linux-kernel - RE: [PATCH v6 01/15] scsi: ufs: clear UTRD, UPIU req and rsp before new transfers

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Message-ID: <5B8DA87D05A7694D9FA63FD143655C1B41E4C272@hasmsx108.ger.corp.intel.com>
Date:	Mon, 2 Nov 2015 19:33:01 +0000
From:	"Winkler, Tomas" <tomas.winkler@...el.com>
To:	Yaniv Gardi <ygardi@...eaurora.org>,
	"robherring2@...il.com" <robherring2@...il.com>,
	"James.Bottomley@...senPartnership.com" 
	<James.Bottomley@...senPartnership.com>,
	"pebolle@...cali.nl" <pebolle@...cali.nl>,
	"hch@...radead.org" <hch@...radead.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
	"linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
	"santoshsy@...il.com" <santoshsy@...il.com>,
	"linux-scsi-owner@...r.kernel.org" <linux-scsi-owner@...r.kernel.org>,
	"subhashj@...eaurora.org" <subhashj@...eaurora.org>,
	"gbroner@...eaurora.org" <gbroner@...eaurora.org>,
	"draviv@...eaurora.org" <draviv@...eaurora.org>,
	Maya Erez <merez@...eaurora.org>,
	Vinayak Holikatti <vinholikatti@...il.com>,
	"James E.J. Bottomley" <JBottomley@...n.com>
Subject: RE: [PATCH v6 01/15] scsi: ufs: clear UTRD, UPIU req and rsp before
 new transfers



> +	cdb_len = min_t(unsigned short, lrbp->cmd->cmd_len, MAX_CDB_SIZE);
> +	memcpy(ucd_req_ptr->sc.cdb, lrbp->cmd->cmnd, cdb_len);
> +	if (cdb_len < MAX_CDB_SIZE)
> +		memset(ucd_req_ptr->sc.cdb + cdb_len, 0,
> +		       (MAX_CDB_SIZE - cdb_len));
It's just 16 bytes, setting all to zero prior  to copy will be as good as this if statement
memset(ucd_req_ptr->sc.cdb, 0, MAX_CDB_SIZE);


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