From mboxrd@z Thu Jan 1 00:00:00 1970 From: thomas.petazzoni@free-electrons.com (Thomas Petazzoni) Date: Tue, 12 May 2015 17:51:17 +0200 Subject: [PATCH 5/8] dmaengine: mv_xor: bug fix for racing condition in descriptors cleanup In-Reply-To: <1431445063-20226-6-git-send-email-maxime.ripard@free-electrons.com> References: <1431445063-20226-1-git-send-email-maxime.ripard@free-electrons.com> <1431445063-20226-6-git-send-email-maxime.ripard@free-electrons.com> Message-ID: <20150512175117.1eaff739@free-electrons.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Maxime, On Tue, 12 May 2015 17:37:40 +0200, Maxime Ripard wrote: > From: Lior Amsalem > > This patch fixes a bug in the XOR driver where the cleanup function can be > called and free descriptors that never been processed by the engine (which > result in data errors). > > The cleanup function will free descriptors based on the ownership bit in > the descriptors. > > Signed-off-by: Lior Amsalem > Reviewed-by: Ofer Heifetz > Signed-off-by: Maxime Ripard If this is fixing a bug, shouldn't it be Cc'ed to stable@ ? But then it needs to be the first patch in the series. >>From what I remember, this series both fixes some issues *and* adds RAID6 support. We need to separate out the two things so that the fixes can be propagated to stable. Thanks, Thomas -- Thomas Petazzoni, CTO, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com