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igb: Add counter to i21x doublecheck 

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 <grzegorz.siwik@intel.com>
Tested-by: Tony Brelinski <tonyx.brelinski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Grzegorz Siwik 2021-04-30 14:41:30 +02:00 committed by Tony Nguyen
parent 356ae88f83
commit 07be39e32d
1 changed files with 5 additions and 1 deletions
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6
drivers/net/ethernet/intel/igb/e1000_mac.c
View File

@ -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);
}