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author | Takashi Iwai <tiwai@suse.de> | 2016-03-08 09:49:43 (GMT) |
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committer | Takashi Iwai <tiwai@suse.de> | 2016-03-08 09:49:43 (GMT) |
commit | 56d94d70398f0fbb1863a03a145db1a86f009a71 (patch) | |
tree | 9e52dc537f8f8359c70b66f5000192bb280b41b9 /drivers/dma/ioat/dma.c | |
parent | bb63f726f98bec032c7322a9c36eb4167307d856 (diff) | |
parent | fc4f000bf8c0cbf38f44de6bd5e225574e572ed4 (diff) | |
download | linux-56d94d70398f0fbb1863a03a145db1a86f009a71.tar.xz |
Merge branch 'topic/hda' into for-next
Diffstat (limited to 'drivers/dma/ioat/dma.c')
-rw-r--r-- | drivers/dma/ioat/dma.c | 34 |
1 files changed, 22 insertions, 12 deletions
diff --git a/drivers/dma/ioat/dma.c b/drivers/dma/ioat/dma.c index 1d5df2e..21539d5 100644 --- a/drivers/dma/ioat/dma.c +++ b/drivers/dma/ioat/dma.c @@ -861,32 +861,42 @@ void ioat_timer_event(unsigned long data) return; } + spin_lock_bh(&ioat_chan->cleanup_lock); + + /* handle the no-actives case */ + if (!ioat_ring_active(ioat_chan)) { + 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; + } + /* if we haven't made progress and we have already * acknowledged a pending completion once, then be more * forceful with a restart */ - spin_lock_bh(&ioat_chan->cleanup_lock); if (ioat_cleanup_preamble(ioat_chan, &phys_complete)) __cleanup(ioat_chan, phys_complete); else if (test_bit(IOAT_COMPLETION_ACK, &ioat_chan->state)) { + u32 chanerr; + + chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET); + dev_warn(to_dev(ioat_chan), "Restarting channel...\n"); + dev_warn(to_dev(ioat_chan), "CHANSTS: %#Lx CHANERR: %#x\n", + status, chanerr); + dev_warn(to_dev(ioat_chan), "Active descriptors: %d\n", + ioat_ring_active(ioat_chan)); + spin_lock_bh(&ioat_chan->prep_lock); ioat_restart_channel(ioat_chan); spin_unlock_bh(&ioat_chan->prep_lock); spin_unlock_bh(&ioat_chan->cleanup_lock); return; - } else { + } else set_bit(IOAT_COMPLETION_ACK, &ioat_chan->state); - mod_timer(&ioat_chan->timer, jiffies + COMPLETION_TIMEOUT); - } - - if (ioat_ring_active(ioat_chan)) - mod_timer(&ioat_chan->timer, jiffies + COMPLETION_TIMEOUT); - else { - spin_lock_bh(&ioat_chan->prep_lock); - check_active(ioat_chan); - spin_unlock_bh(&ioat_chan->prep_lock); - } + mod_timer(&ioat_chan->timer, jiffies + COMPLETION_TIMEOUT); spin_unlock_bh(&ioat_chan->cleanup_lock); } |