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IB/srpt: Ensure that modifying the use_srq configfs attribute works 

The use_srq configfs attribute is created after it is read. Hence
modify srpt_tpg_attrib_use_srq_store() such that this function
switches dynamically between non-SRQ and SRQ mode.

Reported-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Bart Van Assche 2017-11-03 16:20:56 -07:00 committed by Doug Ledford
parent 8b6dc529ea
commit 57b0c46054
1 changed files with 12 additions and 0 deletions
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12
drivers/infiniband/ulp/srpt/ib_srpt.c
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@ -3054,7 +3054,9 @@ static ssize_t srpt_tpg_attrib_use_srq_store(struct config_item *item,
{
struct se_portal_group *se_tpg = attrib_to_tpg(item);
struct srpt_port *sport = srpt_tpg_to_sport(se_tpg);
struct srpt_device *sdev = sport->sdev;
unsigned long val;
bool enabled;
int ret;
ret = kstrtoul(page, 0, &val);
@ -3062,7 +3064,17 @@ static ssize_t srpt_tpg_attrib_use_srq_store(struct config_item *item,
return ret;
if (val != !!val)
return -EINVAL;
ret = mutex_lock_interruptible(&sdev->mutex);
if (ret < 0)
return ret;
enabled = sport->enabled;
/* Log out all initiator systems before changing 'use_srq'. */
srpt_set_enabled(sport, false);
sport->port_attrib.use_srq = val;
srpt_use_srq(sdev, sport->port_attrib.use_srq);
srpt_set_enabled(sport, enabled);
mutex_unlock(&sdev->mutex);
return count;
}