From 8bf7a7b879985321c63e3ae46fee4e7f0d654ab1 Mon Sep 17 00:00:00 2001 From: Mark Rustad Date: Wed, 26 Aug 2015 14:10:22 -0700 Subject: [PATCH] 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 Tested-by: Darin Miller Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c index ed7b289..06b15edd 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_x550.c @@ -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); -- 2.7.4