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IB/srp: Make mapping failures easier to debug 

Make it easier to figure out what is going on if memory mapping
fails because more memory regions than mr_per_cmd are needed.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Bart Van Assche 2016-11-21 13:57:41 -08:00 committed by Doug Ledford
parent 3787d9908c
commit 290081b453
1 changed files with 10 additions and 2 deletions
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12
drivers/infiniband/ulp/srp/ib_srp.c
View File

@ -1274,8 +1274,12 @@ static int srp_map_finish_fmr(struct srp_map_state *state,
struct ib_pool_fmr *fmr;
u64 io_addr = 0;
if (state->fmr.next >= state->fmr.end)
if (state->fmr.next >= state->fmr.end) {
shost_printk(KERN_ERR, ch->target->scsi_host,
PFX "Out of MRs (mr_per_cmd = %d)\n",
ch->target->mr_per_cmd);
return -ENOMEM;
}
WARN_ON_ONCE(!dev->use_fmr);
@ -1331,8 +1335,12 @@ static int srp_map_finish_fr(struct srp_map_state *state,
u32 rkey;
int n, err;
if (state->fr.next >= state->fr.end)
if (state->fr.next >= state->fr.end) {
shost_printk(KERN_ERR, ch->target->scsi_host,
PFX "Out of MRs (mr_per_cmd = %d)\n",
ch->target->mr_per_cmd);
return -ENOMEM;
}
WARN_ON_ONCE(!dev->use_fast_reg);