bnx2x: Read VPD with pci_vpd_alloc()

Use pci_vpd_alloc() to dynamically allocate a properly sized buffer and
read the full VPD data into it.

This simplifies the code, and we no longer have to make assumptions about
VPD size.

Link: https://lore.kernel.org/r/821a334d-ff9d-386e-5f42-9b620ab3dbfa@gmail.com
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h b/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
index d049948..e789430 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
@@ -2407,7 +2407,6 @@ void bnx2x_igu_clear_sb_gen(struct bnx2x *bp, u8 func, u8 idu_sb_id,
 #define ETH_MAX_RX_CLIENTS_E2          ETH_MAX_RX_CLIENTS_E1H
 #endif
 
-#define BNX2X_VPD_LEN                  128
 #define VENDOR_ID_LEN                  4
 
 #define VF_ACQUIRE_THRESH              3

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
index 2acbc73..9167196 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
@@ -12189,50 +12189,29 @@ static int bnx2x_get_hwinfo(struct bnx2x *bp)
 
 static void bnx2x_read_fwinfo(struct bnx2x *bp)
 {
-       int cnt, i, block_end, rodi;
-       char vpd_start[BNX2X_VPD_LEN+1];
+       int i, block_end, rodi;
        char str_id_reg[VENDOR_ID_LEN+1];
        char str_id_cap[VENDOR_ID_LEN+1];
-       char *vpd_data;
-       char *vpd_extended_data = NULL;
-       u8 len;
+       unsigned int vpd_len;
+       u8 *vpd_data, len;
 
-       cnt = pci_read_vpd(bp->pdev, 0, BNX2X_VPD_LEN, vpd_start);
        memset(bp->fw_ver, 0, sizeof(bp->fw_ver));
 
-       if (cnt < BNX2X_VPD_LEN)
-               goto out_not_found;
+       vpd_data = pci_vpd_alloc(bp->pdev, &vpd_len);
+       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_start, BNX2X_VPD_LEN, PCI_VPD_LRDT_RO_DATA);
+       i = pci_vpd_find_tag(vpd_data, vpd_len, PCI_VPD_LRDT_RO_DATA);
        if (i < 0)
                goto out_not_found;
 
        block_end = i + PCI_VPD_LRDT_TAG_SIZE +
-                   pci_vpd_lrdt_size(&vpd_start[i]);
-
+                   pci_vpd_lrdt_size(&vpd_data[i]);
        i += PCI_VPD_LRDT_TAG_SIZE;
 
-       if (block_end > BNX2X_VPD_LEN) {
-               vpd_extended_data = kmalloc(block_end, GFP_KERNEL);
-               if (vpd_extended_data  == NULL)
-                       goto out_not_found;
-
-               /* read rest of vpd image into vpd_extended_data */
-               memcpy(vpd_extended_data, vpd_start, BNX2X_VPD_LEN);
-               cnt = pci_read_vpd(bp->pdev, BNX2X_VPD_LEN,
-                                  block_end - BNX2X_VPD_LEN,
-                                  vpd_extended_data + BNX2X_VPD_LEN);
-               if (cnt < (block_end - BNX2X_VPD_LEN))
-                       goto out_not_found;
-               vpd_data = vpd_extended_data;
-       } else
-               vpd_data = vpd_start;
-
-       /* now vpd_data holds full vpd content in both cases */
-
        rodi = pci_vpd_find_info_keyword(vpd_data, i, block_end,
                                   PCI_VPD_RO_KEYWORD_MFR_ID);
        if (rodi < 0)
@@ -12258,17 +12237,14 @@ static void bnx2x_read_fwinfo(struct bnx2x *bp)
 
                        rodi += PCI_VPD_INFO_FLD_HDR_SIZE;
 
-                       if (len < 32 && (len + rodi) <= BNX2X_VPD_LEN) {
+                       if (len < 32 && (len + rodi) <= vpd_len) {
                                memcpy(bp->fw_ver, &vpd_data[rodi], len);
                                bp->fw_ver[len] = ' ';
                        }
                }
-               kfree(vpd_extended_data);
-               return;
        }
 out_not_found:
-       kfree(vpd_extended_data);
-       return;
+       kfree(vpd_data);
 }
 
 static void bnx2x_set_modes_bitmap(struct bnx2x *bp)