Re: Linux-6.5 iwlwifi crash

[Larry Finger]

On 7/7/23 03:43, Linux regression tracking (Thorsten Leemhuis) wrote:
> Hi, Thorsten here, the Linux kernel's regression tracker. Top-posting
> for once, to make this easily accessible to everyone.
>
> Jeff, thx for bisecting. Johannes afaik is unavailable for a while
> (CCing him nevertheless), hence:
>
> Gregory, could you please take a look at this? And maybe provide a few
> hints for Jeff how to generate more data that allows us to find the root
> of the problem?
>
> Jeff, btw, the iwlwifi bug reporting guide (
> https://wireless.wiki.kernel.org/en/users/drivers/iwlwifi/debugging
> ) says to file a bugs in http://bugzilla.kernel.org/ Might be wise to do
> this in case Gregory is also unavailable, but instructed someone to keep
> an eye on things there.
>
> Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
> --
> Everything you wanna know about Linux kernel regression tracking:
> https://linux-regtracking.leemhuis.info/about/#tldr
> If I did something stupid, please tell me, as explained on that page.
>
> On 07.07.23 03:56, Jeff Chua wrote:
> > On Thu, Jul 6, 2023 at 2:11 AM Larry Finger <Larry.Finger@xxxxxxxxxxxx> wrote:
> >
> > > Fow what it is worth, my 6.4-git (6.5-rc0?) commit d528014517f2 (pulled today)
> > > is working OK with iwlmvm. Lspci says my device is
> > >
> > > 04:00.0 Network controller [0280]: Intel Corporation Wireless 7260 [8086:08b1]
> > > (rev 73)
> > >
> > > I think you do need to do a bisection.
> > > Larry
> >
> >
> > Larry,
> >
> > I did a bisect and here's what it came up with ... reverted the
> > following and iwlwiifi worked again.
> >
> >
> > 19898ce9cf8a33e0ac35cb4c7f68de297cc93cb2 is the first bad commit
> > commit 19898ce9cf8a33e0ac35cb4c7f68de297cc93cb2
> > Author: Johannes Berg <johannes.berg@xxxxxxxxx>
> > Date:   Wed Jun 21 13:12:07 2023 +0300
> >
> >      wifi: iwlwifi: split 22000.c into multiple files
> >
> >      Split the configuration list in 22000.c into four new files,
> >      per new device family, so we don't have this huge unusable
> >      file. Yes, this duplicates a few small things, but that's
> >      still much better than what we have now.
> >
> >      Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
> >      Signed-off-by: Gregory Greenman <gregory.greenman@xxxxxxxxx>
> >      Link: https://lore.kernel.org/r/20230621130443.7543603b2ee7.Ia8dd54216d341ef1ddc0531f2c9aa30d30536a5d@changeid
> >      Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>

Jeff,

I am certainly no expert on iwlwifi, but this change looks suspicious:

@@ -10,8 +10,7 @@
 #include "fw/api/txq.h"

 /* Highest firmware API version supported */
-#define IWL_22000_UCODE_API_MAX        81
-#define IWL_22500_UCODE_API_MAX        77
+#define IWL_22000_UCODE_API_MAX        77

 /* Lowest firmware API version supported */

The parameter that was originally set to 81 is now set to 77.

Please try the attached patch.

Larry
diff --git a/drivers/net/wireless/cisco/airo.c b/drivers/net/wireless/cisco/airo.c
index beee09dd958c..4ca6a1ba78e8 100644
--- a/drivers/net/wireless/cisco/airo.c
+++ b/drivers/net/wireless/cisco/airo.c
@@ -6156,7 +6156,7 @@ static int airo_get_rate(struct net_device *dev,
 {
 	struct iw_param *vwrq = &wrqu->bitrate;
 	struct airo_info *local = dev->ml_priv;
-	StatusRid status_rid;		/* Card status info */
+	StatusRid status_rid = {};		/* Card status info */
 
 	readStatusRid(local, &status_rid, 1);
 
diff --git a/drivers/net/wireless/intel/iwlwifi/cfg/22000.c b/drivers/net/wireless/intel/iwlwifi/cfg/22000.c
index aa4320ca4c30..d3e70c33fbcf 100644
--- a/drivers/net/wireless/intel/iwlwifi/cfg/22000.c
+++ b/drivers/net/wireless/intel/iwlwifi/cfg/22000.c
@@ -10,7 +10,7 @@
 #include "fw/api/txq.h"
 
 /* Highest firmware API version supported */
-#define IWL_22000_UCODE_API_MAX	77
+#define IWL_22000_UCODE_API_MAX	81
 
 /* Lowest firmware API version supported */
 #define IWL_22000_UCODE_API_MIN	50