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| author | Ben Skeggs <bskeggs@redhat.com> | 2010-01-22 02:10:05 +0300 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2010-01-25 03:35:25 +0300 |
| commit | 0107bae01add219e1a146f2b412d64a7f1946028 (patch) | |
| tree | 7432b1d6c37f53ba03a65fe2fe2a102336bd6c67 /drivers/gpu/drm/nouveau/nouveau_dp.c | |
| parent | 0208843dd59330c30e0773c77d5362260aa340e0 (diff) | |
| download | linux-0107bae01add219e1a146f2b412d64a7f1946028.tar.xz | |
drm/nv50: fail auxch transaction if reply count not what we expect
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_dp.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_dp.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_dp.c b/drivers/gpu/drm/nouveau/nouveau_dp.c index 9e2926c48579..dd4937224220 100644 --- a/drivers/gpu/drm/nouveau/nouveau_dp.c +++ b/drivers/gpu/drm/nouveau/nouveau_dp.c @@ -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)); |