From: Mordechay Goodstein Date: Wed, 9 Dec 2020 21:16:18 +0000 (+0200) Subject: iwlwifi: avoid endless HW errors at assert time X-Git-Tag: io_uring-5.11-2020-12-23~79^2~32^2~13^2~33 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=861bae42e1f125a5a255ace3ccd731e59f58ddec;p=linux-block.git iwlwifi: avoid endless HW errors at assert time Curretly we only mark HW error state "after" trying to collect HW data, but if any HW error happens while colleting HW data we go into endless loop. avoid this by setting HW error state "before" collecting HW data. Signed-off-by: Mordechay Goodstein Signed-off-by: Luca Coelho Link: https://lore.kernel.org/r/iwlwifi.20201209231352.4c7e5a87da15.Ic35b2f28ff08f7ac23143c80f224d52eb97a0454@changeid Signed-off-by: Luca Coelho --- diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c index da55133f1a2d..70b3b9797c2d 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/ops.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/ops.c @@ -1298,6 +1298,12 @@ void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error) } else if (mvm->fwrt.cur_fw_img == IWL_UCODE_REGULAR && mvm->hw_registered && !test_bit(STATUS_TRANS_DEAD, &mvm->trans->status)) { + /* This should be first thing before trying to collect any + * data to avoid endless loops if any HW error happens while + * collecting debug data. + */ + set_bit(IWL_MVM_STATUS_HW_RESTART_REQUESTED, &mvm->status); + if (mvm->fw->ucode_capa.error_log_size) { u32 src_size = mvm->fw->ucode_capa.error_log_size; u32 src_addr = mvm->fw->ucode_capa.error_log_addr; @@ -1316,7 +1322,6 @@ void iwl_mvm_nic_restart(struct iwl_mvm *mvm, bool fw_error) if (fw_error && mvm->fw_restart > 0) mvm->fw_restart--; - set_bit(IWL_MVM_STATUS_HW_RESTART_REQUESTED, &mvm->status); ieee80211_restart_hw(mvm->hw); } }