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| author | Takashi Iwai <tiwai@suse.de> | 2008-03-18 09:47:06 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2008-04-24 12:00:26 +0200 |
| commit | 2add9b925394746eff692ff0875d21ea2d5289e2 (patch) | |
| tree | 4ce428c5fec4e471726024c4de733c437315276a | |
| parent | 86d34b7ec878ea4b4c9f33ce92f1722c4326dbe7 (diff) | |
| download | linux-3.10-2add9b925394746eff692ff0875d21ea2d5289e2.tar.gz linux-3.10-2add9b925394746eff692ff0875d21ea2d5289e2.tar.bz2 linux-3.10-2add9b925394746eff692ff0875d21ea2d5289e2.zip | |
[ALSA] hda-intel - Add barrier
Add proper barriers in the RIRB communication code.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
| -rw-r--r-- | sound/pci/hda/hda_intel.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 9a20fb1bef4..557f269f83a 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -536,8 +536,9 @@ static void azx_update_rirb(struct azx *chip) if (res_ex & ICH6_RIRB_EX_UNSOL_EV) snd_hda_queue_unsol_event(chip->bus, res, res_ex); else if (chip->rirb.cmds) { - chip->rirb.cmds--; chip->rirb.res = res; + smp_wmb(); + chip->rirb.cmds--; } } } @@ -556,8 +557,10 @@ static unsigned int azx_rirb_get_response(struct hda_codec *codec) azx_update_rirb(chip); spin_unlock_irq(&chip->reg_lock); } - if (!chip->rirb.cmds) + if (!chip->rirb.cmds) { + smp_rmb(); return chip->rirb.res; /* the last value */ + } if (time_after(jiffies, timeout)) break; if (codec->bus->needs_damn_long_delay) |