PCI hotplug: add support for 5.0G link speed

Add support for PCI-E 5.0 GT/s in max_bus_speed and cur_bus_speed.
Reviewed-by: NMatthew Wilcox <matthew@wil.cx>
Signed-off-by: NKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

drivers/pci/hotplug/pci_hotplug_core.c

@@ -87,6 +87,7 @@ static char *pci_bus_speed_strings[] = {
 	"100 MHz PCIX 533",	/* 0x12 */
 	"133 MHz PCIX 533",	/* 0x13 */
 	"2.5 GT/s PCI-E",	/* 0x14 */
+	"5.0 GT/s PCI-E",	/* 0x15 */
 };
 
 #ifdef CONFIG_HOTPLUG_PCI_CPCI

drivers/pci/hotplug/pciehp_hpc.c

@@ -693,7 +693,10 @@ static int hpc_get_max_lnk_speed(struct slot *slot, enum pci_bus_speed *value)
 
 	switch (lnk_cap & 0x000F) {
 	case 1:
-		lnk_speed = PCIE_2PT5GB;
+		lnk_speed = PCIE_2_5GB;
+		break;
+	case 2:
+		lnk_speed = PCIE_5_0GB;
 		break;
 	default:
 		lnk_speed = PCIE_LNK_SPEED_UNKNOWN;
@@ -772,7 +775,10 @@ static int hpc_get_cur_lnk_speed(struct slot *slot, enum pci_bus_speed *value)
 
 	switch (lnk_status & PCI_EXP_LNKSTA_CLS) {
 	case 1:
-		lnk_speed = PCIE_2PT5GB;
+		lnk_speed = PCIE_2_5GB;
+		break;
+	case 2:
+		lnk_speed = PCIE_5_0GB;
 		break;
 	default:
 		lnk_speed = PCIE_LNK_SPEED_UNKNOWN;

include/linux/pci_hotplug.h

@@ -62,7 +62,8 @@ enum pcie_link_width {
 };
 
 enum pcie_link_speed {
-	PCIE_2PT5GB		= 0x14,
+	PCIE_2_5GB		= 0x14,
+	PCIE_5_0GB		= 0x15,
 	PCIE_LNK_SPEED_UNKNOWN	= 0xFF,
 };