[PATCH net-next 1/3] igb: Add counter to i21x doublecheck
From: Tony Nguyen <anthony.l.nguyen@intel.com>
Date: 2021-07-23 17:06:00
Subsystem:
intel ethernet drivers, networking drivers, the rest · Maintainers:
Tony Nguyen, Przemek Kitszel, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Grzegorz Siwik <redacted> Add failed_counter to i21x_doublecheck(). There is possibility that loop will never end. With this patch the loop will stop after maximum 3 retries to write to MTA_REGISTER Signed-off-by: Grzegorz Siwik <redacted> Tested-by: Tony Brelinski <redacted> Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com> --- drivers/net/ethernet/intel/igb/e1000_mac.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/intel/igb/e1000_mac.c b/drivers/net/ethernet/intel/igb/e1000_mac.c
index e63ee3cca5ea..1277c5c7d099 100644
--- a/drivers/net/ethernet/intel/igb/e1000_mac.c
+++ b/drivers/net/ethernet/intel/igb/e1000_mac.c@@ -492,6 +492,7 @@ static u32 igb_hash_mc_addr(struct e1000_hw *hw, u8 *mc_addr) **/ static void igb_i21x_hw_doublecheck(struct e1000_hw *hw) { + int failed_cnt = 3; bool is_failed; int i;
@@ -502,9 +503,12 @@ static void igb_i21x_hw_doublecheck(struct e1000_hw *hw) is_failed = true; array_wr32(E1000_MTA, i, hw->mac.mta_shadow[i]); wrfl(); - break; } } + if (is_failed && --failed_cnt <= 0) { + hw_dbg("Failed to update MTA_REGISTER, too many retries"); + break; + } } while (is_failed); }
--
2.26.2