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change loops that get optimized out by gcc to udelay, avoids lockups (Mike

Browse source 
A. Harris)
This commit is contained in:
Alan Hourihane 2002-05-17 08:16:01 +00:00
parent 951b44b4b9
commit 4a86c817f8
4 changed files with 6 additions and 8 deletions
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3
linux-core/i810_dma.c
View file

@ -350,8 +350,7 @@ static int i810_wait_ring(drm_device_t *dev, int n)
DRM_ERROR("lockup\n");
goto out_wait_ring;
}
for (i = 0 ; i < 2000 ; i++) ;
udelay(1);
}
out_wait_ring:

4
linux-core/i830_dma.c
View file

@ -60,7 +60,7 @@ do { \
do { \
_head = I830_READ(LP_RING + RING_HEAD) & HEAD_ADDR; \
_tail = I830_READ(LP_RING + RING_TAIL) & TAIL_ADDR; \
for(_i = 0; _i < 65535; _i++); \
udelay(10); \
} while(_head != _tail); \
} while(0)
@ -389,7 +389,7 @@ static int i830_wait_ring(drm_device_t *dev, int n)
goto out_wait_ring;
}
for (i = 0 ; i < 2000 ; i++) ;
udelay(1);
}
out_wait_ring:

3
linux/i810_dma.c
View file

@ -350,8 +350,7 @@ static int i810_wait_ring(drm_device_t *dev, int n)
DRM_ERROR("lockup\n");
goto out_wait_ring;
}
for (i = 0 ; i < 2000 ; i++) ;
udelay(1);
}
out_wait_ring:

4
linux/i830_dma.c
View file

@ -60,7 +60,7 @@ do { \
do { \
_head = I830_READ(LP_RING + RING_HEAD) & HEAD_ADDR; \
_tail = I830_READ(LP_RING + RING_TAIL) & TAIL_ADDR; \
for(_i = 0; _i < 65535; _i++); \
udelay(10); \
} while(_head != _tail); \
} while(0)
@ -389,7 +389,7 @@ static int i830_wait_ring(drm_device_t *dev, int n)
goto out_wait_ring;
}
for (i = 0 ; i < 2000 ; i++) ;
udelay(1);
}
out_wait_ring: