[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>
diff --git a/sound/pci/echoaudio/echoaudio_dsp.c b/sound/pci/echoaudio/echoaudio_dsp.c
index 42afa83..e6c1007 100644
--- a/sound/pci/echoaudio/echoaudio_dsp.c
+++ b/sound/pci/echoaudio/echoaudio_dsp.c
@@ -43,11 +43,11 @@
{
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);