From: Andrew Morton <akpm@osdl.org>
To: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: bzolnier@gmail.com, linux-ide@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] ide_dma_speed() fixes
Date: Sun, 14 May 2006 05:05:48 -0700 [thread overview]
Message-ID: <20060514050548.5399e3f4.akpm@osdl.org> (raw)
In-Reply-To: <4463F4C8.9080608@ru.mvista.com>
Sergei Shtylyov <sshtylyov@ru.mvista.com> wrote:
>
> ide_dma_speed() fails to actually honor the IDE drivers' mode support
> masks) because of the bogus checks -- thus, selecting the DMA transfer mode
> that the driver explicitly refuses to support is possible. Additionally, there
> is no check for validity of the UltraDMA mode data in the drive ID, and the
> function is misdocumented.
drivers/ide/ide-lib.c: In function `ide_dma_speed':
drivers/ide/ide-lib.c:86: warning: `ultra_mask' might be used uninitialized in this function
Looks like a real bug to me - it depends up on the values of `mode' and
id->field_value.
Anyway, I'll drop it, please review and fix. I assume that warning was
occurring for you as well - please spend more time over these things.
Especially when working on IDE, where bugs are slow to show themselves and
have particularly bad consequences.
next prev parent reply other threads:[~2006-05-14 12:09 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-12 2:36 [PATCH] ide_dma_speed() fixes Sergei Shtylyov
2006-05-14 12:05 ` Andrew Morton [this message]
2006-05-15 13:44 ` Sergei Shtylyov
2006-05-15 14:08 ` Alan Cox
2006-05-15 15:00 ` Andrew Morton
2006-05-15 15:27 ` Alan Cox
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