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llvmpipe: fix udmabuf mmap error check

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Upon failing to mmap, MAP_FAILED (void *)-1 is returned instead of NULL.

Fixes: d74ea2c117 ("llvmpipe: Implement dmabuf handling")
Reviewed-by: Christian Gmeiner <cgmeiner@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38074>
(cherry picked from commit 3e07f57d4a)
This commit is contained in:
Yiwei Zhang 2025-10-26 20:20:46 -07:00 • committed by Eric Engestrom
parent ab5f1669d2
commit fd085d2e3e
2 changed files with 2 additions and 3 deletions
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2
.pick_status.json
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@ -2874,7 +2874,7 @@
"description": "llvmpipe: fix udmabuf mmap error check",
"nominated": true,
"nomination_type": 2,
"resolution": 0,
"resolution": 1,
"main_sha": null,
"because_sha": "d74ea2c117fe96e527471e572336f931c3c77da1",
"notes": null

3
src/gallium/drivers/llvmpipe/lp_texture.c
View file

@ -1415,8 +1415,7 @@ llvmpipe_resource_alloc_udmabuf(struct llvmpipe_screen *screen,
struct pipe_memory_allocation *data =
mmap(NULL, size, PROT_WRITE | PROT_READ, MAP_SHARED, mem_fd, 0);
if (!data)
if (data == MAP_FAILED)
goto fail;
alloc->mem_fd = mem_fd;