lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[ALSA] echoaudio - Add barrier() to prevent compiler optimization

Browse Source 
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>
This commit is contained in:
Giuliano Pochini
2007-09-17 12:49:40 +02:00
committed by Jaroslav Kysela
parent 11370ee2c1
commit 22d3a20030
1 changed files with 2 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
sound/pci/echoaudio/echoaudio_dsp.c
View File

@@ -43,11 +43,11 @@ static int wait_handshake(struct echoaudio *chip)
{ {
int i; 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++) { for (i = 0; i < HANDSHAKE_TIMEOUT; i++) {
/* Look for the handshake value */ /* Look for the handshake value */
barrier();
if (chip->comm_page->handshake) { if (chip->comm_page->handshake) {
/*if (i) DE_ACT(("Handshake time: %d\n", i));*/
return 0; return 0;
} }
udelay(1); udelay(1);