iwlwifi: Fix softirq/hardirq disabling in iwl_pcie_gen2_enqueue_hcmd() upstream commit e7020bb068d8be50a92f48e36b236a1a1ef9282e, backport for linux-5.4.y and linux-4.19.y (booted and ping tested) Signed-off-by: Jari Ruusu jariruusu@protonmail.com

--- a/drivers/net/wireless/intel/iwlwifi/pcie/tx-gen2.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/tx-gen2.c @@ -705,6 +705,7 @@ static int iwl_pcie_gen2_enqueue_hcmd(struct iwl_trans *trans, const u8 *cmddata[IWL_MAX_CMD_TBS_PER_TFD]; u16 cmdlen[IWL_MAX_CMD_TBS_PER_TFD]; struct iwl_tfh_tfd *tfd; + unsigned long flags2;

copy_size = sizeof(struct iwl_cmd_header_wide); cmd_size = sizeof(struct iwl_cmd_header_wide); @@ -773,14 +774,14 @@ static int iwl_pcie_gen2_enqueue_hcmd(struct iwl_trans *trans, goto free_dup_buf; }

- spin_lock_bh(&txq->lock); + spin_lock_irqsave(&txq->lock, flags2);

idx = iwl_pcie_get_cmd_index(txq, txq->write_ptr); tfd = iwl_pcie_get_tfd(trans, txq, txq->write_ptr); memset(tfd, 0, sizeof(*tfd));

if (iwl_queue_space(trans, txq) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) { - spin_unlock_bh(&txq->lock); + spin_unlock_irqrestore(&txq->lock, flags2);

IWL_ERR(trans, "No space in command queue\n"); iwl_op_mode_cmd_queue_full(trans->op_mode); @@ -915,7 +916,7 @@ static int iwl_pcie_gen2_enqueue_hcmd(struct iwl_trans *trans, spin_unlock_irqrestore(&trans_pcie->reg_lock, flags);

out: - spin_unlock_bh(&txq->lock); + spin_unlock_irqrestore(&txq->lock, flags2); free_dup_buf: if (idx < 0) kfree(dup_buf);

-- Jari Ruusu  4096R/8132F189 12D6 4C3A DCDA 0AA4 27BD  ACDF F073 3C80 8132 F189