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| author | Kevin Mitchell <kevmitch@arista.com> | 2022-05-17 11:01:05 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-05-25 09:10:40 +0200 |
| commit | f23315f812b6f5318eb707fb22f0a887608d8309 (patch) | |
| tree | 8f00a31d04c88e0dfd6952bfe71e96f6ab4733c9 | |
| parent | 047794b3cfaff4313f379d0cb0509f1c0b972e26 (diff) | |
| download | linux-stable-f23315f812b6f5318eb707fb22f0a887608d8309.tar.gz linux-stable-f23315f812b6f5318eb707fb22f0a887608d8309.tar.bz2 linux-stable-f23315f812b6f5318eb707fb22f0a887608d8309.zip | |
igb: skip phy status check where unavailable
[ Upstream commit 942d2ad5d2e0df758a645ddfadffde2795322728 ]
igb_read_phy_reg() will silently return, leaving phy_data untouched, if
hw->ops.read_reg isn't set. Depending on the uninitialized value of
phy_data, this led to the phy status check either succeeding immediately
or looping continuously for 2 seconds before emitting a noisy err-level
timeout. This message went out to the console even though there was no
actual problem.
Instead, first check if there is read_reg function pointer. If not,
proceed without trying to check the phy status register.
Fixes: b72f3f72005d ("igb: When GbE link up, wait for Remote receiver status condition")
Signed-off-by: Kevin Mitchell <kevmitch@arista.com>
Tested-by: Gurucharan <gurucharanx.g@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/intel/igb/igb_main.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index 74b50f17832d..a93edd31011f 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -5346,7 +5346,8 @@ static void igb_watchdog_task(struct work_struct *work) break; } - if (adapter->link_speed != SPEED_1000) + if (adapter->link_speed != SPEED_1000 || + !hw->phy.ops.read_reg) goto no_wait; /* wait for Remote receiver status OK */ |