linux-kernel - [PATCH 3/3] sky2: use pci_read

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Message-ID: <20080903160017.299831b0@extreme>
Date:	Wed, 3 Sep 2008 16:00:17 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Stephen Hemminger <shemminger@...tta.com>
Cc:	Ben Hutchings <bhutchings@...arflare.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	linux-pci@...r.kernel.org
Subject: [PATCH 3/3] sky2: use pci_read_vpd to read info during boot

Change sky2 driver (in netdev next tree) to use vpd access routines.

Signed-off-by: Stephen Hemminger <shemminger@...tta.com>

Note: other usage of vpd internal access routines will go away in later patches.

---
Patch against netdev-2.6#upstream-next assumes the previous PCI API change.

--- a/drivers/net/sky2.c	2008-09-03 11:35:47.000000000 -0700
+++ b/drivers/net/sky2.c	2008-09-03 11:44:06.000000000 -0700
@@ -4199,10 +4199,9 @@ static int __devinit pci_wake_enabled(st
 
 static void __devinit sky2_vpd_info(struct sky2_hw *hw)
 {
-	int cap = pci_find_capability(hw->pdev, PCI_CAP_ID_VPD);
-	const u8 *p;
-	u8 *vpd_buf = NULL;
-	u16 len;
+	loff_t offs;
+	u8 len;
+	u8 tag[3];
 	static struct vpd_tag {
 		char tag[2];
 		char *label;
@@ -4211,47 +4210,48 @@ static void __devinit sky2_vpd_info(stru
 		{ "EC", "Engineering Level" },
 		{ "MN", "Manufacturer" },
 	};
+	char str[128];
 
-	if (!cap)
-		goto out;
-
-	vpd_buf = kmalloc(VPD_SIZE, GFP_KERNEL);
-	if (!vpd_buf)
-		goto out;
+	if (pci_read_vpd(hw->pdev, 0, sizeof(tag), tag) < 0)
+		return;
+	if (tag[0] != VPD_MAGIC)
+		return;
+	len = tag[1];
+	if (len == 0 || len > sizeof(str))
+		return;
 
-	if (sky2_vpd_read(hw, cap, vpd_buf, 0, VPD_SIZE))
-		goto out;
+	offs = 3;
+	if (pci_read_vpd(hw->pdev, offs, len, str) < 0)
+		return;
 
-	if (vpd_buf[0] != VPD_MAGIC)
-		goto out;
-	len = vpd_buf[1];
-	if (len == 0 || len > VPD_SIZE - 4)
-		goto out;
-	p = vpd_buf + 3;
-	dev_info(&hw->pdev->dev, "%.*s\n", len, p);
-	p += len;
+	dev_info(&hw->pdev->dev, "%.*s\n", len, str);
 
-	while (p < vpd_buf + VPD_SIZE - 4) {
+	for(;;) {
 		int i;
 
-		if (!memcmp("RW", p, 2))	/* end marker */
+		offs += len;
+		if (pci_read_vpd(hw->pdev, offs, sizeof(tag), tag) < 0)
 			break;
 
-		len = p[2];
-		if (len > (p - vpd_buf) - 4)
+		if (!memcmp("RW", tag, 2))	/* end marker */
+			break;
+
+		offs += sizeof(tag);
+		len = tag[2];
+		if (len > sizeof(str))
 			break;
 
 		for (i = 0; i < ARRAY_SIZE(vpd_tags); i++) {
-			if (!memcmp(vpd_tags[i].tag, p, 2)) {
+			if (!memcmp(vpd_tags[i].tag, tag, 2)) {
+				if (pci_read_vpd(hw->pdev, offs, len, str) < 0)
+					return;
+
 				printk(KERN_DEBUG " %s: %.*s\n",
-				       vpd_tags[i].label, len, p + 3);
+				       vpd_tags[i].label, len, str);
 				break;
 			}
 		}
-		p += len + 3;
 	}
-out:
-	kfree(vpd_buf);
 }
 
 /* This driver supports yukon2 chipset only */

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