5.10-stable review patch. If anyone has any objections, please let me know.
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From: Zenghui Yu yuzenghui@huawei.com
[ Upstream commit 291e4baf70019f17a81b7b47aeb186b27d222159 ]
Even if a vgem device is configured in, we will skip the import_vgem_fd() test almost every time.
TAP version 13 1..11 # Testing heap: system # ======================================= # Testing allocation and importing: ok 1 # SKIP Could not open vgem -1
The problem is that we use the DRM_IOCTL_VERSION ioctl to query the driver version information but leave the name field a non-null-terminated string. Terminate it properly to actually test against the vgem device.
While at it, let's check the length of the driver name is exactly 4 bytes and return early otherwise (in case there is a name like "vgemfoo" that gets converted to "vgem\0" unexpectedly).
Signed-off-by: Zenghui Yu yuzenghui@huawei.com Signed-off-by: Daniel Vetter daniel.vetter@ffwll.ch Link: https://patchwork.freedesktop.org/patch/msgid/20240729024604.2046-1-yuzenghu... Signed-off-by: Sasha Levin sashal@kernel.org --- tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c b/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c index 909da9cdda97..aa4be40f7d49 100644 --- a/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c +++ b/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c @@ -29,9 +29,11 @@ static int check_vgem(int fd) version.name = name;
ret = ioctl(fd, DRM_IOCTL_VERSION, &version); - if (ret) + if (ret || version.name_len != 4) return 0;
+ name[4] = '\0'; + return !strcmp(name, "vgem"); }