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authorLudovic Desroches <ludovic.desroches@atmel.com>2013-04-18 09:52:59 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2013-04-18 17:54:22 +0200
commitd202f05158442396033f416df376f8ece1f563df (patch)
tree1c08c8128ac638606af144eec1338c864310a3d4 /kernel
parentMerge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/... (diff)
downloadlinux-d202f05158442396033f416df376f8ece1f563df.tar.xz
linux-d202f05158442396033f416df376f8ece1f563df.zip
dmaengine: at_hdmac: fix race condition in atc_advance_work()
The BUG_ON() directive is triggered probably due to a latency modification following inclusion of commit c10d73671ad3 ("softirq: reduce latencies"). This condition has not been met before 3.9-rc1 and doesn't trigger without this patch. We now make sure that DMA channel is idle before calling atc_complete_all() which makes the BUG_ON() "protection" useless. Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
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