IB/qib: Correct nfreectxts for multiple HCAs
The code that was recently introduced to report the number
of free contexts is flawed for multiple HCAs:
/* Return the number of free user ports (contexts) available. */
return scnprintf(buf, PAGE_SIZE, "%u\n", dd->cfgctxts -
dd->first_user_ctxt - (u32)qib_stats.sps_ctxts);
The qib_stats is global to the module, not per HCA, so the code is broken
for multiple HCAs.
This patch adds a qib_devdata field, freectxts, that reflects the free
contexts for this HCA.
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com>
Reviewed-by: Ram Vepa <ram.vepa@qlogic.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
diff --git a/drivers/infiniband/hw/qib/qib_file_ops.c b/drivers/infiniband/hw/qib/qib_file_ops.c
index 2625303..7763366 100644
--- a/drivers/infiniband/hw/qib/qib_file_ops.c
+++ b/drivers/infiniband/hw/qib/qib_file_ops.c
@@ -1284,6 +1284,7 @@
strlcpy(rcd->comm, current->comm, sizeof(rcd->comm));
ctxt_fp(fp) = rcd;
qib_stats.sps_ctxts++;
+ dd->freectxts++;
ret = 0;
goto bail;
@@ -1792,6 +1793,7 @@
if (dd->pageshadow)
unlock_expected_tids(rcd);
qib_stats.sps_ctxts--;
+ dd->freectxts--;
}
mutex_unlock(&qib_mutex);