From: Heiner Kallweit <hkallweit1@gmail.com>
Date: Sun, 22 Aug 2021 15:54:23 +0200
Subject: bnx2x: Search VPD with pci_vpd_find_ro_info_keyword()
Patch-mainline: v5.15-rc1
Git-commit: 3831cba07a4bf96bc75fb963451a49d7f676c7d6
References: jsc#SLE-18274

Use pci_vpd_find_ro_info_keyword() to search for keywords in VPD to
simplify the code.

Use strncasecmp() to match Vendor ID instead of comparing with lower- and
upper-case hex string.

[bhelgaas: convert to strncasecmp()]
Link: https://lore.kernel.org/r/a9f730cf-e31e-902b-7b39-0ff2e99636e0@gmail.com
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c |   57 ++++++-----------------
 1 file changed, 15 insertions(+), 42 deletions(-)

--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
@@ -12189,11 +12189,10 @@ static int bnx2x_get_hwinfo(struct bnx2x
 
 static void bnx2x_read_fwinfo(struct bnx2x *bp)
 {
-	int i, block_end, rodi;
-	char str_id_reg[VENDOR_ID_LEN+1];
-	char str_id_cap[VENDOR_ID_LEN+1];
-	unsigned int vpd_len;
-	u8 *vpd_data, len;
+	char str_id[VENDOR_ID_LEN + 1];
+	unsigned int vpd_len, kw_len;
+	u8 *vpd_data;
+	int rodi;
 
 	memset(bp->fw_ver, 0, sizeof(bp->fw_ver));
 
@@ -12201,46 +12200,20 @@ static void bnx2x_read_fwinfo(struct bnx
 	if (IS_ERR(vpd_data))
 		return;
 
-	/* VPD RO tag should be first tag after identifier string, hence
-	 * we should be able to find it in first BNX2X_VPD_LEN chars
-	 */
-	i = pci_vpd_find_tag(vpd_data, vpd_len, PCI_VPD_LRDT_RO_DATA);
-	if (i < 0)
+	rodi = pci_vpd_find_ro_info_keyword(vpd_data, vpd_len,
+					    PCI_VPD_RO_KEYWORD_MFR_ID, &kw_len);
+	if (rodi < 0 || kw_len != VENDOR_ID_LEN)
 		goto out_not_found;
 
-	block_end = i + PCI_VPD_LRDT_TAG_SIZE +
-		    pci_vpd_lrdt_size(&vpd_data[i]);
-	i += PCI_VPD_LRDT_TAG_SIZE;
-
-	rodi = pci_vpd_find_info_keyword(vpd_data, i, block_end,
-				   PCI_VPD_RO_KEYWORD_MFR_ID);
-	if (rodi < 0)
-		goto out_not_found;
-
-	len = pci_vpd_info_field_size(&vpd_data[rodi]);
-
-	if (len != VENDOR_ID_LEN)
-		goto out_not_found;
-
-	rodi += PCI_VPD_INFO_FLD_HDR_SIZE;
-
 	/* vendor specific info */
-	snprintf(str_id_reg, VENDOR_ID_LEN + 1, "%04x", PCI_VENDOR_ID_DELL);
-	snprintf(str_id_cap, VENDOR_ID_LEN + 1, "%04X", PCI_VENDOR_ID_DELL);
-	if (!strncmp(str_id_reg, &vpd_data[rodi], VENDOR_ID_LEN) ||
-	    !strncmp(str_id_cap, &vpd_data[rodi], VENDOR_ID_LEN)) {
-
-		rodi = pci_vpd_find_info_keyword(vpd_data, i, block_end,
-						PCI_VPD_RO_KEYWORD_VENDOR0);
-		if (rodi >= 0) {
-			len = pci_vpd_info_field_size(&vpd_data[rodi]);
-
-			rodi += PCI_VPD_INFO_FLD_HDR_SIZE;
-
-			if (len < 32 && (len + rodi) <= vpd_len) {
-				memcpy(bp->fw_ver, &vpd_data[rodi], len);
-				bp->fw_ver[len] = ' ';
-			}
+	snprintf(str_id, VENDOR_ID_LEN + 1, "%04x", PCI_VENDOR_ID_DELL);
+	if (!strncasecmp(str_id, &vpd_data[rodi], VENDOR_ID_LEN)) {
+		rodi = pci_vpd_find_ro_info_keyword(vpd_data, vpd_len,
+						    PCI_VPD_RO_KEYWORD_VENDOR0,
+						    &kw_len);
+		if (rodi >= 0 && kw_len < sizeof(bp->fw_ver)) {
+			memcpy(bp->fw_ver, &vpd_data[rodi], kw_len);
+			bp->fw_ver[kw_len] = ' ';
 		}
 	}
 out_not_found: