Re: [PATCH 10/21] ufs: Remove ufshcd_valid_tag()

On 7/4/21 11:46 PM, Avri Altman wrote:

quoted

scsi_add_host() allocates shost->can_queue tags. ufshcd_init() sets
shost->can_queue to hba->nutrs. In other words, we know that tag values
will be in the range [0, hba->nutrs). Hence remove the checks that
verify that blk_get_request() returns a tag in this range. This check
was introduced by commit 14497328b6a6 ("scsi: ufs: verify command tag
validity").

Cc: Alim Akhtar <alim.akhtar@samsung.com>
Cc: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>

quoted

 static int ufshcd_abort(struct scsi_cmnd *cmd)
 {
-       struct Scsi_Host *host;
-       struct ufs_hba *hba;
+       struct Scsi_Host *host = cmd->device->host;
+       struct ufs_hba *hba = shost_priv(host);
+       unsigned int tag = cmd->request->tag;
+       struct ufshcd_lrb *lrbp = &hba->lrb[tag];
        unsigned long flags;
-       unsigned int tag;
        int err = 0;
-       struct ufshcd_lrb *lrbp;
        u32 reg;

-       host = cmd->device->host;
-       hba = shost_priv(host);
-       tag = cmd->request->tag;
-       lrbp = &hba->lrb[tag];

lrbp is used below ?
if (lrbp->lun == UFS_UPIU_UFS_DEVICE_WLUN) ...

Hi Avri,

The lrbp assignment is preserved but it has been moved up to the
declaration block.

Bart.