit blocking.  It allocates from different subsystems if blocking is
permitted.  The free path knows how to return the memory to the correct
allocator.  If GFP_KERNEL is specified then the alloc and free end up
going through cma_alloc(), which uses mutexes.

Given that ioat_free_chan_resources() can be called in interrupt
context, ioat_alloc_chan_resources() must specify GFP_NOWAIT so that the
allocations do not block and instead use an allocator that uses
spinlocks.

Signed-off-by: Krister Johansen <kjlx@templeofstupid.com>
Acked-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2017-03-22 12:43:35 +01:00
..
bestcomm dmaengine: NO_IRQ removal from powerpc-only drivers 2016-09-14 18:57:38 +05:30
dw dmaengine updates for 4.8-rc1 2016-10-06 17:13:54 -07:00
hsu dmaengine: hsu: refactor hsu_dma_do_irq() to return int 2016-09-15 21:15:40 +05:30
ioat dmaengine: iota: ioat_alloc_chan_resources should not perform sleeping allocations. 2017-03-22 12:43:35 +01:00
ipu dmaengine: ipu: Make sure the interrupt routine checks all interrupts. 2017-03-12 06:41:52 +01:00
ppc4xx Merge branch 'topic/unmap_cleanup' into for-linus 2016-10-03 09:36:11 +05:30
qcom dmaengine: qcom_hidma: add error reporting for tx_status 2016-08-31 21:27:32 +05:30
sh dmaengine: rcar-dmac: unmap slave resource when channel is freed 2017-01-26 08:24:45 +01:00
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: Remove site specific OOM error messages on kzalloc 2016-06-21 21:35:00 +05:30
at_hdmac.c dmaengine: at_hdmac: convert callback to helper function 2016-08-08 08:11:38 +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_xdmac.c dmaengine updates for 4.8-rc1 2016-10-06 17:13:54 -07:00
bcm2835-dma.c dmaengine: bcm2835: fix 64-bit warning 2016-07-06 22:39:43 +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
coh901318_lli.c dmaengine: coh901318: use NULL for pointer initialization 2016-09-26 22:28:24 +05:30
cppi41.c dmaengine: cppi41: Fix oops in cppi41_runtime_resume 2017-02-09 08:08:29 +01:00
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 dmaengine: dmatest: Restore "memcpy" as default mode 2016-09-15 21:17:58 +05:30
edma.c dmaengine: edma: Fix error return code in edma_alloc_chan_resources() 2016-10-18 20:18:14 +05:30
ep93xx_dma.c Merge branch 'topic/err_reporting' into for-linus 2016-10-03 09:17:33 +05:30
fsl-edma.c dmaengine: fsl-edma: kill the tasklets upon exit 2016-07-16 20:19:00 +05:30
fsl_raid.c dmaengine updates for 4.8-rc1 2016-10-06 17:13:54 -07:00
fsl_raid.h dmaengine: Driver support for FSL RaidEngine device. 2015-04-02 16:10:27 +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: fix a possible NULL dereference 2016-08-22 11:57:49 +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 2017-03-15 10:02:49 +08:00
iop-adma.c dmaengine: iop-adma: convert callback to helper function 2016-08-08 08:11:39 +05:30
k3dma.c dmaengine: k3dma: use correct format string for debug output 2016-09-07 13:38:43 +05:30
Kconfig dmaengine: mmp_tdma: add missing select GENERIC_ALLOCATOR in Kconfig 2016-10-18 20:32:56 +05:30
lpc18xx-dmamux.c dmaengine: add driver for lpc18xx dmamux 2015-08-18 22:12:14 +05:30
Makefile dmaengine: mv_xor_v2: new driver 2016-07-12 10:09:53 +05:30
mic_x100_dma.c dmaengine: mic_x100_dma: convert callback to helper function 2016-08-08 08:11:39 +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.c Merge branch 'topic/unmap_cleanup' into for-linus 2016-10-03 09:36:11 +05:30
mv_xor.h dmaengine: mv_xor: Add support for IO (PCIe) src/dst areas 2016-09-15 21:13:59 +05:30
mv_xor_v2.c dmaengine: mv_xor_v2: remove trailing whitespace 2016-07-12 10:10:00 +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: convert callback to helper function 2016-08-08 08:11:40 +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 dynamic lch_map allocation 2017-01-19 20:18:03 +01:00
pch_dma.c dmaengine: pch_dma: convert callback to helper function 2016-08-08 08:11:40 +05:30
pl330.c dmaengine: pl330: Fix runtime PM support for terminated transfers 2017-01-26 08:24:45 +01:00
pxa_dma.c dmaengine: pxa_dma: fix debug message 2016-08-19 16:17:26 +05:30
s3c24xx-dma.c Merge branch 'topic/compile_test' into for-linus 2016-10-03 09:16:03 +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 Merge branch 'topic/no_irq' into for-linus 2016-10-03 09:18:29 +05:30
ste_dma40.c Merge branch 'topic/ste_dma40' into for-linus 2016-10-03 09:35:55 +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
stm32-dma.c dmaengine: stm32-dma: make stm32_dma_set_config static 2016-09-26 22:31:36 +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 2016-11-14 10:35:58 +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: Fix of_device_id data parameter usage 2016-09-28 08:54:28 +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 updates for 4.4-rc1 2015-11-10 10:05:17 -08:00