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path: root/drivers/net/ethernet/intel/igc/igc_i225.c
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Diffstat (limited to 'drivers/net/ethernet/intel/igc/igc_i225.c')
-rw-r--r--drivers/net/ethernet/intel/igc/igc_i225.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/net/ethernet/intel/igc/igc_i225.c b/drivers/net/ethernet/intel/igc/igc_i225.c
index 66ea566488d1..59d5c467ea6e 100644
--- a/drivers/net/ethernet/intel/igc/igc_i225.c
+++ b/drivers/net/ethernet/intel/igc/igc_i225.c
@@ -156,8 +156,15 @@ void igc_release_swfw_sync_i225(struct igc_hw *hw, u16 mask)
{
u32 swfw_sync;
- while (igc_get_hw_semaphore_i225(hw))
- ; /* Empty */
+ /* Releasing the resource requires first getting the HW semaphore.
+ * If we fail to get the semaphore, there is nothing we can do,
+ * except log an error and quit. We are not allowed to hang here
+ * indefinitely, as it may cause denial of service or system crash.
+ */
+ if (igc_get_hw_semaphore_i225(hw)) {
+ hw_dbg("Failed to release SW_FW_SYNC.\n");
+ return;
+ }
swfw_sync = rd32(IGC_SW_FW_SYNC);
swfw_sync &= ~mask;