netdev - [PATCH 5/8] sfc: Use new VPD API function pci_vpd_find_ro_info

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Message-ID: <bf5d4ba9-61a9-2bfe-19ec-75472732d74d@gmail.com>
Date:   Wed, 18 Aug 2021 21:03:44 +0200
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Edward Cree <ecree.xilinx@...il.com>,
        Martin Habets <habetsm.xilinx@...il.com>,
        David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH 5/8] sfc: Use new VPD API function
 pci_vpd_find_ro_info_keyword

Use new VPD API function pci_vpd_find_ro_info_keyword() to simplify
the code. In addition replace netif_err() with pci_err() because the
netdevice isn't registered yet what results in very ugly messages.
Use kmemdup_nul() instead of open-coding it.

Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
---
 drivers/net/ethernet/sfc/efx.c | 65 ++++++++--------------------------
 1 file changed, 14 insertions(+), 51 deletions(-)

diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c
index e04a63109..43ef4f529 100644
--- a/drivers/net/ethernet/sfc/efx.c
+++ b/drivers/net/ethernet/sfc/efx.c
@@ -905,9 +905,9 @@ static void efx_pci_remove(struct pci_dev *pci_dev)
 static void efx_probe_vpd_strings(struct efx_nic *efx)
 {
 	struct pci_dev *dev = efx->pci_dev;
-	int ro_start, ro_size, i, j;
-	unsigned int vpd_size;
+	unsigned int vpd_size, kw_len;
 	u8 *vpd_data;
+	int start;
 
 	vpd_data = pci_vpd_alloc(dev, &vpd_size);
 	if (IS_ERR(vpd_data)) {
@@ -915,57 +915,20 @@ static void efx_probe_vpd_strings(struct efx_nic *efx)
 		return;
 	}
 
-	/* Get the Read only section */
-	ro_start = pci_vpd_find_tag(vpd_data, vpd_size, PCI_VPD_LRDT_RO_DATA);
-	if (ro_start < 0) {
-		netif_err(efx, drv, efx->net_dev, "VPD Read-only not found\n");
-		goto out;
-	}
-
-	ro_size = pci_vpd_lrdt_size(&vpd_data[ro_start]);
-	j = ro_size;
-	i = ro_start + PCI_VPD_LRDT_TAG_SIZE;
-	if (i + j > vpd_size)
-		j = vpd_size - i;
-
-	/* Get the Part number */
-	i = pci_vpd_find_info_keyword(vpd_data, i, j, "PN");
-	if (i < 0) {
-		netif_err(efx, drv, efx->net_dev, "Part number not found\n");
-		goto out;
-	}
-
-	j = pci_vpd_info_field_size(&vpd_data[i]);
-	i += PCI_VPD_INFO_FLD_HDR_SIZE;
-	if (i + j > vpd_size) {
-		netif_err(efx, drv, efx->net_dev, "Incomplete part number\n");
-		goto out;
-	}
-
-	netif_info(efx, drv, efx->net_dev,
-		   "Part Number : %.*s\n", j, &vpd_data[i]);
-
-	i = ro_start + PCI_VPD_LRDT_TAG_SIZE;
-	j = ro_size;
-	i = pci_vpd_find_info_keyword(vpd_data, i, j, "SN");
-	if (i < 0) {
-		netif_err(efx, drv, efx->net_dev, "Serial number not found\n");
-		goto out;
-	}
-
-	j = pci_vpd_info_field_size(&vpd_data[i]);
-	i += PCI_VPD_INFO_FLD_HDR_SIZE;
-	if (i + j > vpd_size) {
-		netif_err(efx, drv, efx->net_dev, "Incomplete serial number\n");
-		goto out;
-	}
+	start = pci_vpd_find_ro_info_keyword(vpd_data, vpd_size,
+					     PCI_VPD_RO_KEYWORD_PARTNO, &kw_len);
+	if (start < 0)
+		pci_err(dev, "Part number not found or incomplete\n");
+	else
+		pci_info(dev, "Part Number : %.*s\n", kw_len, vpd_data + start);
 
-	efx->vpd_sn = kmalloc(j + 1, GFP_KERNEL);
-	if (!efx->vpd_sn)
-		goto out;
+	start = pci_vpd_find_ro_info_keyword(vpd_data, vpd_size,
+					     PCI_VPD_RO_KEYWORD_SERIALNO, &kw_len);
+	if (start < 0)
+		pci_err(dev, "Serial number not found or incomplete\n");
+	else
+		efx->vpd_sn = kmemdup_nul(vpd_data + start, kw_len, GFP_KERNEL);
 
-	snprintf(efx->vpd_sn, j + 1, "%s", &vpd_data[i]);
-out:
 	kfree(vpd_data);
 }
 
-- 
2.32.0