Re: [PATCHv2] ib_srp: Remove WARN_ON in srp_terminate_io()

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On 10/17/18 12:20 AM, Hannes Reinecke wrote:
The WARN_ON() is pointless as the rport is placed in SDEV_TRANSPORT_OFFLINE
at that time, so no new commands can be submitted via srp_queuecommand()

Signed-off-by: Hannes Reinecke <hare@xxxxxxxx>
Reviewed-by: Jens Axboe <axboe@xxxxxxxxx>
Reviewed-by: Johannes Thumshirn <jthumshirn@xxxxxxxx>
---
  drivers/infiniband/ulp/srp/ib_srp.c | 7 -------
  1 file changed, 7 deletions(-)

diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index 0b34e909505f..5a79444c2f3c 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -1334,13 +1334,6 @@ static void srp_terminate_io(struct srp_rport *rport)
  	struct scsi_device *sdev;
  	int i, j;
- /*
-	 * Invoking srp_terminate_io() while srp_queuecommand() is running
-	 * is not safe. Hence the warning statement below.
-	 */
-	shost_for_each_device(sdev, shost)
-		WARN_ON_ONCE(sdev->request_queue->request_fn_active);
-
  	for (i = 0; i < target->ch_count; i++) {
  		ch = &target->ch[i];

Although I had explained before why I think that warning is not pointless, I agree with this change because the legacy block layer is going away. Anyway:

Acked-by: Bart Van Assche <bvanassche@xxxxxxx>



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