[PATCH] PCI: Add #defines for Completion Timeout Disable feature

[Bjorn Helgaas]

From: Bjorn Helgaas <bhelgaas at google.com>

Add #defines for the Completion Timeout Disable feature and use them.  No
functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas at google.com>
---
 arch/powerpc/platforms/powernv/eeh-powernv.c |    6 +++---
 include/uapi/linux/pci_regs.h                |    2 ++
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/platforms/powernv/eeh-powernv.c b/arch/powerpc/platforms/powernv/eeh-powernv.c
index 4650fb294e7a..2f7cd0ef3cdc 100644
--- a/arch/powerpc/platforms/powernv/eeh-powernv.c
+++ b/arch/powerpc/platforms/powernv/eeh-powernv.c
@@ -1654,14 +1654,14 @@ static int pnv_eeh_restore_vf_config(struct pci_dn *pdn)
 		eeh_ops->write_config(pdn, edev->pcie_cap + PCI_EXP_DEVCTL,
 				      2, devctl);
 
-		/* Disable Completion Timeout */
+		/* Disable Completion Timeout if possible */
 		eeh_ops->read_config(pdn, edev->pcie_cap + PCI_EXP_DEVCAP2,
 				     4, &cap2);
-		if (cap2 & 0x10) {
+		if (cap2 & PCI_EXP_DEVCAP2_COMP_TMOUT_DIS) {
 			eeh_ops->read_config(pdn,
 					     edev->pcie_cap + PCI_EXP_DEVCTL2,
 					     4, &cap2);
-			cap2 |= 0x10;
+			cap2 |= PCI_EXP_DEVCTL2_COMP_TMOUT_DIS;
 			eeh_ops->write_config(pdn,
 					      edev->pcie_cap + PCI_EXP_DEVCTL2,
 					      4, cap2);
diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h
index 70c2b2ade048..9dc67643fc18 100644
--- a/include/uapi/linux/pci_regs.h
+++ b/include/uapi/linux/pci_regs.h
@@ -622,6 +622,7 @@
  * safely.
  */
 #define PCI_EXP_DEVCAP2		36	/* Device Capabilities 2 */
+#define  PCI_EXP_DEVCAP2_COMP_TMOUT_DIS	0x00000010 /* Completion Timeout Disable supported */
 #define  PCI_EXP_DEVCAP2_ARI		0x00000020 /* Alternative Routing-ID */
 #define  PCI_EXP_DEVCAP2_ATOMIC_ROUTE	0x00000040 /* Atomic Op routing */
 #define PCI_EXP_DEVCAP2_ATOMIC_COMP64	0x00000100 /* Atomic 64-bit compare */
@@ -631,6 +632,7 @@
 #define  PCI_EXP_DEVCAP2_OBFF_WAKE	0x00080000 /* Re-use WAKE# for OBFF */
 #define PCI_EXP_DEVCTL2		40	/* Device Control 2 */
 #define  PCI_EXP_DEVCTL2_COMP_TIMEOUT	0x000f	/* Completion Timeout Value */
+#define  PCI_EXP_DEVCTL2_COMP_TMOUT_DIS	0x0010	/* Completion Timeout Disable */
 #define  PCI_EXP_DEVCTL2_ARI		0x0020	/* Alternative Routing-ID */
 #define PCI_EXP_DEVCTL2_ATOMIC_REQ	0x0040	/* Set Atomic requests */
 #define PCI_EXP_DEVCTL2_ATOMIC_EGRESS_BLOCK 0x0080 /* Block atomic egress */