From f48f606d9f85a8b25c716082c73c36e9ff6f0cde Mon Sep 17 00:00:00 2001 From: Jaroslav Kysela Date: Tue, 11 May 2010 12:10:47 +0200 Subject: [PATCH] [ALSA] snd-hda-intel: Improve azx_position_ok() Add back the zero return value (activate workqueue) when bdl_pos_adj is nonzero for position check. Do the position related check only for first next period using wallclk counter. Return -1 value (ignore interrupt) when period_bytes variable is zero. Signed-off-by: Jaroslav Kysela --- sound/pci/hda/hda_intel.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index 0a6c55b..170610e 100644 --- a/sound/pci/hda/hda_intel.c +++ b/sound/pci/hda/hda_intel.c @@ -1890,9 +1890,8 @@ static int azx_position_ok(struct azx *chip, struct azx_dev *azx_dev) unsigned int pos; int stream; - wallclk = azx_readl(chip, WALLCLK); - if ((wallclk - azx_dev->start_wallclk) < - (azx_dev->period_wallclk * 2) / 3) + wallclk = azx_readl(chip, WALLCLK) - azx_dev->start_wallclk; + if (wallclk < (azx_dev->period_wallclk * 2) / 3) return -1; /* bogus (too early) interrupt */ stream = azx_dev->substream->stream; @@ -1910,9 +1909,11 @@ static int azx_position_ok(struct azx *chip, struct azx_dev *azx_dev) if (WARN_ONCE(!azx_dev->period_bytes, "hda-intel: zero azx_dev->period_bytes")) - return 0; /* this shouldn't happen! */ - if (pos % azx_dev->period_bytes > azx_dev->period_bytes / 2) - return 0; /* NG - it's below the period boundary */ + return -1; /* this shouldn't happen! */ + if (wallclk <= azx_dev->period_wallclk && + pos % azx_dev->period_bytes > azx_dev->period_bytes / 2) + /* NG - it's below the first next period boundary */ + return bdl_pos_adj[chip->dev_index] ? 0 : -1; azx_dev->start_wallclk = wallclk; return 1; /* OK, it's fine */ } -- 2.7.4