Commit db474931 authored by Leonid Ravich's avatar Leonid Ravich Committed by Vinod Koul
Browse files

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: default avatarDave Jiang <dave.jiang@intel.com>
Signed-off-by: default avatarLeonid Ravich <Leonid.Ravich@emc.com>
Link: https://lore.kernel.org/r/1587589761-32690-3-git-send-email-leonid.ravich@dell.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 2baedcb6

drivers/dma/ioat/dma.c

+9 −0
Original line number Diff line number Diff line
@@ -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: