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authorLeon Romanovsky <leonro@mellanox.com>2019-06-16 15:05:20 +0300
committerDoug Ledford <dledford@redhat.com>2019-06-20 15:17:59 -0400
commit836a0fbb3e76f704ad65ddfb57f00725245e509b (patch)
tree30d961b48c7029a952e6eeb5077d76ce0e4a5221 /drivers/infiniband/hw/cxgb3/iwch_provider.c
parentRDMA/hns: reset function when removing module (diff)
downloadlinux-dev-836a0fbb3e76f704ad65ddfb57f00725245e509b.tar.xz
linux-dev-836a0fbb3e76f704ad65ddfb57f00725245e509b.zip
RDMA: Check umem pointer validity prior to release
Update ib_umem_release() to behave similarly to kfree() and allow submitting NULL pointer as safe input to this function. Fixes: a52c8e2469c3 ("RDMA: Clean destroy CQ in drivers do not return errors") Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to '')
-rw-r--r--drivers/infiniband/hw/cxgb3/iwch_provider.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/infiniband/hw/cxgb3/iwch_provider.c b/drivers/infiniband/hw/cxgb3/iwch_provider.c
index 810fa96af2e9..e775c1a1a450 100644
--- a/drivers/infiniband/hw/cxgb3/iwch_provider.c
+++ b/drivers/infiniband/hw/cxgb3/iwch_provider.c
@@ -346,8 +346,7 @@ static int iwch_dereg_mr(struct ib_mr *ib_mr, struct ib_udata *udata)
xa_erase_irq(&rhp->mrs, mmid);
if (mhp->kva)
kfree((void *) (unsigned long) mhp->kva);
- if (mhp->umem)
- ib_umem_release(mhp->umem);
+ ib_umem_release(mhp->umem);
pr_debug("%s mmid 0x%x ptr %p\n", __func__, mmid, mhp);
kfree(mhp);
return 0;