redonkable/alistair23-linux
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drm: count reaches -1

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With a postfix decrement in the test count will reach -1 rather than 0,
subsequent tests fail.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Roel Kluin 2009-04-16 22:57:46 +02:00 committed by Dave Airlie
parent 029a2edbd3
commit d9c6f54646
1 changed files with 7 additions and 5 deletions
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12
drivers/gpu/drm/via/via_dma.c
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@ -481,11 +481,13 @@ static int via_wait_idle(drm_via_private_t * dev_priv)
{
int count = 10000000;
while (!(VIA_READ(VIA_REG_STATUS) & VIA_VR_QUEUE_BUSY) && count--);
while (!(VIA_READ(VIA_REG_STATUS) & VIA_VR_QUEUE_BUSY) && --count)
;
while (count-- && (VIA_READ(VIA_REG_STATUS) &
while (count && (VIA_READ(VIA_REG_STATUS) &
(VIA_CMD_RGTR_BUSY | VIA_2D_ENG_BUSY |
VIA_3D_ENG_BUSY))) ;
VIA_3D_ENG_BUSY)))
--count;
return count;
}
@ -705,7 +707,7 @@ static int via_cmdbuf_size(struct drm_device *dev, void *data, struct drm_file *
switch (d_siz->func) {
case VIA_CMDBUF_SPACE:
while (((tmp_size = via_cmdbuf_space(dev_priv)) < d_siz->size)
&& count--) {
&& --count) {
if (!d_siz->wait) {
break;
}
@ -717,7 +719,7 @@ static int via_cmdbuf_size(struct drm_device *dev, void *data, struct drm_file *
break;
case VIA_CMDBUF_LAG:
while (((tmp_size = via_cmdbuf_lag(dev_priv)) > d_siz->size)
&& count--) {
&& --count) {
if (!d_siz->wait) {
break;
}