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

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On 7/4/21 11:46 PM, Avri Altman wrote:
>> 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@xxxxxxxxxxx>
>> Cc: Avri Altman <avri.altman@xxxxxxx>
>> Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
> 
>>  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.



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