From mboxrd@z Thu Jan 1 00:00:00 1970 From: Borislav Petkov Subject: Re: [Bug 49151] New: NULL pointer dereference in pata_acpi Date: Sat, 3 Nov 2012 05:26:35 +0100 Message-ID: <20121103042635.GA21829@liondog.tnic> References: <20121020120047.GC17563@liondog.tnic> <50841CFC.2030802@talktalk.net> <20121021165756.GA20642@liondog.tnic> <50856AA8.1000607@talktalk.net> <20121022202734.GA16169@liondog.tnic> <20121023110549.06f9c2e8@pyramind.ukuu.org.uk> <20121023101751.GA24656@liondog.tnic> <5087B4CA.1030502@talktalk.net> <20121024115746.3d41fce7@pyramind.ukuu.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Return-path: Received: from mail.skyhub.de ([78.46.96.112]:49183 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750893Ab2KCE0k (ORCPT ); Sat, 3 Nov 2012 00:26:40 -0400 Content-Disposition: inline In-Reply-To: <20121024115746.3d41fce7@pyramind.ukuu.org.uk> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Alan Cox Cc: phillip.wood@dunelm.org.uk, phillip.wood@talktalk.net, "Anton V. Boyarshinov" , bugzilla-daemon@bugzilla.kernel.org, linux-ide@vger.kernel.org, Jeff Garzik On Wed, Oct 24, 2012 at 11:57:46AM +0100, Alan Cox wrote: > Which is an ATA layer bug - adev->dma_mode should never be called > without a DMA mode in normal use. Ok, it looks like this would take a while to fix. Alan, what is your suggestion for a proper fix, uncomment XFER_PIO_SLOW and drop to it with a big warning that ACPI is giving botched information on those chips and people should try using the platform-specific driver if they want better/optimal speeds? Thanks. -- Regards/Gruss, Boris.