RDMA/srp: Fix srp_abort()

Fix the code for converting a SCSI command pointer into an SRP request
pointer.

Cc: Xiao Yang <yangx.jy@fujitsu.com>
Fixes: ad215aae ("RDMA/srp: Make struct scsi_cmnd and struct srp_request adjacent")
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20220908233139.3042628-1-bvanassche@acm.orgSigned-off-by: Leon Romanovsky <leon@kernel.org>

drivers/infiniband/ulp/srp/ib_srp.c

@@ -2788,7 +2788,7 @@ static int srp_send_tsk_mgmt(struct srp_rdma_ch *ch, u64 req_tag, u64 lun,
 static int srp_abort(struct scsi_cmnd *scmnd)
 {
 	struct srp_target_port *target = host_to_target(scmnd->device->host);
-	struct srp_request *req = (struct srp_request *) scmnd->host_scribble;
+	struct srp_request *req = scsi_cmd_priv(scmnd);
 	u32 tag;
 	u16 ch_idx;
 	struct srp_rdma_ch *ch;
@@ -2796,8 +2796,6 @@ static int srp_abort(struct scsi_cmnd *scmnd)
 
 	shost_printk(KERN_ERR, target->scsi_host, "SRP abort called\n");
 
-	if (!req)
-		return SUCCESS;
 	tag = blk_mq_unique_tag(scsi_cmd_to_rq(scmnd));
 	ch_idx = blk_mq_unique_tag_to_hwq(tag);
 	if (WARN_ON_ONCE(ch_idx >= target->ch_count))