linux-kernel - Re: [PATCH] sata_sis: fix flags handling for the secondary port

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Date:	Mon, 23 Oct 2006 12:33:53 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	Tejun Heo <htejun@...il.com>
CC:	jeff@...zik.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-ide@...r.kernel.org
Subject: Re: [PATCH] sata_sis: fix flags handling for the secondary port

Tejun Heo wrote:
> sis_init_one() modifies probe_ent->port_flags after allocating and
> initializing it using ata_pci_init_native_mode().  This makes
> port_flags for the secondary port (probe_ent->pinfo2->flags) go out of
> sync resulting in misdetection of device due to incorrectly
> initialized SCR access flag.
> 
> This patch make probe_ent alloc/init happen after the final port flags
> value is determined.  This is fragile but probe_ent and all the
> related mess are scheduled to go away soon for exactly this reason.
> We just need to hold everything together till then.
> 
> This has been spotted and diagnosed by Patrick McHardy.
> 
> Signed-off-by: Tejun Heo <htejun@...il.com>
> Cc: Patric McHardy <kaber@...sh.net>
> ---
> Patrick, can you test this patch and post result?


The patch fixes the problem, both ports are properly detected and work
fine. Thanks Tejun.

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