Kernel/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2025-01-10 23:20:05 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

drm/nv50: fail auxch transaction if reply count not what we expect

Browse Source 
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2010-01-22 09:10:05 +10:00
parent 0208843dd5
commit 0107bae01a
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/gpu/drm/nouveau/nouveau_dp.c
View File

@ -490,7 +490,8 @@ nouveau_dp_auxch(struct nouveau_i2c_chan *auxch, int cmd, int addr,
if (!nv_wait(NV50_AUXCH_CTRL(index), 0x00010000, 0x00000000)) {
NV_ERROR(dev, "expected bit 16 == 0, got 0x%08x\n",
nv_rd32(dev, NV50_AUXCH_CTRL(index)));
return -EBUSY;
ret = -EBUSY;
goto out;
}
udelay(400);
@ -501,6 +502,11 @@ nouveau_dp_auxch(struct nouveau_i2c_chan *auxch, int cmd, int addr,
break;
}
if ((stat & NV50_AUXCH_STAT_COUNT) != data_nr) {
ret = -EREMOTEIO;
goto out;
}
if (cmd & 1) {
for (i = 0; i < 4; i++) {
data32[i] = nv_rd32(dev, NV50_AUXCH_DATA_IN(index, i));