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Nicolas Ferre 17a766decb dmaengine: at_hdmac: remove clear-on-read in atc_dostart() 
commit ed8b0d67f3 upstream.

This loop on EBCISR register was designed to clear IRQ sources before enabling
a DMA channel. This register is clear-on-read so a race condition can appear if
another channel is already active and has just finished its transfer.
Removing this read on EBCISR is fixing the issue as there is no case where an IRQ
could be pending: we already make sure that this register is drained at probe()
time and during resume.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-07 08:56:33 -07:00
..
ioat Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx 2011-05-28 12:35:15 -07:00
ipu dma: Ipu: Convert interupt code 2011-03-25 22:09:00 +01:00
ppc4xx Merge branch 'old_next' into next 2011-04-06 11:51:12 +05:30
amba-pl08x.c ARM: amba: make probe() functions take const id tables 2011-02-23 16:24:14 +00:00
at_hdmac.c dmaengine: at_hdmac: remove clear-on-read in atc_dostart() 2012-05-07 08:56:33 -07:00
at_hdmac_regs.h at_hdmac: bugfix for enabling channel irq 2012-02-13 11:06:07 -08:00
coh901318.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx 2011-05-28 12:35:15 -07:00
coh901318_lli.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
coh901318_lli.h tree-wide: Assorted spelling fixes 2010-02-09 11:13:56 +01:00
dmaengine.c async_tx: make async_tx channel switching opt-in 2010-10-07 17:08:32 -07:00
dmatest.c Haavard Skinnemoen has left Atmel 2011-05-18 23:24:50 +02:00
dw_dmac.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx 2011-05-28 12:35:15 -07:00
dw_dmac_regs.h dmaengine/dw_dmac: Update maintainer-ship 2011-05-25 18:30:37 +05:30
fsldma.c dt/fsldma: fix build warning caused by of_platform_device changes 2011-04-10 23:34:38 -07:00
fsldma.h fsldma: fix controller lockups 2011-03-11 17:52:36 -08:00
imx-dma.c dmaengine i.MX dma: initialize dma capabilities outside channel loop 2011-01-31 12:36:23 +01:00
imx-sdma.c Merge branch 'imx' into dmaengine-fixes 2011-02-14 02:40:46 -08:00
intel_mid_dma.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx 2011-05-28 12:35:15 -07:00
intel_mid_dma_regs.h Fix common misspellings 2011-03-31 11:26:23 -03:00
iop-adma.c dma: use BUG_ON correctly in iop-adma.c, v4 2011-03-31 11:07:40 +05:30
iovlock.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
Kconfig pch_dma: Support new device LAPIS Semiconductor ML7831 IOH 2012-04-22 16:21:44 -07:00
Makefile Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx 2011-03-22 17:53:13 -07:00
mpc512x_dma.c Fix common misspellings 2011-03-31 11:26:23 -03:00
mv_xor.c dma: use BUG_ON correctly in mv_xor.c, v4 2011-03-31 11:07:40 +05:30
mv_xor.h mv_xor: implement a private tx_list 2009-09-08 17:53:03 -07:00
mxs-dma.c dmaengine: mxs-dma: add dma support for i.MX23/28 2011-03-02 07:06:27 +05:30
pch_dma.c pch_dma: Support new device LAPIS Semiconductor ML7831 IOH 2012-04-22 16:21:44 -07:00
pl330.c ARM: amba: make probe() functions take const id tables 2011-02-23 16:24:14 +00:00
shdma.c dmaengine: shdma: SH_DMAC_MAX_CHANNELS message fix 2011-06-14 15:03:07 +09:00
shdma.h dmaengine: shdma: Update SH_DMAC_MAX_CHANNELS to 20 2011-05-25 11:36:17 +09:00
ste_dma40.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx 2011-05-28 12:35:15 -07:00
ste_dma40_ll.c dma40: cyclic xfer support 2011-01-30 22:27:21 -08:00
ste_dma40_ll.h dma40: cyclic xfer support 2011-01-30 22:27:21 -08:00
timb_dma.c mfd: Use mfd cell platform_data for timberdale cells platform bits 2011-05-26 19:45:05 +02:00
TODO dmaengine: add TODO items for future work on dma drivers 2011-05-26 14:44:30 -07:00
txx9dmac.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx 2010-05-21 17:05:46 -07:00
txx9dmac.h txx9dmac: implement a private tx_list 2009-09-08 17:53:03 -07:00