diff options
| author | Markus Elfring <Markus.Elfring@web.de> | 2023-04-16 08:18:40 +0200 |
|---|---|---|
| committer | Karol Herbst <kherbst@redhat.com> | 2023-04-17 19:08:04 +0200 |
| commit | 488c1ce6a8f3d46e20440b2e240e096a20259fcc (patch) | |
| tree | bc22b79b2afac091278a3f2b81fc3fbf1a94468b /drivers/gpu | |
| parent | 41239aa4f751fbc39481a4af726faa347a26da83 (diff) | |
drm/nouveau/pci: Move a variable assignment behind condition checks in nvkm_pcie_set_link()
The address of a data structure member was determined before
a corresponding null pointer check in the implementation of
the function “nvkm_pcie_set_link”.
Thus avoid the risk for undefined behaviour by moving the assignment
for the variable “subdev” behind some condition checks.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Karol Herbst <kherbst@redhat.com>
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/b31019b1-bb73-ed93-3378-e551e17a4f32@web.de
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/pci/pcie.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/pcie.c b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/pcie.c index d71e5db5028a..b295f100e1c1 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/pci/pcie.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pci/pcie.c @@ -114,7 +114,7 @@ nvkm_pcie_init(struct nvkm_pci *pci) int nvkm_pcie_set_link(struct nvkm_pci *pci, enum nvkm_pcie_speed speed, u8 width) { - struct nvkm_subdev *subdev = &pci->subdev; + struct nvkm_subdev *subdev; enum nvkm_pcie_speed cur_speed, max_speed; struct pci_bus *pbus; int ret; @@ -126,6 +126,7 @@ nvkm_pcie_set_link(struct nvkm_pci *pci, enum nvkm_pcie_speed speed, u8 width) if (!pci->func->pcie.set_link) return -ENOSYS; + subdev = &pci->subdev; nvkm_trace(subdev, "requested %s\n", nvkm_pcie_speeds[speed]); if (pci->func->pcie.version(pci) < 2) { |