linux-kernel - RE: [Regression] powerpc/usb: fix issue of CPU halt when missing USB PHY clock

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

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <3F453DDFF675A64A89321A1F3528102170B796@039-SN1MPN1-004.039d.mgd.msft.net>
Date:	Tue, 28 Feb 2012 10:09:56 +0000
From:	Liu Shengzhou-B36685 <B36685@...escale.com>
To:	Ben Collins <benmcollins13@...il.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [Regression] powerpc/usb: fix issue of CPU halt when missing
 USB PHY clock


> -----Original Message-----
> From: Ben Collins [mailto:benmcollins13@...il.com]
> Sent: Tuesday, February 28, 2012 12:11 AM
> To: Liu Shengzhou-B36685
> Cc: linux-kernel@...r.kernel.org
> Subject: [Regression] powerpc/usb: fix issue of CPU halt when missing
> USB PHY clock
> 
> Hello,
> 
> The patch that checks the CTRL_PHY_CLK_VALID bit is failing incorrectly
> on my system (P4080DS). If I revert it, my system goes back to working
> correctly, but as is, it fails and wont allow my USB to work properly.
> 
> I've tried adding a loop to poll this bit 10,000 times with a udelay(1)
> on each loop and it still fails, so it doesn't appear to be a timing
> issue.
> 
> Is this check valid for all systems?
> 

This check is valid for P3060/P3041/P5020/P1023 platform.
on some platforms, there is this bit, but not on other some platforms.
For P4080, just revert this patch, then USB is able to work.
I'll post a new patch to fix it after getting some confirmations from silicon team.

Thanks,
Shengzhou


--
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/