On 17/09/21 7:09 pm, Bart Van Assche wrote:
> On 9/16/21 10:02 AM, Adrian Hunter wrote:
>> -static void ufshcd_request_sense_done(struct request *rq, blk_status_t error)
>> +static int ufshcd_request_sense_direct(struct ufs_hba *hba, u8 wlun)
>> {
> [ ... ]
>> + /* The command queue cannot be frozen */
>> + req = blk_get_request(q, REQ_OP_DRV_OUT, 0);
>
> hba->cmd_queue shares a tag set with the request queues associated with SCSI
> LUNs. Since this blk_get_request() call happens from the context of the error
> handler before SCSI requests are unblocked, it will hang if all tags are
> in use for SCSI requests before the error handler starts.
All the commands sent by ufshcd_probe_hba() take the same approach, so no
difference there.
