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Revert "IB/srp: Avoid that a cable pull can trigger a kernel crash" 

The caller of srp_ib_lookup_path() is responsible for holding a reference
on the SCSI host. That means that commit 8a0d18c621 was not necessary.
Hence revert it.

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Bart Van Assche 2018-02-23 14:09:25 -08:00 committed by Jason Gunthorpe
parent e68088e78d
commit c74ff7501e
1 changed files with 6 additions and 19 deletions
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25
drivers/infiniband/ulp/srp/ib_srp.c
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@ -765,19 +765,12 @@ static void srp_path_rec_completion(int status,
static int srp_ib_lookup_path(struct srp_rdma_ch *ch)
{
struct srp_target_port *target = ch->target;
int ret = -ENODEV;
int ret;
ch->ib_cm.path.numb_path = 1;
init_completion(&ch->done);
/*
* Avoid that the SCSI host can be removed by srp_remove_target()
* before srp_path_rec_completion() is called.
*/
if (!scsi_host_get(target->scsi_host))
goto out;
ch->ib_cm.path_query_id = ib_sa_path_rec_get(&srp_sa_client,
target->srp_host->srp_dev->dev,
target->srp_host->port,
@ -791,27 +784,21 @@ static int srp_ib_lookup_path(struct srp_rdma_ch *ch)
GFP_KERNEL,
srp_path_rec_completion,
ch, &ch->ib_cm.path_query);
ret = ch->ib_cm.path_query_id;
if (ret < 0)
goto put;
if (ch->ib_cm.path_query_id < 0)
return ch->ib_cm.path_query_id;
ret = wait_for_completion_interruptible(&ch->done);
if (ret < 0)
goto put;
return ret;
ret = ch->status;
if (ret < 0)
if (ch->status < 0)
shost_printk(KERN_WARNING, target->scsi_host,
PFX "Path record query failed: sgid %pI6, dgid %pI6, pkey %#04x, service_id %#16llx\n",
ch->ib_cm.path.sgid.raw, ch->ib_cm.path.dgid.raw,
be16_to_cpu(target->ib_cm.pkey),
be64_to_cpu(target->ib_cm.service_id));
put:
scsi_host_put(target->scsi_host);
out:
return ret;
return ch->status;
}
static int srp_rdma_lookup_path(struct srp_rdma_ch *ch)