1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/net/bnx2x/bnx2x_main.c b/drivers/net/bnx2x/bnx2x_main.c
index 150709111548..1f5467f9548c 100644
--- a/drivers/net/bnx2x/bnx2x_main.c
+++ b/drivers/net/bnx2x/bnx2x_main.c
@@ -5798,6 +5798,12 @@ static int bnx2x_init_hw_common(struct bnx2x *bp)
 
         DP(BNX2X_MSG_MCP, "starting common init  func %d\n", BP_ABS_FUNC(bp));
 
+        /*
+         * take the UNDI lock to protect undi_unload flow from accessing
+         * registers while we're resetting the chip
+         */
+        bnx2x_acquire_hw_lock(bp, HW_LOCK_RESOURCE_UNDI);
+
         bnx2x_reset_common(bp);
         REG_WR(bp, GRCBASE_MISC + MISC_REGISTERS_RESET_REG_1_SET, 0xffffffff);
 
@@ -5808,6 +5814,8 @@ static int bnx2x_init_hw_common(struct bnx2x *bp)
         }
         REG_WR(bp, GRCBASE_MISC + MISC_REGISTERS_RESET_REG_2_SET, val);
 
+        bnx2x_release_hw_lock(bp, HW_LOCK_RESOURCE_UNDI);
+
         bnx2x_init_block(bp, BLOCK_MISC, PHASE_COMMON);
 
         if (!CHIP_IS_E1x(bp)) {