Ben Dooks 04ce0e7695 dmaengine: tegra: avoid overflow of byte tracking ... [ Upstream commit e486df39305864604b7e25f2a95d51039517ac57 ] The dma_desc->bytes_transferred counter tracks the number of bytes moved by the DMA channel. This is then used to calculate the information passed back in the in the tegra_dma_tx_status callback, which is usually fine. When the DMA channel is configured as continous, then the bytes_transferred counter will increase over time and eventually overflow to become negative so the residue count will become invalid and the ALSA sound-dma code will report invalid hardware pointer values to the application. This results in some users becoming confused about the playout position and putting audio data in the wrong place. To fix this issue, always ensure the bytes_transferred field is modulo the size of the request. We only do this for the case of the cyclic transfer done ISR as anyone attempting to move 2GiB of DMA data in one transfer is unlikely. Note, we don't fix the issue that we should /never/ transfer a negative number of bytes so we could make those fields unsigned. Reviewed-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> Acked-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Vinod Koul <vkoul@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2019-04-27 09:33:53 +02:00
..
bestcomm	dmaengine: constify of_device_id array	2015-03-18 22:13:14 +05:30
dw	dmaengine: dw: fix master selection	2016-05-04 14:48:42 -07:00
hsu	dmaengine: hsu: correct use of channel status register	2016-05-04 14:48:42 -07:00
ioat	driver/dma/ioat: Call del_timer_sync() without holding prep_lock	2018-11-21 09:27:33 +01:00
ipu	dmaengine: ipu: Make sure the interrupt routine checks all interrupts.	2017-03-12 06:37:30 +01:00
ppc4xx	dmaengine: Remove FSF mailing addresses	2015-03-16 22:28:15 +05:30
sh	dmaengine: usb-dmac: Make DMAC system sleep callbacks explicit	2019-03-23 08:44:36 +01:00
xilinx	dmaengine: xilinx: Fix module autoload for OF platform driver	2015-10-01 07:35:39 +05:30
acpi-dma.c	dmaengine updates for 4.4-rc1	2015-11-10 10:05:17 -08:00
amba-pl08x.c	dmaengine: pl08x: support dt channel assignment	2015-08-18 22:12:14 +05:30
at_hdmac.c	dmaengine: at_hdmac: fix module unloading	2018-12-13 09:21:27 +01:00
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: at_xdmac: Fix wrongfull report of a channel as in use	2019-03-23 08:44:27 +01:00
bcm2835-dma.c	dmaengine: bcm2835-dma: Convert to use DMA pool	2015-12-05 15:36:32 +05:30
coh901318.c	dmaengine: Add an enum for the dmaengine alignment constraints	2015-08-05 10:53:52 +05:30
coh901318.h
coh901318_lli.c
cppi41.c	dmaengine: cppi41: add missing bitfields	2015-04-11 21:12:58 +05:30
dma-axi-dmac.c	dmaengine: Add support for the Analog Devices AXI-DMAC DMA controller	2015-08-23 18:55:10 +05:30
dma-jz4740.c	dmaengine: jz4740: disable/unprepare clk if probe fails	2018-02-25 11:03:41 +01:00
dma-jz4780.c	dmaengine: dma-jz4780: Return error if not probed from DT	2018-11-21 09:27:33 +01:00
dmaengine.c	dmaengine: Fix array index out of bounds warning in __get_unmap_pool()	2017-12-20 10:04:54 +01:00
dmaengine.h
dmatest.c	dmaengine: dmatest: Abort test in case of mapping error	2019-03-23 08:44:27 +01:00
edma.c	dmaengine: edma: Align the memcpy acnt array size with the transfer	2017-10-18 09:20:41 +02:00
ep93xx_dma.c	dmaengine: ep93xx: Always start from BASE0	2017-06-14 13:16:22 +02:00
fsl-edma.c	dmaengine: fsl-edma: clear pending interrupts on initialization	2015-06-25 09:22:32 +05:30
fsl_raid.c	dmaengine: fsl_raid: statify fsl_re_chan_probe	2015-04-02 16:11:35 +05:30
fsl_raid.h	dmaengine: Driver support for FSL RaidEngine device.	2015-04-02 16:10:27 +05:30
fsldma.c	dmaengine: fsldma: Fix module autoload for OF platform driver	2015-10-01 07:34:31 +05:30
