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| author | Sara Sharon <sara.sharon@intel.com> | 2020-11-07 11:50:11 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-12-30 13:25:38 +0300 |
| commit | c750d08b192e0eebcc21b1265a771be7df096987 (patch) | |
| tree | 34f6ba8fbdf0da924d1a420cff5e73b7647fc9b4 /drivers/net/wireless | |
| parent | 217f50dd949d385389548039cb7270ed9c2309f9 (diff) | |
| download | linux-c750d08b192e0eebcc21b1265a771be7df096987.tar.xz | |
iwlwifi: mvm: fix kernel panic in case of assert during CSA
[ Upstream commit fe56d05ee6c87f6a1a8c7267affd92c9438249cc ]
During CSA, we briefly nullify the phy context, in __iwl_mvm_unassign_vif_chanctx.
In case we have a FW assert right after it, it remains NULL though.
We end up running into endless loop due to mac80211 trying repeatedly to
move us to ASSOC state, and we keep returning -EINVAL. Later down the road
we hit a kernel panic.
Detect and avoid this endless loop.
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/iwlwifi.20201107104557.d64de2c17bff.Iedd0d2afa20a2aacba5259a5cae31cb3a119a4eb@changeid
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/net/wireless')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c index 525b26e0f65e..2fad20c845b4 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c @@ -2880,7 +2880,7 @@ static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw, /* this would be a mac80211 bug ... but don't crash */ if (WARN_ON_ONCE(!mvmvif->phy_ctxt)) - return -EINVAL; + return test_bit(IWL_MVM_STATUS_HW_RESTART_REQUESTED, &mvm->status) ? 0 : -EINVAL; /* * If we are in a STA removal flow and in DQA mode: |