wifi: iwlwifi: avoid scheduling restart during restart

When a restart is in progress, it can be async due to the next
worker being scheduled in mac80211 (restart work) or the driver
itself (reprobe). Avoid scheduling another restart during this
period.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20250430151952.db428503ec3c.I3f2be3d72a9d40cfb4e697cdab1cd2866a9262bc@changeid

diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-trans.c b/drivers/net/wireless/intel/iwlwifi/iwl-trans.c
index c1607b6..75d7002 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/iwl-trans.c
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-trans.c
@@ -393,6 +393,8 @@ int iwl_trans_start_hw(struct iwl_trans *trans)
 {
        might_sleep();
 
+       clear_bit(STATUS_TRANS_RESET_IN_PROGRESS, &trans->status);
+
        return iwl_trans_pcie_start_hw(trans);
 }
 IWL_EXPORT_SYMBOL(iwl_trans_start_hw);

diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h
index b9dc1b8..8fae7f5 100644 (file)
--- a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h
@@ -304,6 +304,8 @@ enum iwl_d3_status {
  *     via iwl_trans_finish_sw_reset()
  * @STATUS_RESET_PENDING: reset worker was scheduled, but didn't dump
  *     the firmware state yet
+ * @STATUS_TRANS_RESET_IN_PROGRESS: reset is still in progress, don't
+ *     attempt another reset yet
  */
 enum iwl_trans_status {
        STATUS_SYNC_HCMD_ACTIVE,
@@ -317,6 +319,7 @@ enum iwl_trans_status {
        STATUS_SUPPRESS_CMD_ERROR_ONCE,
        STATUS_IN_SW_RESET,
        STATUS_RESET_PENDING,
+       STATUS_TRANS_RESET_IN_PROGRESS,
 };
 
 static inline int
@@ -1152,6 +1155,9 @@ static inline void iwl_trans_schedule_reset(struct iwl_trans *trans,
 {
        if (test_bit(STATUS_TRANS_DEAD, &trans->status))
                return;
+       /* clear this on device init, not cleared on any unbind/reprobe */
+       if (test_and_set_bit(STATUS_TRANS_RESET_IN_PROGRESS, &trans->status))
+               return;
 
        trans->restart.mode.type = type;
        trans->restart.mode.context = IWL_ERR_CONTEXT_WORKER;