fsldma.h	dmaengine: fsldma: declare slave capabilities for the generic code	2015-01-13 23:58:08 +05:30
idma64.c	dmaengine updates for 4.4-rc1	2015-11-10 10:05:17 -08:00
idma64.h	dmaengine: idma64: use lo_hi_readq() / lo_hi_writeq()	2015-09-25 07:54:05 +05:30
img-mdc-dma.c	dmaengine: img-mdc: remove device_alloc_chan_resources handler	2015-03-18 22:44:58 +05:30
imx-dma.c	dmaengine: imx-dma: fix warning comparison of distinct pointer types	2019-04-27 09:33:52 +02:00
imx-sdma.c	dmaengine: imx-sdma: Handle return value of clk_prepare_enable	2018-04-13 19:50:14 +02:00
iop-adma.c	drivers/dma/iop-adma: Use dma_alloc_writecombine() kernel-style	2015-08-25 09:59:46 +02:00
k3dma.c	dmaengine: k3dma: Off by one in k3_of_dma_simple_xlate()	2018-08-24 13:26:57 +02:00
Kconfig	Merge branch 'topic/idma' into for-linus	2015-10-31 07:37:05 +05:30
lpc18xx-dmamux.c	dmaengine: add driver for lpc18xx dmamux	2015-08-18 22:12:14 +05:30
Makefile	dmaengine: idma: rename to INTEL_IDMA64	2015-09-24 20:55:58 +05:30
mic_x100_dma.c	dmaengine: Revert "dmaengine: mic_x100: add missing spin_unlock"	2016-01-06 15:16:36 +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: Add an enum for the dmaengine alignment constraints	2015-08-05 10:53:52 +05:30
mmp_tdma.c	dmaengine: Add an enum for the dmaengine alignment constraints	2015-08-05 10:53:52 +05:30
moxart-dma.c	dmaengine: moxart-dma: Fix module autoload for OF platform driver	2015-10-01 07:34:31 +05:30
mpc512x_dma.c	dmaengine: mpc512x: Fix module autoload for OF platform driver	2015-10-01 07:34:31 +05:30
mv_xor.c	dmaengine updates for 4.3-rc1	2015-09-04 11:10:18 -07:00
mv_xor.h	dmaengine: mv_xor: improve descriptors list handling and reduce locking	2015-06-10 22:18:31 +05:30
mxs-dma.c	dmaengine: mxs: Constify platform_device_id	2015-05-04 16:38:55 +05:30
nbpfaxi.c	dmaengine: nbpfaxi: Constify platform_device_id	2015-05-04 16:38:55 +05:30
of-dma.c	dmaengine: of_dma: Support for DMA routers	2015-05-09 17:11:25 +05:30
omap-dma.c	dmaengine: omap-dma: Enable packed accesses for cyclic transfers	2015-10-05 16:31:34 +01:00
pch_dma.c	dmaengine: Remove remaining FSF mailing addresses	2015-07-06 19:18:53 +05:30
pl330.c	dmaengine: pl330: fix irq race with terminate_all	2018-09-26 08:35:05 +02:00
pxa_dma.c	dmaengine: pxa_dma: remove duplicate const qualifier	2018-08-06 16:24:40 +02:00
qcom_bam_dma.c	Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma	2015-04-24 09:49:37 -07:00
s3c24xx-dma.c	dmaengine: s3c24xx: Constify platform_device_id	2015-05-04 16:38:55 +05:30
sa11x0-dma.c	dmaengine: sa11x0: report slave capabilities to upper layers	2015-04-17 23:24:35 +05:30
sirf-dma.c	dmaengine: sirf: Fix module autoload for OF platform driver	2015-10-01 07:34:31 +05:30
ste_dma40.c	dmaengine: ste_dma40: fix a trivial typo	2015-10-25 04:15:40 +05:30
ste_dma40_ll.c
ste_dma40_ll.h
sun4i-dma.c	dmaengine: sun4i: fix unsafe list iteration	2015-09-30 12:17:22 +05:30
sun6i-dma.c	dmaengine: sun6i: Fix module autoload for OF platform driver	2015-10-01 07:35:26 +05:30
tegra20-apb-dma.c	dmaengine: tegra: avoid overflow of byte tracking	2019-04-27 09:33:53 +02:00
ti-dma-crossbar.c	dmaengine: ti-dma-crossbar: Fix event mapping for TPCC_EVT_MUX_60_63	2018-03-24 10:58:48 +01:00
timb_dma.c	dmaengine: Remove remaining FSF mailing addresses	2015-07-06 19:18:53 +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: txx9: Rename device_control	2014-12-22 12:33:22 +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	Revert "dmaengine: virt-dma: don't always free descriptor upon completion"	2015-07-31 20:33:43 +05:30
virt-dma.h	dmaengine: virt-dma: Fix kernel-doc annotations	2015-10-27 11:12:09 +09:00
xgene-dma.c	dmaengine: xgene-dma: Fix double IRQ issue by setting IRQ_DISABLE_UNLAZY flag	2016-01-07 11:09:36 +05:30
zx296702_dma.c	dmaengine: zx: fix build warning	2018-02-25 11:03:50 +01:00