# \[PATCH net 3/5\] bnx2x: prevent race between undi\_unload and load flows - From: Dmitry Kravkov \ - Date: 2011-08-09 13:14:20 - List: netdev - Page: https://ratatoskr.run/netdev/2011/08/10876992 - Thread: https://ratatoskr.run/netdev/2011/08/10876992/t.md ```text Signed-off-by: Dmitry Kravkov Signed-off-by: Eilon Greenstein --- drivers/net/bnx2x/bnx2x_main.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/drivers/net/bnx2x/bnx2x_main.c b/drivers/net/bnx2x/bnx2x_main.c index 1507091..1f5467f 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)) { -- 1.7.2.2 ```