From: Bart Van Assche Date: Mon, 21 Nov 2016 21:57:41 +0000 (-0800) Subject: IB/srp: Make mapping failures easier to debug X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=290081b45342ef902ed756f929fa9e4feb9f7dab;p=linux-beck.git 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 Signed-off-by: Doug Ledford --- diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c index 81cb27f2f0e6..bb9d73daadfa 100644 --- a/drivers/infiniband/ulp/srp/ib_srp.c +++ b/drivers/infiniband/ulp/srp/ib_srp.c @@ -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);