Commit d06221c0 authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt Committed by Dave Airlie

nouveau/bios: Fix tracking of BIOS image data

The code tries various methods for retreiving the BIOS data. However
it doesn't clear the bios->data pointer between the iterations.

In some cases, the shadow() method will fail and not update bios->data
at all, which will cause us to "score" the old data and incorrectly
attribute that score to the new method. This can cause double frees
later when disposing of the unused data.

Additionally, we were not freeing the data for methods that fail the
score test (we only freed when a "best" is superseeded, not when the
new method has a lower score than the exising "best"). Fix that as well.
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: default avatarBen Skeggs <bskeggs@redhat.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent ea71f98d
......@@ -273,6 +273,7 @@ bios_shadow(struct drm_device *dev)
mthd->score = score_vbios(bios, mthd->rw);
mthd->size = bios->length;
mthd->data = bios->data;
bios->data = NULL;
} while (mthd->score != 3 && (++mthd)->shadow);
mthd = shadow_methods;
......@@ -281,7 +282,8 @@ bios_shadow(struct drm_device *dev)
if (mthd->score > best->score) {
kfree(best->data);
best = mthd;
}
} else
kfree(mthd->data);
} while ((++mthd)->shadow);
if (best->score) {
......
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