evie/android_kernel_oneplus_msm8998
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Merge "msm: kgsl: Fix the ringbuffer wrap around logic"

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Linux Build Service Account 2016-08-16 10:20:22 -07:00 • committed by Gerrit - the friendly Code Review server
commit c19e021f99
1 changed files with 12 additions and 5 deletions
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17
drivers/gpu/msm/adreno_ringbuffer.c
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@ -158,11 +158,18 @@ unsigned int *adreno_ringbuffer_allocspace(struct adreno_ringbuffer *rb,
return RB_HOSTPTR(rb, ret); return RB_HOSTPTR(rb, ret);
} }
cmds = RB_HOSTPTR(rb, rb->_wptr); /*
*cmds = cp_packet(adreno_dev, CP_NOP, * There isn't enough space toward the end of ringbuffer. So
KGSL_RB_DWORDS - rb->_wptr - 1); * look for space from the beginning of ringbuffer upto the
* read pointer.
rb->_wptr = 0; */
if (dwords < rptr) {
cmds = RB_HOSTPTR(rb, rb->_wptr);
*cmds = cp_packet(adreno_dev, CP_NOP,
KGSL_RB_DWORDS - rb->_wptr - 1);
rb->_wptr = dwords;
return RB_HOSTPTR(rb, 0);
}
} }
if (rb->_wptr + dwords < rptr) { if (rb->_wptr + dwords < rptr) {