From: Jaroslav Kysela <perex@perex.cz>
Date: Tue, 16 Nov 2004 15:05:49 +0000 (+0000)
Subject: appl_ptr sync fix when status/control structures are not mmaped
X-Git-Tag: v1.0.8~33
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=6987a8555ca50f10d6c629d1e2bc1ef5ee8b6260;p=alsa-lib.git

appl_ptr sync fix when status/control structures are not mmaped
The prepare and reset ioctls can modify appl_ptr, thus the user space
must take modified appl_ptr from driver.
---

diff --git a/src/pcm/pcm_hw.c b/src/pcm/pcm_hw.c
index c20a350c..ec888100 100644
--- a/src/pcm/pcm_hw.c
+++ b/src/pcm/pcm_hw.c
@@ -535,7 +535,7 @@ static int snd_pcm_hw_prepare(snd_pcm_t *pcm)
 		SYSERR("SNDRV_PCM_IOCTL_PREPARE failed");
 		return err;
 	}
-	return sync_ptr(hw, 0);
+	return sync_ptr(hw, SNDRV_PCM_SYNC_PTR_APPL);
 }
 
 static int snd_pcm_hw_reset(snd_pcm_t *pcm)
@@ -547,7 +547,7 @@ static int snd_pcm_hw_reset(snd_pcm_t *pcm)
 		SYSERR("SNDRV_PCM_IOCTL_RESET failed");
 		return err;
 	}
-	return sync_ptr(hw, 0);
+	return sync_ptr(hw, SNDRV_PCM_SYNC_PTR_APPL);
 }
 
 static int snd_pcm_hw_start(snd_pcm_t *pcm)