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| author | Leonid Ravich <Leonid.Ravich@emc.com> | 2020-04-23 00:09:17 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-04-23 12:51:45 +0530 |
| commit | 2baedcb6a637ba6a5d626a58cf37aecd6db16ef0 (patch) | |
| tree | 17647973152f55a5de881c2945758446b2d1fce4 /drivers/dma/ioat | |
| parent | 5a87c506ed7690091327be752a858634b88f6034 (diff) | |
| download | lwn-2baedcb6a637ba6a5d626a58cf37aecd6db16ef0.tar.gz lwn-2baedcb6a637ba6a5d626a58cf37aecd6db16ef0.zip | |
dmaengine: ioat: remove unnesesery double complition timer modification.
removing unnecessary mod_timer from timeout handler
incase of ioat_cleanup_preamble() is true for cleaner code
Acked-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Leonid Ravich <Leonid.Ravich@emc.com>
Link: https://lore.kernel.org/r/1587589761-32690-2-git-send-email-leonid.ravich@dell.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/ioat')
| -rw-r--r-- | drivers/dma/ioat/dma.c | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/drivers/dma/ioat/dma.c b/drivers/dma/ioat/dma.c index da59b2848252..55a8cf181816 100644 --- a/drivers/dma/ioat/dma.c +++ b/drivers/dma/ioat/dma.c @@ -922,17 +922,23 @@ void ioat_timer_event(struct timer_list *t) spin_lock_bh(&ioat_chan->prep_lock); check_active(ioat_chan); spin_unlock_bh(&ioat_chan->prep_lock); - spin_unlock_bh(&ioat_chan->cleanup_lock); - return; + goto unlock_out; + } + + /* handle the missed cleanup case */ + if (ioat_cleanup_preamble(ioat_chan, &phys_complete)) { + /* timer restarted in ioat_cleanup_preamble + * and IOAT_COMPLETION_ACK cleared + */ + __cleanup(ioat_chan, phys_complete); + goto unlock_out; } /* if we haven't made progress and we have already * acknowledged a pending completion once, then be more * forceful with a restart */ - if (ioat_cleanup_preamble(ioat_chan, &phys_complete)) - __cleanup(ioat_chan, phys_complete); - else if (test_bit(IOAT_COMPLETION_ACK, &ioat_chan->state)) { + if (test_bit(IOAT_COMPLETION_ACK, &ioat_chan->state)) { u32 chanerr; chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET); @@ -945,12 +951,13 @@ void ioat_timer_event(struct timer_list *t) ioat_ring_active(ioat_chan)); ioat_reboot_chan(ioat_chan); - spin_unlock_bh(&ioat_chan->cleanup_lock); - return; - } else - set_bit(IOAT_COMPLETION_ACK, &ioat_chan->state); + goto unlock_out; + } + + set_bit(IOAT_COMPLETION_ACK, &ioat_chan->state); mod_timer(&ioat_chan->timer, jiffies + COMPLETION_TIMEOUT); +unlock_out: spin_unlock_bh(&ioat_chan->cleanup_lock); } |