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authorGiuliano Pochini <pochini@shiny.it>2007-09-17 12:49:40 +0200
committerJaroslav Kysela <perex@perex.cz>2007-10-16 16:50:38 +0200
commit22d3a20030439420bf2795c60529ba0e89b4d82c (patch)
treeeed3a36c5510b6d5bb15aae536bf841da0ee2c49
parent11370ee2c1c578a704f47d5513d57274c335db43 (diff)
[ALSA] echoaudio - Add barrier() to prevent compiler optimization
This patch adds a barrier() to prevent the compiler from moving the read outside of the loop. It also fixes a comment. Signed-off-by: Giuliano Pochini <pochini@shiny.it> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
-rw-r--r--sound/pci/echoaudio/echoaudio_dsp.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/sound/pci/echoaudio/echoaudio_dsp.c b/sound/pci/echoaudio/echoaudio_dsp.c
index 42afa837d9b..e6c10077039 100644
--- a/sound/pci/echoaudio/echoaudio_dsp.c
+++ b/sound/pci/echoaudio/echoaudio_dsp.c
@@ -43,11 +43,11 @@ static int wait_handshake(struct echoaudio *chip)
{
int i;
- /* Wait up to 10ms for the handshake from the DSP */
+ /* Wait up to 20ms for the handshake from the DSP */
for (i = 0; i < HANDSHAKE_TIMEOUT; i++) {
/* Look for the handshake value */
+ barrier();
if (chip->comm_page->handshake) {
- /*if (i) DE_ACT(("Handshake time: %d\n", i));*/
return 0;
}
udelay(1);