From effd4d9aece9184f526e6556786a94d335e38b71 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Thu, 15 Sep 2011 11:46:52 -0700 Subject: iwlagn: do not use interruptible waits Since the dawn of its time, iwlwifi has used interruptible waits to wait for synchronous commands and firmware loading. This leads to "interesting" bugs, because it can't actually handle the interruptions; for example when a command sending is interrupted it will assume the command completed fully, and then leave it pending, which leads to all kinds of trouble when the command finishes later. Since there's no easy way to gracefully deal with interruptions, fix the driver to not use interruptible waits. This at least fixes the error iwlagn 0000:02:00.0: Error: Response NULL in 'REPLY_SCAN_ABORT_CMD' I have seen in P2P testing, but it is likely that there are other errors caused by this. Cc: Stanislaw Gruszka Cc: stable@kernel.org [2.6.24+] Signed-off-by: Johannes Berg Signed-off-by: Wey-Yi Guy Signed-off-by: John W. Linville --- drivers/net/wireless/iwlwifi/iwl-trans-pcie-tx.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/net/wireless/iwlwifi/iwl-trans-pcie-tx.c') diff --git a/drivers/net/wireless/iwlwifi/iwl-trans-pcie-tx.c b/drivers/net/wireless/iwlwifi/iwl-trans-pcie-tx.c index 93d22c470e2f..62c00523b3bf 100644 --- a/drivers/net/wireless/iwlwifi/iwl-trans-pcie-tx.c +++ b/drivers/net/wireless/iwlwifi/iwl-trans-pcie-tx.c @@ -946,7 +946,7 @@ void iwl_tx_cmd_complete(struct iwl_trans *trans, struct iwl_rx_mem_buffer *rxb) clear_bit(STATUS_HCMD_ACTIVE, &trans->shrd->status); IWL_DEBUG_INFO(trans, "Clearing HCMD_ACTIVE for command %s\n", get_cmd_string(cmd->hdr.cmd)); - wake_up_interruptible(&trans->shrd->wait_command_queue); + wake_up(&trans->shrd->wait_command_queue); } meta->flags = 0; @@ -1032,7 +1032,7 @@ static int iwl_send_cmd_sync(struct iwl_trans *trans, struct iwl_host_cmd *cmd) return ret; } - ret = wait_event_interruptible_timeout(trans->shrd->wait_command_queue, + ret = wait_event_timeout(trans->shrd->wait_command_queue, !test_bit(STATUS_HCMD_ACTIVE, &trans->shrd->status), HOST_COMPLETE_TIMEOUT); if (!ret) { -- cgit v1.2.3