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path: root/drivers/pci/pcie
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Diffstat (limited to 'drivers/pci/pcie')
-rw-r--r--drivers/pci/pcie/dpc.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c
index 3e9afee02e8d..f5ffea17c7f8 100644
--- a/drivers/pci/pcie/dpc.c
+++ b/drivers/pci/pcie/dpc.c
@@ -335,11 +335,16 @@ void pci_dpc_init(struct pci_dev *pdev)
return;
pdev->dpc_rp_extensions = true;
- pdev->dpc_rp_log_size = (cap & PCI_EXP_DPC_RP_PIO_LOG_SIZE) >> 8;
- if (pdev->dpc_rp_log_size < 4 || pdev->dpc_rp_log_size > 9) {
- pci_err(pdev, "RP PIO log size %u is invalid\n",
- pdev->dpc_rp_log_size);
- pdev->dpc_rp_log_size = 0;
+
+ /* Quirks may set dpc_rp_log_size if device or firmware is buggy */
+ if (!pdev->dpc_rp_log_size) {
+ pdev->dpc_rp_log_size =
+ (cap & PCI_EXP_DPC_RP_PIO_LOG_SIZE) >> 8;
+ if (pdev->dpc_rp_log_size < 4 || pdev->dpc_rp_log_size > 9) {
+ pci_err(pdev, "RP PIO log size %u is invalid\n",
+ pdev->dpc_rp_log_size);
+ pdev->dpc_rp_log_size = 0;
+ }
}
}