linux-kernel - Re: [PATCH v2] libata: add support for NCQ commands for SG interface

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <5649DE67.7080509@start.ca>
Date:	Mon, 16 Nov 2015 08:47:19 -0500
From:	Mark Lord <kernel@...rt.ca>
To:	vinayak.kale@...il.com, tj@...nel.org, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	sumit.g.gupta@...gate.com, Vinayak Kale <vinayak.kale@...gate.com>
Subject: Re: [PATCH v2] libata: add support for NCQ commands for SG interface

On 15-10-27 01:49 AM, vinayak.kale@...il.com wrote:
> From: Vinayak Kale <vinayak.kale@...gate.com>
>
> This patch is needed to make NCQ commands with FPDMA protocol value
> (eg READ/WRITE FPDMA) work over SCSI Generic (SG) interface.
..
> +	/* For NCQ commands with FPDMA protocol, copy the tag value */
> +	if (tf->protocol == ATA_PROT_NCQ)
> +		tf->nsect = qc->tag << 3;
> +


What prevents the qc-tag value here from conflicting with in-flight I/O
using the exact same qc-tag ??
--
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/