Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c4814f9001a8dd28e39311a919beac34f778f76d
Commit: c4814f9001a8dd28e39311a919beac34f778f76d
Parent: 777c7738a598c6e8d4b850181a509757fb79cf36
Author: Michel Dänzer <[EMAIL PROTECTED]>
AuthorDate: Sat May 26 04:37:08 2007 +1000
Committer: Dave Airlie <[EMAIL PROTECTED]>
CommitDate: Sat May 26 04:37:08 2007 +1000
drm: make sure the drawable code doesn't call malloc(0).
Signed-off-by: Michel Dänzer <[EMAIL PROTECTED]>
Signed-off-by: Dave Airlie <[EMAIL PROTECTED]>
---
drivers/char/drm/drm_drawable.c | 41 ++++++++++++++++++++++++--------------
1 files changed, 26 insertions(+), 15 deletions(-)
diff --git a/drivers/char/drm/drm_drawable.c b/drivers/char/drm/drm_drawable.c
index de37d5f..b33313b 100644
--- a/drivers/char/drm/drm_drawable.c
+++ b/drivers/char/drm/drm_drawable.c
@@ -172,38 +172,49 @@ int drm_rmdraw(DRM_IOCTL_ARGS)
bitfield_length = idx + 1;
- if (idx != id / (8 * sizeof(*bitfield)))
- bitfield = drm_alloc(bitfield_length *
- sizeof(*bitfield), DRM_MEM_BUFS);
+ bitfield = NULL;
- if (!bitfield && bitfield_length) {
- bitfield = dev->drw_bitfield;
- bitfield_length = dev->drw_bitfield_length;
+ if (bitfield_length) {
+ if (bitfield_length != dev->drw_bitfield_length)
+ bitfield = drm_alloc(bitfield_length *
+ sizeof(*bitfield),
+ DRM_MEM_BUFS);
+
+ if (!bitfield) {
+ bitfield = dev->drw_bitfield;
+ bitfield_length = dev->drw_bitfield_length;
+ }
}
}
if (bitfield != dev->drw_bitfield) {
info_length = 8 * sizeof(*bitfield) * bitfield_length;
- info = drm_alloc(info_length * sizeof(*info), DRM_MEM_BUFS);
+ if (info_length) {
+ info = drm_alloc(info_length * sizeof(*info),
+ DRM_MEM_BUFS);
- if (!info && info_length) {
- info = dev->drw_info;
- info_length = dev->drw_info_length;
- }
+ if (!info) {
+ info = dev->drw_info;
+ info_length = dev->drw_info_length;
+ }
+ } else
+ info = NULL;
spin_lock_irqsave(&dev->drw_lock, irqflags);
- memcpy(bitfield, dev->drw_bitfield, bitfield_length *
- sizeof(*bitfield));
+ if (bitfield)
+ memcpy(bitfield, dev->drw_bitfield, bitfield_length *
+ sizeof(*bitfield));
drm_free(dev->drw_bitfield, sizeof(*bitfield) *
dev->drw_bitfield_length, DRM_MEM_BUFS);
dev->drw_bitfield = bitfield;
dev->drw_bitfield_length = bitfield_length;
if (info != dev->drw_info) {
- memcpy(info, dev->drw_info, info_length *
- sizeof(*info));
+ if (info)
+ memcpy(info, dev->drw_info, info_length *
+ sizeof(*info));
drm_free(dev->drw_info, sizeof(*info) *
dev->drw_info_length, DRM_MEM_BUFS);
dev->drw_info = info;
-
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