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authorLeonid Ravich <Leonid.Ravich@emc.com>2020-04-22 23:09:18 +0200
committerVinod Koul <vkoul@kernel.org>2020-04-23 09:21:45 +0200
commitdb474931df3eb54edbf761b8c98ba517bdf24463 (patch)
treebcf4d34d9ae186bfbd72071dac992a2132274d1a /drivers/dma/ioat/dma.c
parentdmaengine: ioat: remove unnesesery double complition timer modification. (diff)
downloadlinux-db474931df3eb54edbf761b8c98ba517bdf24463.tar.xz
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dmaengine: ioat: adding missed issue_pending to timeout handler
completion timeout might trigger unnesesery DMA engine hw reboot in case of missed issue_pending() . Acked-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Leonid Ravich <Leonid.Ravich@emc.com> Link: https://lore.kernel.org/r/1587589761-32690-3-git-send-email-leonid.ravich@dell.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/ioat/dma.c')
-rw-r--r--drivers/dma/ioat/dma.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/dma/ioat/dma.c b/drivers/dma/ioat/dma.c
index 55a8cf181816..8ad0ad861c86 100644
--- a/drivers/dma/ioat/dma.c
+++ b/drivers/dma/ioat/dma.c
@@ -955,6 +955,15 @@ void ioat_timer_event(struct timer_list *t)
goto unlock_out;
}
+ /* handle missed issue pending case */
+ if (ioat_ring_pending(ioat_chan)) {
+ dev_warn(to_dev(ioat_chan),
+ "Completion timeout with pending descriptors\n");
+ spin_lock_bh(&ioat_chan->prep_lock);
+ __ioat_issue_pending(ioat_chan);
+ spin_unlock_bh(&ioat_chan->prep_lock);
+ }
+
set_bit(IOAT_COMPLETION_ACK, &ioat_chan->state);
mod_timer(&ioat_chan->timer, jiffies + COMPLETION_TIMEOUT);
unlock_out: