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[2/2] ALSA: pcm: Add cond_resched() in OSS read/write loop

Message ID 20180406133412.10649-2-tiwai@suse.de (mailing list archive)
State New, archived
Headers show

Commit Message

Takashi Iwai April 6, 2018, 1:34 p.m. UTC 
The PCM OSS read/write loops may take too long occasionally when a
huge size of data is given.  Add cond_resched() to become more system-
friendlier.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/core/oss/pcm_oss.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index 5e009a444d9d..54984119c0b3 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -1452,6 +1452,7 @@  static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const cha
 			break;
 		}
 		tmp = 0;
+		cond_resched();
 	}
 	atomic_dec(&runtime->oss.rw_ref);
 	return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
@@ -1547,6 +1548,7 @@  static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __use
 			break;
 		}
 		tmp = 0;
+		cond_resched();
 	}
 	atomic_dec(&runtime->oss.rw_ref);
 	return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;