pci: Add a constant for an invalid interrupt
Rather than using 0xff in the code, add a constant.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index df50b48..645ecd4 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -269,7 +269,8 @@
/* Disable interrupt line, if device says it wants to use interrupts */
pci_hose_read_config_byte(hose, dev, PCI_INTERRUPT_PIN, &pin);
if (pin != 0) {
- pci_hose_write_config_byte(hose, dev, PCI_INTERRUPT_LINE, 0xff);
+ pci_hose_write_config_byte(hose, dev, PCI_INTERRUPT_LINE,
+ PCI_INTERRUPT_LINE_DISABLE);
}
pci_hose_read_config_dword(hose, dev, PCI_COMMAND, &old_command);
diff --git a/include/pci.h b/include/pci.h
index dce159f..628ede0 100644
--- a/include/pci.h
+++ b/include/pci.h
@@ -231,6 +231,8 @@
#define PCI_MIN_GNT 0x3e /* 8 bits */
#define PCI_MAX_LAT 0x3f /* 8 bits */
+#define PCI_INTERRUPT_LINE_DISABLE 0xff
+
/* Header type 1 (PCI-to-PCI bridges) */
#define PCI_PRIMARY_BUS 0x18 /* Primary bus number */
#define PCI_SECONDARY_BUS 0x19 /* Secondary bus number */