netdev - Re: [PATCH] Revert "iwlwifi: mvm: fix scan config command size"

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Date:   Thu, 19 Dec 2019 13:15:32 +0300
From:   Mehmet Akif Tasova <makiftasova@...il.com>
To:     Roman Gilg <subdiff@...il.com>
Cc:     Johannes Berg <johannes.berg@...el.com>,
        Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
        Luca Coelho <luciano.coelho@...el.com>,
        Intel Linux Wireless <linuxwifi@...el.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        Shahar S Matityahu <shahar.s.matityahu@...el.com>,
        Tova Mussai <tova.mussai@...el.com>,
        Ayala Beker <ayala.beker@...el.com>,
        Sara Sharon <sara.sharon@...el.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Revert "iwlwifi: mvm: fix scan config command size"

Hello,

Because I used gmail mobile app to response and the app decided that 
always using HTML is a valid choice for every one, my previous mail 
rejected by mailing lists.

Because of that I am (re)sending this mail. You can find contents of my 
previous mail below.

Regards,
Mehmet Akif.

> Hi Roman,
>
> Unfortunately I don't have XPS 13 and tested the patch on Dell Vostro 
> 5481 and this patch is the result of bisection on Vostro.
>
> At first, the Archlinux bug report I shared looked similar thus that 
> bug report contains lots of dmesg outputs from different users. But 
> yes probably there is 2 distinct issue which should be solved separately.
>
> I will update commit message accordingly as soon as possible.
>
> Regards,
> Mehmet Akif
>
>
> On Wed, Dec 18, 2019, 22:12 Roman Gilg <subdiff@...il.com 
> <mailto:subdiff@...il.com>> wrote:
>
>     On Fri, Dec 13, 2019 at 9:36 PM Mehmet Akif Tasova
>     <makiftasova@...il.com <mailto:makiftasova@...il.com>> wrote:
>     >
>     > Since Linux 5.4.1 released, iwlwifi could not initialize
>     Intel(R) Dual Band
>     > Wireless AC 9462 firmware, failing with following error in dmesg:
>     >
>     > iwlwifi 0000:00:14.3: FW error in SYNC CMD SCAN_CFG_CMD
>     >
>     > whole dmesg output of error can be found at:
>     > https://gist.github.com/makiftasova/354e46439338f4ab3fba0b77ad5c19ec
>     >
>     > also bug report from ArchLinux bug tracker (contains more info):
>     > https://bugs.archlinux.org/task/64703
>
>     Since this bug report is about the Dell XPS 13 2-in1: I tested your
>     revert with this device, but the issue persists at least on this
>     device. So these might be two different issues, one for your device
>     and another one for the XPS.
>
>     > Reverting commit 06eb547c4ae4 ("iwlwifi: mvm: fix scan config
>     command
>     > size") seems to fix this issue  until proper solution is found.
>     >
>     > This reverts commit 06eb547c4ae4382e70d556ba213d13c95ca1801b.
>     >
>     > Signed-off-by: Mehmet Akif Tasova <makiftasova@...il.com
>     <mailto:makiftasova@...il.com>>
>     > ---
>     >  drivers/net/wireless/intel/iwlwifi/mvm/scan.c | 2 +-
>     >  1 file changed, 1 insertion(+), 1 deletion(-)
>     >
>     > diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
>     b/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
>     > index a046ac9fa852..a5af8f4128b1 100644
>     > --- a/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
>     > +++ b/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
>     > @@ -1213,7 +1213,7 @@ static int
>     iwl_mvm_legacy_config_scan(struct iwl_mvm *mvm)
>     >                 cmd_size = sizeof(struct iwl_scan_config_v2);
>     >         else
>     >                 cmd_size = sizeof(struct iwl_scan_config_v1);
>     > -       cmd_size += num_channels;
>     > +       cmd_size += mvm->fw->ucode_capa.n_scan_channels;
>     >
>     >         cfg = kzalloc(cmd_size, GFP_KERNEL);
>     >         if (!cfg)
>     > --
>     > 2.24.1
>     >
>