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Revert "nouveau/bios: Fix tracking of BIOS image data" 

This reverts commit d06221c061.

It turns out to trigger the "BUG_ON(!PageCompound(page))" in kfree(),
apparently because the code ends up trying to free somethng that was
never kmalloced in the first place.

BenH points out that the patch was untested and wasn't meant to go into
the upstream kernel that quickly in the first place.

Backtrace:
  bios_shadow
  bios_shadow_prom
  nv_mask
  init_io
  bios_shadow
  nouveau_bios_init
  NVReadVgaCrtc
  NVSetOwner
  nouveau_card_init
  nouveau_load

Reported-by: Meelis Roos <mroos@linux.ee>
Requested-by: Dave Airlie <airlied@gmail.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds 2012-04-04 08:16:25 -07:00
parent 01627d968c
commit f3718a818f
1 changed files with 1 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/gpu/drm/nouveau/nouveau_bios.c
View File

@ -273,7 +273,6 @@ 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;
@ -282,8 +281,7 @@ 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) {