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| author | Xinghui Li <korantli@tencent.com> | 2023-04-20 17:43:31 +0800 |
|---|---|---|
| committer | Krzysztof Wilczyński <kwilczynski@kernel.org> | 2023-06-24 16:09:16 +0000 |
| commit | 0c0206dc4f5ba2d18b15e24d2047487d6f73916b (patch) | |
| tree | 573d24686d3c3279cd2e1160bc768a868dac1ec2 /drivers/pci | |
| parent | b61cf04c49c3dfa70a0d6725d3eb40bf9b35cf71 (diff) | |
| download | lwn-0c0206dc4f5ba2d18b15e24d2047487d6f73916b.tar.gz lwn-0c0206dc4f5ba2d18b15e24d2047487d6f73916b.zip | |
PCI: vmd: Fix uninitialized variable usage in vmd_enable_domain()
The ret variable in the vmd_enable_domain() function was used
uninitialized when printing a warning message upon failure of
the pci_reset_bus() function.
Thus, fix the issue by assigning ret with the value returned from
pci_reset_bus() before referencing it in the warning message.
This was detected by Smatch:
drivers/pci/controller/vmd.c:931 vmd_enable_domain() error: uninitialized symbol 'ret'.
[kwilczynski: drop the second patch from the series, add missing reported
by tag, commit log]
Fixes: 0a584655ef89 ("PCI: vmd: Fix secondary bus reset for Intel bridges")
Link: https://lore.kernel.org/all/202305270219.B96IiIfv-lkp@intel.com
Link: https://lore.kernel.org/linux-pci/20230420094332.1507900-2-korantwork@gmail.com
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Xinghui Li <korantli@tencent.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Nirmal Patel <nirmal.patel@linux.intel.com>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/controller/vmd.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/pci/controller/vmd.c b/drivers/pci/controller/vmd.c index 30ec18283aaf..e718a816d481 100644 --- a/drivers/pci/controller/vmd.c +++ b/drivers/pci/controller/vmd.c @@ -927,7 +927,8 @@ static int vmd_enable_domain(struct vmd_dev *vmd, unsigned long features) if (!list_empty(&child->devices)) { dev = list_first_entry(&child->devices, struct pci_dev, bus_list); - if (pci_reset_bus(dev)) + ret = pci_reset_bus(dev); + if (ret) pci_warn(dev, "can't reset device: %d\n", ret); break; |