linux-kernel - Re: [PATCH v2 3/6] ata: libata-scsi: Remove redundant sense

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Date: Tue, 25 Jun 2024 08:22:27 +0200
From: Hannes Reinecke <hare@...e.de>
To: Igor Pylypiv <ipylypiv@...gle.com>, Damien Le Moal <dlemoal@...nel.org>,
 Niklas Cassel <cassel@...nel.org>
Cc: Tejun Heo <tj@...nel.org>, "Martin K. Petersen"
 <martin.petersen@...cle.com>, Jason Yan <yanaijie@...wei.com>,
 linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/6] ata: libata-scsi: Remove redundant sense_buffer
 memsets

On 6/25/24 00:12, Igor Pylypiv wrote:
> SCSI layer clears sense_buffer in scsi_queue_rq() so there is no need for
> libata to clear it again.
> 
> Signed-off-by: Igor Pylypiv <ipylypiv@...gle.com>
> ---
>   drivers/ata/libata-scsi.c | 4 ----
>   1 file changed, 4 deletions(-)
> 
> diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
> index 26b1263f5c7c..1aeab6e1c8b3 100644
> --- a/drivers/ata/libata-scsi.c
> +++ b/drivers/ata/libata-scsi.c
> @@ -929,8 +929,6 @@ static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
>   	unsigned char *sb = cmd->sense_buffer;
>   	u8 sense_key, asc, ascq;
>   
> -	memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
> -
>   	/*
>   	 * Use ata_to_sense_error() to map status register bits
>   	 * onto sense key, asc & ascq.
> @@ -968,8 +966,6 @@ static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
>   	u64 block;
>   	u8 sense_key, asc, ascq;
>   
> -	memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
> -
>   	if (ata_dev_disabled(dev)) {
>   		/* Device disabled after error recovery */
>   		/* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */

Reviewed-by: Hannes Reinecke <hare@...e.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                  Kernel Storage Architect
hare@...e.de                                +49 911 74053 688
SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg
HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich