RDMA/nes: Free kmap() resources
We fail when creating many qps as kmap() fails for sq_vbase.
Fix this by doing kunmap() as soon as we are done with sq_vbase.
We do kunmap() in one of the locations below:
(1) nes_destroy_qp()
(2) nes_accept()
(3) nes_connect_event
We keep a flag to avoid multiple calls to kunmap().
Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/nes/nes_cm.c b/drivers/infiniband/hw/nes/nes_cm.c
index a258168..b139806 100644
--- a/drivers/infiniband/hw/nes/nes_cm.c
+++ b/drivers/infiniband/hw/nes/nes_cm.c
@@ -52,6 +52,7 @@
#include <linux/random.h>
#include <linux/list.h>
#include <linux/threads.h>
+#include <linux/highmem.h>
#include <net/arp.h>
#include <net/neighbour.h>
#include <net/route.h>
@@ -2836,6 +2837,10 @@
cpu_to_le32(conn_param->private_data_len +
sizeof(struct ietf_mpa_frame));
wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = ibmr->lkey;
+ if (nesqp->sq_kmapped) {
+ nesqp->sq_kmapped = 0;
+ kunmap(nesqp->page);
+ }
nesqp->nesqp_context->ird_ord_sizes |=
cpu_to_le32(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |
@@ -3304,6 +3309,11 @@
wqe->wqe_words[NES_IWARP_SQ_WQE_LENGTH0_IDX] = 0;
wqe->wqe_words[NES_IWARP_SQ_WQE_STAG0_IDX] = 0;
+ if (nesqp->sq_kmapped) {
+ nesqp->sq_kmapped = 0;
+ kunmap(nesqp->page);
+ }
+
/* use the reserved spot on the WQ for the extra first WQE */
nesqp->nesqp_context->ird_ord_sizes &=
cpu_to_le32(~(NES_QPCONTEXT_ORDIRD_LSMM_PRESENT |