From: Nathan Hintz <nlhintz@hotmail.com>
Date: Sat, 12 Jan 2013 10:46:16 +0000 (-0800)
Subject: bcma: add support for 1 and 2 byte extended config space access
X-Git-Tag: v3.9-rc1~139^2~242^2^2~20
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b09e9abd091a4ed1e638a810b25c6577b4621b12;p=platform%2Fkernel%2Flinux-stable.git

bcma: add support for 1 and 2 byte extended config space access

The sanity checks allow 1 and 2 byte reads/writes of the extended
PCI config space to proceed; however, the code only supports 4
byte reads/writes.  This patch adds support for 1 and 2 byte
reads/writes of the extended PCI config space.

Signed-off-by: Nathan Hintz <nlhintz@hotmail.com>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/drivers/bcma/driver_pci_host.c b/drivers/bcma/driver_pci_host.c
index c0cb062..f92124c 100644
--- a/drivers/bcma/driver_pci_host.c
+++ b/drivers/bcma/driver_pci_host.c
@@ -101,7 +101,7 @@ static int bcma_extpci_read_config(struct bcma_drv_pci *pc, unsigned int dev,
 		 */
 		if (off >= PCI_CONFIG_SPACE_SIZE) {
 			addr = (func << 12);
-			addr |= (off & 0x0FFF);
+			addr |= (off & 0x0FFC);
 			val = bcma_pcie_read_config(pc, addr);
 		} else {
 			addr = BCMA_CORE_PCI_PCICFG0;
@@ -164,7 +164,11 @@ static int bcma_extpci_write_config(struct bcma_drv_pci *pc, unsigned int dev,
 		/* accesses to config registers with offsets >= 256
 		 * requires indirect access.
 		 */
-		if (off < PCI_CONFIG_SPACE_SIZE) {
+		if (off >= PCI_CONFIG_SPACE_SIZE) {
+			addr = (func << 12);
+			addr |= (off & 0x0FFC);
+			val = bcma_pcie_read_config(pc, addr);
+		} else {
 			addr = BCMA_CORE_PCI_PCICFG0;
 			addr |= (func << 8);
 			addr |= (off & 0xfc);
@@ -202,13 +206,10 @@ static int bcma_extpci_write_config(struct bcma_drv_pci *pc, unsigned int dev,
 		/* accesses to config registers with offsets >= 256
 		 * requires indirect access.
 		 */
-		if (off >= PCI_CONFIG_SPACE_SIZE) {
-			addr = (func << 12);
-			addr |= (off & 0x0FFF);
+		if (off >= PCI_CONFIG_SPACE_SIZE)
 			bcma_pcie_write_config(pc, addr, val);
-		} else {
+		else
 			pcicore_write32(pc, addr, val);
-		}
 	} else {
 		writel(val, mmio);