From: Takashi Iwai <tiwai@suse.de>
Date: Fri, 4 Aug 2006 18:37:33 +0000 (+0200)
Subject: ALSA: Don't reject O_RDWR at opening PCM OSS
X-Git-Tag: v2.6.17.8~1
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a2f4638207875fb0a164cd39f16174ef794a1906;p=thirdparty%2Fkernel%2Fstable.git

ALSA: Don't reject O_RDWR at opening PCM OSS

Accept O_RDWR at opening a PCM OSS device that is read- or write-only,
just for the compatibility with the behavior of older versions.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index ac990bf0b48f7..785a2acd9adf3 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -1745,6 +1745,8 @@ static int snd_pcm_oss_open_file(struct file *file,
 	for (idx = 0; idx < 2; idx++) {
 		if (setup[idx].disable)
 			continue;
+		if (! pcm->streams[idx].substream_count)
+			continue; /* no matching substream */
 		if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
 			if (! (f_mode & FMODE_WRITE))
 				continue;