From: Jon Mason <mason@myri.com>
Date: Mon, 27 Jun 2011 05:05:05 +0000 (+0000)
Subject: myri10ge: remove unnecessary read of PCI_CAP_ID_EXP
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=effd1edab9fd3dc03cb87097a9da2552b940456b;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

myri10ge: remove unnecessary read of PCI_CAP_ID_EXP

The PCIE capability offset is saved during PCI bus walking.  It will
remove an unnecessary search in the PCI configuration space if this
value is referenced instead of reacquiring it.

Signed-off-by: Jon Mason <mason@myri.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/myri10ge/myri10ge.c b/drivers/net/myri10ge/myri10ge.c
index a0d4c619e859..42ea4f809171 100644
--- a/drivers/net/myri10ge/myri10ge.c
+++ b/drivers/net/myri10ge/myri10ge.c
@@ -1081,7 +1081,7 @@ static int myri10ge_toggle_relaxed(struct pci_dev *pdev, int on)
 	int ret, cap, err;
 	u16 ctl;
 
-	cap = pci_find_capability(pdev, PCI_CAP_ID_EXP);
+	cap = pci_pcie_cap(pdev);
 	if (!cap)
 		return 0;
 
@@ -3191,7 +3191,7 @@ static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
 {
 	struct pci_dev *bridge = mgp->pdev->bus->self;
 	struct device *dev = &mgp->pdev->dev;
-	unsigned cap;
+	int cap;
 	unsigned err_cap;
 	u16 val;
 	u8 ext_type;
@@ -3201,7 +3201,7 @@ static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
 		return;
 
 	/* check that the bridge is a root port */
-	cap = pci_find_capability(bridge, PCI_CAP_ID_EXP);
+	cap = pci_pcie_cap(bridge);
 	pci_read_config_word(bridge, cap + PCI_CAP_FLAGS, &val);
 	ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
 	if (ext_type != PCI_EXP_TYPE_ROOT_PORT) {
@@ -3219,8 +3219,7 @@ static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
 						" to force ECRC\n");
 					return;
 				}
-				cap =
-				    pci_find_capability(bridge, PCI_CAP_ID_EXP);
+				cap = pci_pcie_cap(bridge);
 				pci_read_config_word(bridge,
 						     cap + PCI_CAP_FLAGS, &val);
 				ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
@@ -3341,7 +3340,7 @@ static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
 		int link_width, exp_cap;
 		u16 lnk;
 
-		exp_cap = pci_find_capability(mgp->pdev, PCI_CAP_ID_EXP);
+		exp_cap = pci_pcie_cap(mgp->pdev);
 		pci_read_config_word(mgp->pdev, exp_cap + PCI_EXP_LNKSTA, &lnk);
 		link_width = (lnk >> 4) & 0x3f;