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754416e10b
linux/drivers/dma
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Sebastian Andrzej Siewior 754416e10b dma: cppi41: add a delay while setting the TD bit 
The manual says that we need to (repeatedly) set the TearDown-bit for
the endpoint in order to get the active transfer descriptor released.
Doing this "real" quick over and over again seems to work but it also
seems that the hardware might not have enough time to breathe. So I
though, hey lets add a udelay() between between the individual sets
of the bit.
This change with the g_zero testcase resulted in a warning about missing
transfer descriptor (we got the tear-down one). It seems that if the
hardware has some time it manages to release the transfer-descriptor on
the completion queue after the teaddown descriptor.
With this change, I observe that the transfer descriptor is released
after 20-30 retry loops.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2014-12-09 14:45:41 +05:30
..
bestcomm drivers: clean-up prom.h implicit includes 2013-10-09 20:04:04 -05:00
dw dmaengine: dw: export probe()/remove() and Co to users 2014-10-15 20:31:05 +05:30
ioat net_dma: simple removal 2014-09-28 07:05:16 -07:00
ipu dmaengine: ipu: use return value of request_irq 2014-07-25 15:39:50 +05:30
ppc4xx Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma 2014-01-29 20:27:23 -08:00
sh dmaengine: shdma: fix a race condition in __ld_cleanup() 2014-11-17 13:50:42 +05:30
xilinx dmaengine: xilinx: vdma: icg should be difference of stride and hsize 2014-11-06 13:11:47 +05:30
acpi-dma.c acpi-dma: convert to return error code when asked for channel 2014-02-11 23:30:50 +05:30
amba-pl08x.c dmaengine: pl08x: Remove chancnt affectations 2014-11-06 11:32:44 +05:30
at_hdmac_regs.h dmaengine: at_hdmac: remove unused function 2013-12-12 22:43:41 -08:00
at_hdmac.c dma: at_hdmac: fix invalid remaining bytes detection 2014-08-07 21:52:27 +05:30
at_xdmac.c dmaengine: at_xdmac: Add DMA_PRIVATE 2014-11-17 14:07:21 +05:30
bcm2835-dma.c dmaengine: Remove .owner field for driver 2014-11-06 11:54:18 +05:30
coh901318_lli.c Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma 2013-02-26 09:24:48 -08:00
coh901318.c dmaengine: coh901318: use dmaengine_terminate_all() API 2014-10-15 21:30:59 +05:30
coh901318.h dma: coh901318: merge header files 2013-01-07 17:36:37 +01:00
cppi41.c dma: cppi41: add a delay while setting the TD bit 2014-12-09 14:45:41 +05:30
dma-jz4740.c dmaengine: Remove .owner field for driver 2014-11-06 11:54:18 +05:30
dmaengine.c dmaengine-3.17 2014-10-07 20:39:25 -04:00
dmaengine.h
dmatest.c dmaengine-3.17 2014-10-07 20:39:25 -04:00
edma.c dmaengine: edma: check for echan->edesc => NULL in edma_dma_pause() 2014-10-15 20:55:04 +05:30
ep93xx_dma.c dmaengine: Remove the context argument to the prep_dma_cyclic operation 2014-08-04 13:41:50 +05:30
fsl-edma.c dmaengine: fsl-edma: fixup reg offset and hw S/G support in big-endian model 2014-12-09 14:41:58 +05:30
fsldma.c dmaengine: fsldma: Remove chancnt affectations 2014-11-06 11:32:45 +05:30
fsldma.h dmaengine: Freescale: change descriptor release process for supporting async_tx 2014-07-14 21:32:18 +05:30
imx-dma.c dmaengine: Remove the context argument to the prep_dma_cyclic operation 2014-08-04 13:41:50 +05:30
imx-sdma.c dma: imx-sdma: clarify about firmware not found error 2014-12-05 23:18:53 +05:30
intel_mid_dma_regs.h
intel_mid_dma.c dmaengine: intel_mid_dma: use DMA_COMPLETE for dma completion status 2013-10-25 11:16:04 +05:30
iop-adma.c dmaengine: Remove .owner field for driver 2014-11-06 11:54:18 +05:30
k3dma.c dmaengine: k3dma: Add CONFIG_PM_SLEEP to suspend/resume functions 2014-11-17 13:50:45 +05:30
Kconfig Merge branch 'topic/at_xdmac' into for-linus 2014-12-05 19:31:32 +05:30
Makefile dmaengine: at_xdmac: creation of the atmel eXtended DMA Controller driver 2014-11-06 11:00:08 +05:30
mic_x100_dma.c dma: MIC X100 DMA Driver 2014-07-12 09:57:42 -07:00
mic_x100_dma.h dma: MIC X100 DMA Driver 2014-07-12 09:57:42 -07:00
mmp_pdma.c dmaengine: Remove .owner field for driver 2014-11-06 11:54:18 +05:30
mmp_tdma.c dmaengine: Remove .owner field for driver 2014-11-06 11:54:18 +05:30
moxart-dma.c dmaengine: Add MOXA ART DMA engine driver 2014-01-20 12:32:46 +05:30
mpc512x_dma.c dmaengine: Remove .owner field for driver 2014-11-06 11:54:18 +05:30
mv_xor.c Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma 2014-10-18 18:11:04 -07:00
mv_xor.h dma: mv_xor: Add support for DMA_INTERRUPT 2014-09-23 20:17:01 +05:30
mxs-dma.c dmaengine: Remove the context argument to the prep_dma_cyclic operation 2014-08-04 13:41:50 +05:30
nbpfaxi.c dmaengine: Remove .owner field for driver 2014-11-06 11:54:18 +05:30
of-dma.c dmaengine: of: add common xlate function for matching by channel id 2014-07-26 00:21:41 +05:30
omap-dma.c dmaengine: omap: Remove chancnt affectations 2014-11-06 11:32:45 +05:30
pch_dma.c drivers/dma/pch_dma: declare pch_dma_id_table as static 2014-12-05 23:28:30 +05:30
pl330.c dmaengine: pl330: update author info 2014-12-05 21:04:22 +05:30
qcom_bam_dma.c dmaengine: qcom_bam_dma: Add BAM v1.3.0 support 2014-11-17 13:50:40 +05:30
s3c24xx-dma.c dmaengine: Remove .owner field for driver 2014-11-06 11:54:18 +05:30
sa11x0-dma.c dmaengine: sa11x0: Remove chancnt affectations 2014-11-06 11:32:45 +05:30
sirf-dma.c dmaengine: sirf: Add CONFIG_PM_SLEEP to suspend/resume functions 2014-11-17 13:50:44 +05:30
ste_dma40_ll.c dmaengine: ste_dma40_ll: Replace meaningless register set with comment 2013-06-04 11:12:10 +02:00
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 dmaengine: ste_dma40: fix error return code 2014-12-05 23:25:48 +05:30
sun6i-dma.c dmaengine: sun6i: Add support for Allwinner A23 (sun8i) variant 2014-11-17 13:50:37 +05:30
tegra20-apb-dma.c dmaengine: Remove .owner field for driver 2014-11-06 11:54:18 +05:30
timb_dma.c dmaengine: Remove .owner field for driver 2014-11-06 11:54:18 +05:30
TODO dmaengine: dw: don't perform DMA when dmaengine_submit is called 2014-07-15 22:14:30 +05:30
txx9dmac.c dma: fix build warnings in txx9 2013-12-12 22:43:41 -08:00
txx9dmac.h
virt-dma.c
virt-dma.h dma: fix vchan_cookie_complete() debug print 2014-01-26 17:33:45 +05:30