Bug 9954 - iwl3945: not only it periodically dies, it also BUG()s
Summary: iwl3945: not only it periodically dies, it also BUG()s
Status: CLOSED CODE_FIX
Alias: None
Product: Drivers
Classification: Unclassified
Component: network-wireless (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: drivers_network-wireless@kernel-bugs.osdl.org
URL:
Keywords:
Depends on:
Blocks: 9832
  Show dependency tree
 
Reported: 2008-02-13 06:02 UTC by Rafael J. Wysocki
Modified: 2008-03-14 12:05 UTC (History)
2 users (show)

See Also:
Kernel Version: 2.5.25-rc0
Tree: Mainline
Regression: Yes


Attachments

Description Rafael J. Wysocki 2008-02-13 06:02:52 UTC
Subject         : ipw3945: not only it periodically dies, it also BUG()s
Submitter       : Pavel Machek <pavel@ucw.cz>
Date            : 2008-02-05 22:44
References      : http://lkml.org/lkml/2008/2/5/453
Handled-By      : "Chatre, Reinette" <reinette.chatre@intel.com>

This entry is being used for tracking a regression from 2.6.24.  Please don't
close it until the problem is fixed in the mainline.
Comment 1 John W. Linville 2008-02-26 08:20:17 UTC
http://www.bughost.org/bugzilla/show_bug.cgi?id=1620
Comment 2 Natalie Protasevich 2008-03-11 18:06:38 UTC
Date  Tue, 5 Feb 2008 22:44:41 +0100
  From  Pavel Machek <>
  Subject  ipw3945: not only it periodically dies, it also BUG()s
Digg This  Hi!

Under not-even-high load, it periodically restarts:

Feb  5 21:08:50 amd kernel: iwl3945: Microcode SW error detected.
Restarting 0x82000008.
Feb  5 21:08:52 amd kernel: iwl3945: Can't stop Rx DMA.
Feb  5 21:12:51 amd kernel: iwl3945: Microcode SW error detected.
Restarting 0x82000008.
Feb  5 21:12:53 amd kernel: iwl3945: Can't stop Rx DMA.
Feb  5 21:21:44 amd kernel: iwl3945: Microcode SW error detected.
Restarting 0x82000008.
Feb  5 21:21:46 amd kernel: iwl3945: Can't stop Rx DMA.
Feb  5 21:27:32 amd kernel: iwl3945: Microcode SW error detected.
Restarting 0x82000008.
Feb  5 21:27:34 amd kernel: iwl3945: Can't stop Rx DMA.
Feb  5 21:41:29 amd -- MARK --
Feb  5 22:01:29 amd -- MARK --
Feb  5 22:09:11 amd kernel: iwl3945: Microcode SW error detected.
Restarting 0x82000008.
Feb  5 22:09:12 amd kernel: iwl3945: Can't stop Rx DMA.
...I've reported this before, with full debugging. Not sure if
anything happened.

Now, I got BUG() in iwl3945-base.c: 3824

static void iwl3945_tx_cmd_complete(struct iwl3945_priv *priv,
                                struct iwl3945_rx_mem_buffer *rxb)
{
        struct iwl3945_rx_packet *pkt = (struct iwl3945_rx_packet
*)rxb->skb->data;
        u16 sequence = le16_to_cpu(pkt->hdr.sequence);
        int txq_id = SEQ_TO_QUEUE(sequence);
        int index = SEQ_TO_INDEX(sequence);
        int huge = sequence & SEQ_HUGE_FRAME;
        int cmd_index;
        struct iwl3945_cmd *cmd;
        /* If a Tx command is being handled and it isn't in the actual
         * command queue then there a command routing bug has been
introduced
         * in the queue management code. */
        if (txq_id != IWL_CMD_QUEUE_NUM)
                IWL_ERROR("Error wrong command queue %d command id
0x%X\n",
                          txq_id, pkt->hdr.cmd);
        BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Here. Any ideas?

More work on debugging of this bug:

http://www.bughost.org/bugzilla/show_bug.cgi?id=1593
Comment 3 Rafael J. Wysocki 2008-03-14 12:05:14 UTC
Pavel said:

"I only seen the BUG() once. iwl3945 seems to work slightly better, big
part of problem was CGROUP_SCHED... All problems with iwl are not
solved, but it probably works as well as it did in 2.6.24 now..."

Closing.

Note You need to log in before you can comment on or make changes to this bug.