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drm/virtio: Use vmalloc for command buffer allocations.

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Userspace requested command buffer allocations could be too large
to make as a contiguous allocation.  Use vmalloc if necessary to
satisfy those allocations.

Signed-off-by: David Riley <davidriley@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20190911181403.40909-3-davidriley@chromium.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
David Riley
2019-09-11 11:14:03 -07:00
committed by Gerd Hoffmann
parent 32d6c2c5b5
commit e1218b8c0c
2 changed files with 72 additions and 10 deletions
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4
drivers/gpu/drm/virtio/virtgpu_ioctl.c
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@@ -143,7 +143,7 @@ static int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data,
goto out_unused_fd;
}
buf = memdup_user(u64_to_user_ptr(exbuf->command), exbuf->size);
buf = vmemdup_user(u64_to_user_ptr(exbuf->command), exbuf->size);
if (IS_ERR(buf)) {
ret = PTR_ERR(buf);
goto out_unresv;
@@ -172,7 +172,7 @@ static int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data,
return 0;
out_memdup:
kfree(buf);
kvfree(buf);
out_unresv:
if (buflist)
virtio_gpu_array_unlock_resv(buflist);