linux-kernel - Re: iwlagn is getting very shaky

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Message-ID: <20111121232454.GC840@gamma.logic.tuwien.ac.at>
Date:	Tue, 22 Nov 2011 08:24:54 +0900
From:	Norbert Preining <preining@...ic.at>
To:	Emmanuel Grumbach <egrumbach@...il.com>
Cc:	"Guy, Wey-Yi" <wey-yi.w.guy@...el.com>,
	David Rientjes <rientjes@...gle.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"ipw3945-devel@...ts.sourceforge.net" 
	<ipw3945-devel@...ts.sourceforge.net>,
	"ilw@...ux.intel.com" <ilw@...ux.intel.com>,
	"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
	Pekka Enberg <penberg@...helsinki.fi>
Subject: Re: iwlagn is getting very shaky

On Mo, 21 Nov 2011, Emmanuel Grumbach wrote:
> iwlwifi: add debug information on queue stop / wake
> 
> and run with debug flags 0x80000000 (bit 31)
> This will print a message each time a queue is stopped / started.

I have these patches in addition to current git:
--- a/drivers/net/wireless/iwlwifi/iwl-power.c
+++ b/drivers/net/wireless/iwlwifi/iwl-power.c
@@ -436,7 +436,7 @@ int iwl_power_update_mode(struct iwl_priv *priv, bool force)
 /* initialize to default */
 void iwl_power_initialize(struct iwl_priv *priv)
 {
-       priv->power_data.bus_pm = bus_get_pm_support(bus(priv));
+       priv->power_data.bus_pm = false;
 
        priv->power_data.debug_sleep_level_override = -1;
 
diff --git a/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c b/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
index da34110..2df3bac 100644
--- a/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
+++ b/drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
@@ -1512,8 +1512,12 @@ static int iwl_trans_pcie_check_stuck_queue(struct iwl_trans *trans, int cnt)
        if (time_after(jiffies, timeout)) {
                IWL_ERR(trans, "Queue %d stuck for %u ms.\n", q->id,
                        hw_params(trans).wd_timeout);
-               IWL_ERR(trans, "Current read_ptr %d write_ptr %d\n",
+               IWL_ERR(trans, "Current SW read_ptr %d write_ptr %d\n",
                        q->read_ptr, q->write_ptr);
+               IWL_ERR(trans, "Current HW read_ptr %d write_ptr %d\n",
+                       iwl_read_prph(bus(trans), SCD_QUEUE_RDPTR(cnt))
+                               & (TFD_QUEUE_SIZE_MAX - 1),
+                       iwl_read_prph(bus(trans), SCD_QUEUE_WRPTR(cnt)));
                return 1;
        }
 

That is all I get. Is that what you mean?

Related to that this morning at home (not university!) I had the hanging
again, had to remove the module. Always after wake up from ram (s2ram).
There I had in the log:
Nov 22 07:55:32 mithrandir kernel: [ 4536.000032] iwlwifi 0000:06:00.0: Queue 11
 stuck for 10000 ms.
Nov 22 07:55:32 mithrandir kernel: [ 4536.000044] iwlwifi 0000:06:00.0: Current 
SW read_ptr 155 write_ptr 164
Nov 22 07:55:32 mithrandir kernel: [ 4536.000099] iwlwifi 0000:06:00.0: Current HW read_ptr 155 write_ptr 164
Nov 22 07:55:32 mithrandir kernel: [ 4536.000107] iwlwifi 0000:06:00.0: On demand firmware reload
Nov 22 07:55:32 mithrandir kernel: [ 4536.000546] ieee80211 phy1: Hardware restart was requested
Nov 22 07:55:32 mithrandir kernel: [ 4536.000648] iwlwifi 0000:06:00.0: L1 Enabled; Disabling L0S
Nov 22 07:55:32 mithrandir kernel: [ 4536.003755] iwlwifi 0000:06:00.0: Radio type=0x1-0x2-0x0

But somehow it didn't actually start working again.

Best wishes

Norbert
------------------------------------------------------------------------
Norbert Preining            preining@...ist.ac.jp, logic.at, debian.org}
JAIST, Japan                                 TeX Live & Debian Developer
DSA: 0x09C5B094   fp: 14DF 2E6C 0307 BE6D AD76  A9C0 D2BF 4AA3 09C5 B094
------------------------------------------------------------------------
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