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PCI: dwc: Avoid dwc_pcie_rasdes_debugfs_deinit() NULL dereference when no RAS DES capability

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dwc_pcie_rasdes_debugfs_init() returns success when the controller has no
RAS DES capability, leaving pci->debugfs->rasdes_info unset. The common
debugfs teardown path still calls dwc_pcie_rasdes_debugfs_deinit(), which
dereferences rasdes_info unconditionally.

Return early when no RAS DES state was allocated. In that case no RAS DES
mutex was initialized, so there is nothing to destroy.

Fixes: 4fbfa17f9a ("PCI: dwc: Add debugfs based Silicon Debug support for DWC")
Signed-off-by: Shuvam Pandey <shuvampandey1@gmail.com>
[mani: reworded subject]
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/0f97352506d8d813f70f441de4d63fcd5b7d1c3e.1779123847.git.shuvampandey1@gmail.com
This commit is contained in:
Shuvam Pandey
2026-05-18 22:44:17 +05:45
committed by Bjorn Helgaas
parent 94ac934d2c
commit 26b67fa10e
1 changed files with 3 additions and 0 deletions
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3
drivers/pci/controller/dwc/pcie-designware-debugfs.c
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@@ -550,6 +550,9 @@ static void dwc_pcie_rasdes_debugfs_deinit(struct dw_pcie *pci)
{
struct dwc_pcie_rasdes_info *rinfo = pci->debugfs->rasdes_info;
if (!rinfo)
return;
mutex_destroy(&rinfo->reg_event_lock);
}