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ixgbe: Fix CS4227-related semaphore error on reset failure 

If the reset never completes, it is necessary to retake the
semaphore before returning, because the caller will release
the semaphore.

Signed-off-by: Mark Rustad <mark.d.rustad@intel.com>
Tested-by: Darin Miller <darin.j.miller@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Mark Rustad 2015-08-26 14:10:22 -07:00 committed by Jeff Kirsher
parent 72bfd32d2f
commit 8bf7a7b879
1 changed files with 9 additions and 0 deletions
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9
drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c
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@ -198,6 +198,7 @@ static s32 ixgbe_write_pe(struct ixgbe_hw *hw, u8 reg, u8 value)
* ixgbe_reset_cs4227 - Reset CS4227 using port expander
* @hw: pointer to hardware structure
*
* This function assumes that the caller has acquired the proper semaphore.
* Returns error code
*/
static s32 ixgbe_reset_cs4227(struct ixgbe_hw *hw)
@ -296,6 +297,14 @@ static void ixgbe_check_cs4227(struct ixgbe_hw *hw)
hw->mac.ops.release_swfw_sync(hw, swfw_mask);
msleep(IXGBE_CS4227_CHECK_DELAY);
}
/* If still pending, assume other instance failed. */
if (retry == IXGBE_CS4227_RETRIES) {
status = hw->mac.ops.acquire_swfw_sync(hw, swfw_mask);
if (status) {
hw_err(hw, "semaphore failed with %d\n", status);
return;
}
}
/* Reset the CS4227. */
status = ixgbe_reset_cs4227(hw);