From 6bfa24fa3e189269e113197a80e12862c211b3d3 Mon Sep 17 00:00:00 2001 From: Roland Dreier Date: Sat, 17 Jun 2006 20:37:33 -0700 Subject: [PATCH] IB/srp: Get rid of "Target has req_lim 0" messages It's perfectly valid for a connection to an SRP target to have a request limit of 0, so get rid of the message about it, which can spam kernel logs even with printk_ratelimit(). Keep a count of such events in a "zero_req_lim" SCSI host attribute instead, so someone who cares can look at the statistics. Signed-off-by: Roland Dreier --- drivers/infiniband/ulp/srp/ib_srp.c | 21 +++++++++++++++------ drivers/infiniband/ulp/srp/ib_srp.h | 2 ++ 2 files changed, 17 insertions(+), 6 deletions(-) diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c index 4ba790f54a24..f1401e1f2f97 100644 --- a/drivers/infiniband/ulp/srp/ib_srp.c +++ b/drivers/infiniband/ulp/srp/ib_srp.c @@ -894,12 +894,8 @@ static struct srp_iu *__srp_get_tx_iu(struct srp_target_port *target) if (target->tx_head - target->tx_tail >= SRP_SQ_SIZE) return NULL; - if (unlikely(target->req_lim < 1)) { - if (printk_ratelimit()) - printk(KERN_DEBUG PFX "Target has req_lim %d\n", - target->req_lim); - return NULL; - } + if (unlikely(target->req_lim < 1)) + ++target->zero_req_lim; return target->tx_ring[target->tx_head & SRP_SQ_SIZE]; } @@ -1422,11 +1418,23 @@ static ssize_t show_dgid(struct class_device *cdev, char *buf) be16_to_cpu(((__be16 *) target->path.dgid.raw)[7])); } +static ssize_t show_zero_req_lim(struct class_device *cdev, char *buf) +{ + struct srp_target_port *target = host_to_target(class_to_shost(cdev)); + + if (target->state == SRP_TARGET_DEAD || + target->state == SRP_TARGET_REMOVED) + return -ENODEV; + + return sprintf(buf, "%d\n", target->zero_req_lim); +} + static CLASS_DEVICE_ATTR(id_ext, S_IRUGO, show_id_ext, NULL); static CLASS_DEVICE_ATTR(ioc_guid, S_IRUGO, show_ioc_guid, NULL); static CLASS_DEVICE_ATTR(service_id, S_IRUGO, show_service_id, NULL); static CLASS_DEVICE_ATTR(pkey, S_IRUGO, show_pkey, NULL); static CLASS_DEVICE_ATTR(dgid, S_IRUGO, show_dgid, NULL); +static CLASS_DEVICE_ATTR(zero_req_lim, S_IRUGO, show_zero_req_lim, NULL); static struct class_device_attribute *srp_host_attrs[] = { &class_device_attr_id_ext, @@ -1434,6 +1442,7 @@ static struct class_device_attribute *srp_host_attrs[] = { &class_device_attr_service_id, &class_device_attr_pkey, &class_device_attr_dgid, + &class_device_attr_zero_req_lim, NULL }; diff --git a/drivers/infiniband/ulp/srp/ib_srp.h b/drivers/infiniband/ulp/srp/ib_srp.h index 033a44772ae3..ad45e4856e1c 100644 --- a/drivers/infiniband/ulp/srp/ib_srp.h +++ b/drivers/infiniband/ulp/srp/ib_srp.h @@ -138,6 +138,8 @@ struct srp_target_port { int max_ti_iu_len; s32 req_lim; + int zero_req_lim; + unsigned rx_head; struct srp_iu *rx_ring[SRP_RQ_SIZE]; -- 2.25.1