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| author | Don Skidmore | 2016-03-09 22:45:00 +0100 |
|---|---|---|
| committer | Jeff Kirsher | 2016-04-05 02:44:50 +0200 |
| commit | dbd15b8f9cc3f0f8d665d048a31c0f4b5c9150a5 (patch) | |
| tree | 4d2c20985c51cd9b73af08d96eea74c07975e465 /drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c | |
| parent | ixgbe: add a callback to set the maximum transmit bitrate (diff) | |
| download | kernel-qcow2-linux-dbd15b8f9cc3f0f8d665d048a31c0f4b5c9150a5.tar.gz kernel-qcow2-linux-dbd15b8f9cc3f0f8d665d048a31c0f4b5c9150a5.tar.xz kernel-qcow2-linux-dbd15b8f9cc3f0f8d665d048a31c0f4b5c9150a5.zip | |
ixgbe: Place SWFW semaphore in known valid state at probe
It is possible on some HW that a system reset could occur when we are
holding the SWFW semaphore lock. So next time the driver was loaded we
would see it incorrectly as locked. This patch will recover from that state
by: Attempting to acquire the semaphore and then regardless of whether or
not it was acquire we immediately release it. This will force us into
a known good state.
Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c')
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c index c00b67b4c1dc..40824d85d807 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c @@ -747,6 +747,25 @@ static void ixgbe_release_swfw_sync_semaphore(struct ixgbe_hw *hw) } /** + * ixgbe_init_swfw_sync_X540 - Release hardware semaphore + * @hw: pointer to hardware structure + * + * This function reset hardware semaphore bits for a semaphore that may + * have be left locked due to a catastrophic failure. + **/ +void ixgbe_init_swfw_sync_X540(struct ixgbe_hw *hw) +{ + /* First try to grab the semaphore but we don't need to bother + * looking to see whether we got the lock or not since we do + * the same thing regardless of whether we got the lock or not. + * We got the lock - we release it. + * We timeout trying to get the lock - we force its release. + */ + ixgbe_get_swfw_sync_semaphore(hw); + ixgbe_release_swfw_sync_semaphore(hw); +} + +/** * ixgbe_blink_led_start_X540 - Blink LED based on index. * @hw: pointer to hardware structure * @index: led number to blink @@ -854,6 +873,7 @@ static const struct ixgbe_mac_operations mac_ops_X540 = { .set_vlan_anti_spoofing = &ixgbe_set_vlan_anti_spoofing, .acquire_swfw_sync = &ixgbe_acquire_swfw_sync_X540, .release_swfw_sync = &ixgbe_release_swfw_sync_X540, + .init_swfw_sync = &ixgbe_init_swfw_sync_X540, .disable_rx_buff = &ixgbe_disable_rx_buff_generic, .enable_rx_buff = &ixgbe_enable_rx_buff_generic, .get_thermal_sensor_data = NULL, |