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drm/nouveau/mc: have single entry and exit points to the interrupt handler 

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2013-10-11 14:41:27 +10:00
parent cfc2f2637a
commit 6dcee40a9b
1 changed files with 20 additions and 19 deletions
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39
drivers/gpu/drm/nouveau/core/subdev/mc/base.c
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@ -31,29 +31,30 @@ nouveau_mc_intr(int irq, void *arg)
struct nouveau_mc *pmc = arg;
const struct nouveau_mc_intr *map = pmc->intr_map;
struct nouveau_subdev *unit;
u32 stat, intr;
u32 intr, stat;
intr = stat = nv_rd32(pmc, 0x000100);
if (intr == 0xffffffff)
return IRQ_NONE;
while (stat && map->stat) {
if (stat & map->stat) {
unit = nouveau_subdev(pmc, map->unit);
if (unit && unit->intr)
unit->intr(unit);
intr &= ~map->stat;
intr = nv_rd32(pmc, 0x000100);
if (intr == 0xffffffff) /* likely fallen off the bus */
intr = 0x00000000;
if ((stat = intr) != 0) {
while (map->stat) {
if (intr & map->stat) {
unit = nouveau_subdev(pmc, map->unit);
if (unit && unit->intr)
unit->intr(unit);
stat &= ~map->stat;
}
map++;
}
map++;
if (pmc->use_msi)
nv_wr08(pmc, 0x088068, 0xff);
if (stat)
nv_error(pmc, "unknown intr 0x%08x\n", stat);
}
if (pmc->use_msi)
nv_wr08(pmc, 0x088068, 0xff);
if (intr) {
nv_error(pmc, "unknown intr 0x%08x\n", stat);
}
return stat ? IRQ_HANDLED : IRQ_NONE;
return intr ? IRQ_HANDLED : IRQ_NONE;
}
int