This is a note to let you know that I've just added the patch titled
mwifiex: fix system hang issue in cmd timeout error case
to the 3.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mwifiex-fix-system-hang-issue-in-cmd-timeout-error-case.patch
and it can be found in the queue-3.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From b1a47aa5e1e159e2cb06d7dfcc17ef5149b09299 Mon Sep 17 00:00:00 2001
From: Bing Zhao <[email protected]>
Date: Thu, 15 Nov 2012 15:58:47 -0800
Subject: mwifiex: fix system hang issue in cmd timeout error case
From: Bing Zhao <[email protected]>
commit b1a47aa5e1e159e2cb06d7dfcc17ef5149b09299 upstream.
Reported by Tim Shepard:
I was seeing sporadic failures (wedgeups), and the majority of those
failures I saw printed the printouts in mwifiex_cmd_timeout_func with
cmd = 0xe5 which is CMD_802_11_HS_CFG_ENH. When this happens, two
minutes later I get notified that the rtcwake thread is blocked, like
this:
INFO: task rtcwake:3495 blocked for more than 120 seconds.
To get the hung thread unblocked we wake up the cmd wait queue and
cancel the ioctl.
Reported-by: Tim Shepard <[email protected]>
Signed-off-by: Bing Zhao <[email protected]>
Signed-off-by: John W. Linville <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/net/wireless/mwifiex/cmdevt.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
--- a/drivers/net/wireless/mwifiex/cmdevt.c
+++ b/drivers/net/wireless/mwifiex/cmdevt.c
@@ -887,9 +887,6 @@ mwifiex_cmd_timeout_func(unsigned long f
return;
}
cmd_node = adapter->curr_cmd;
- if (cmd_node->wait_q_enabled)
- adapter->cmd_wait_q.status = -ETIMEDOUT;
-
if (cmd_node) {
adapter->dbg.timeout_cmd_id =
adapter->dbg.last_cmd_id[adapter->dbg.last_cmd_index];
@@ -935,6 +932,14 @@ mwifiex_cmd_timeout_func(unsigned long f
dev_err(adapter->dev, "ps_mode=%d ps_state=%d\n",
adapter->ps_mode, adapter->ps_state);
+
+ if (cmd_node->wait_q_enabled) {
+ adapter->cmd_wait_q.status = -ETIMEDOUT;
+ wake_up_interruptible(&adapter->cmd_wait_q.wait);
+ mwifiex_cancel_pending_ioctl(adapter);
+ /* reset cmd_sent flag to unblock new commands */
+ adapter->cmd_sent = false;
+ }
}
if (adapter->hw_status == MWIFIEX_HW_STATUS_INITIALIZING)
mwifiex_init_fw_complete(adapter);
Patches currently in stable-queue which might be from [email protected] are
queue-3.6/mwifiex-fix-system-hang-issue-in-cmd-timeout-error-case.patch
queue-3.6/mwifiex-report-error-to-mmc-core-if-we-cannot-suspend.patch
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