| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Mon, 9 Apr 2012 19:52:45 +0530 From: Mohammed Shafi <shafi.wireless@...il.com> To: Michael Leun <lkml20120218@...ton.leun.net> Cc: Ben Greear <greearb@...delatech.com>, casteyde.christian@...e.fr, Kelly Anderson <kelly@...ka.with-linux.com>, "ath9k-devel@...ts.ath9k.org" <ath9k-devel@...ema.h4ckr.net>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Felix Fietkau <nbd@...nwrt.org>, linux-wireless Mailing List <linux-wireless@...r.kernel.org>, Sergio Correia <lists@...e.net> Subject: Re: 3.4-rc ath9k regression (Re: [ath9k-devel] 3.3.1 ath9k regression) On Mon, Apr 9, 2012 at 7:33 PM, Michael Leun <lkml20120218@...ton.leun.net> wrote: > On Mon, 9 Apr 2012 12:25:49 +0200 > Michael Leun <lkml20120218@...ton.leun.net> wrote: > >> On Mon, 9 Apr 2012 11:58:06 +0530 >> Mohammed Shafi <shafi.wireless@...il.com> wrote: >> >> > On Mon, Apr 9, 2012 at 4:38 AM, Michael Leun >> > <lkml20120218@...ton.leun.net> wrote: >> > > After an suspend to disk / resume cycle (in kernel suspend to >> > > disk, openSuSE) with 3.4-rc2 my ath9k wireless does not ping >> > > anymore. >> > > >> > > Output of iwconfig wlan0 looks just as usual (associated to AP). >> > > >> > > iwconfig wlan0 essid <myssid> fixes this (causes an >> > > deauthenticate/authenticate with AP) - then connectivity is there >> > > again. >> > > >> > > Guess what: "Of course" does not happen when reverting >> > > c1afdaff90538ef085b756454f12b29575411214 ath9k: fix going to >> > > full-sleep on PS idle. >> > > >> > > So, in my opinion it should be seriously considered to revert that >> > > patch until it is fully understood what is going on and why. >> > >> > please try with the attached patch to see if it helps. >> >> Yes, this patch helps with the issue I see in 3.4-rc2 described above. > > Sorry, but I have to partially rectify that: > > It works, if the time the machine was suspended is short, as it was > when I did that testing. > > But I noticed it failing, when the machine was hibernated for some > hours. > > I easily can reproduce that, when I reboot the AP while the notebook is > down (btw: AP is TP-LINK TL-WR1043ND running OpenWRT backfire 10.03.1, > also using ath9k). > > When I do this (hibernate notebook, reboot AP, resume notebook check > connectivity) with 3.4-rc2 and your test.patch it fails in 100% of > cases. the test.patch is nothing but it reverts back to the code something back 3.1.1 and there is something else is also there , where we need to fix. unfortunately i cannot reproduce the issue in 3.4-rc2 which you guys can easily recreate it. i should try with 3.3.1 tomorrow. i will go home today and see if i can find some thing with my analysis. i was also thinking about the code, when the chip goes to FULL_SLEEP then in ath9k_tx we might need to chip reset to actually tx. my guess is there is something dependent there. i think i can add a patch with some of our debug messages which helps us what is happening for you reverting breaks unassociated power save case :( > > With 3.4-rc2 and c1afdaff90538ef085b756454f12b29575411214 reverted the > same works in 100% of cases. > >> But I agree with Ben and Sergio that it does NOT help with the issue >> in 3.3.1 we all see. > > I mixed up some mails and actually thought Ben had already answered > regarding your patch, but that is not true. > > -- > MfG, > > Michael Leun > -- thanks, shafi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists