tg3: Dynamically allocate VPD data memory

This patch eases stack pressure by dynamically allocating the memory
used to temporarily store VPD data.

Reviewed-by: Benjamin Li <benli@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 11 insertions, 4 deletions

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index a4fbe4f85ff..0d0deaae5f4 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -12415,14 +12415,18 @@ skip_phy_reset:
 
 static void __devinit tg3_read_vpd(struct tg3 *tp)
 {
-        u8 vpd_data[TG3_NVM_VPD_LEN];
+        u8 *vpd_data;
         unsigned int block_end, rosize, len;
         int j, i = 0;
         u32 magic;
 
         if ((tp->tg3_flags3 & TG3_FLG3_NO_NVRAM) ||
             tg3_nvram_read(tp, 0x0, &magic))
-                goto out_not_found;
+                goto out_no_vpd;
+
+        vpd_data = kmalloc(TG3_NVM_VPD_LEN, GFP_KERNEL);
+        if (!vpd_data)
+                goto out_no_vpd;
 
         if (magic == TG3_EEPROM_MAGIC) {
                 for (i = 0; i < TG3_NVM_VPD_LEN; i += 4) {
@@ -12506,9 +12510,12 @@ partno:
 
         memcpy(tp->board_part_number, &vpd_data[i], len);
 
-        return;
-
 out_not_found:
+        kfree(vpd_data);
+        if (!tp->board_part_number[0])
+                return;
+
+out_no_vpd:
         if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5906)
                 strcpy(tp->board_part_number, "BCM95906");
         else if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57780 &&