[PATCH v4 4/4] PCI/DPC: Add macro for RP busy check delay
From: Hans Zhang
Date: Sat Nov 01 2025 - 12:08:10 EST
Add PCIE_EXP_DPC_BUSY_CHECK_MS macro for RP busy check delay.
Signed-off-by: Hans Zhang <18255117159@xxxxxxx>
---
drivers/pci/pcie/dpc.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c
index fc18349614d7..bd5e8cd9e43e 100644
--- a/drivers/pci/pcie/dpc.c
+++ b/drivers/pci/pcie/dpc.c
@@ -21,6 +21,8 @@
#define PCI_EXP_DPC_CTL_EN_MASK (PCI_EXP_DPC_CTL_EN_FATAL | \
PCI_EXP_DPC_CTL_EN_NONFATAL)
+#define PCIE_EXP_DPC_BUSY_CHECK_MS 10
+
static const char * const rp_pio_error_string[] = {
"Configuration Request received UR Completion", /* Bit Position 0 */
"Configuration Request received CA Completion", /* Bit Position 1 */
@@ -135,7 +137,7 @@ static int dpc_wait_rp_inactive(struct pci_dev *pdev)
pci_read_config_word(pdev, cap + PCI_EXP_DPC_STATUS, &status);
while (status & PCI_EXP_DPC_RP_BUSY &&
!time_after(jiffies, timeout)) {
- msleep(10);
+ msleep(PCIE_EXP_DPC_BUSY_CHECK_MS);
pci_read_config_word(pdev, cap + PCI_EXP_DPC_STATUS, &status);
}
if (status & PCI_EXP_DPC_RP_BUSY) {
--
2.34.1