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iwlwifi: mvm: ignore LMAC scan notifications when running UMAC scans

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If the firmware sends LMAC scan notifications while a UMAC scan is
running, just WARN and ignore it, otherwise the scanning state gets
messed up.

Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Luca Coelho 2015-11-06 10:57:11 +02:00 committed by Emmanuel Grumbach
parent e7c2e1fdcd
commit 72a3356885
1 changed files with 7 additions and 0 deletions
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7
drivers/net/wireless/intel/iwlwifi/mvm/scan.c
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@ -333,6 +333,13 @@ void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm,
struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data;
bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
/* If this happens, the firmware has mistakenly sent an LMAC
* notification during UMAC scans -- warn and ignore it.
*/
if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa,
IWL_UCODE_TLV_CAPA_UMAC_SCAN)))
return;
/* scan status must be locked for proper checking */
lockdep_assert_held(&mvm->mutex);