[PATCH 4.8 62/67] IB/hfi1: Remove incorrect IS_ERR check

[Greg Kroah-Hartman]

4.8-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dennis Dalessandro <dennis.dalessandro@xxxxxxxxx>

commit 2b16056f845207967a32497f41cf92b57849f934 upstream.

Remove IS_ERR check from caching code as the function being called does
not actually return error pointers.

Fixes: f19bd643dbde: "IB/hfi1: Prevent NULL pointer deferences in caching code"
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Reviewed-by: Dean Luick <dean.luick@xxxxxxxxx>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@xxxxxxxxx>
Signed-off-by: Doug Ledford <dledford@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/infiniband/hw/hfi1/user_sdma.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/infiniband/hw/hfi1/user_sdma.c
+++ b/drivers/infiniband/hw/hfi1/user_sdma.c
@@ -1152,7 +1152,7 @@ static int pin_vector_pages(struct user_
 	rb_node = hfi1_mmu_rb_extract(pq->handler,
 				      (unsigned long)iovec->iov.iov_base,
 				      iovec->iov.iov_len);
-	if (rb_node && !IS_ERR(rb_node))
+	if (rb_node)
 		node = container_of(rb_node, struct sdma_mmu_node, rb);
 	else
 		rb_node = NULL;