i40iw: Add NULL check for puda buffer
i40iw_puda_get_listbuf may return NULL if the list is empty.
Add NULL check prior to accessing the pointer.
Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/drivers/infiniband/hw/i40iw/i40iw_puda.c b/drivers/infiniband/hw/i40iw/i40iw_puda.c
index e9c6e82..c62d354 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_puda.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_puda.c
@@ -1025,6 +1025,8 @@
u16 txoffset, bufoffset;
buf = i40iw_puda_get_listbuf(pbufl);
+ if (!buf)
+ return;
nextseqnum = buf->seqnum + fpdu_len;
txbuf->totallen = buf->hdrlen + fpdu_len;
txbuf->data = (u8 *)txbuf->mem.va + buf->hdrlen;
@@ -1048,6 +1050,8 @@
fpdu_len -= buf->datalen;
i40iw_puda_ret_bufpool(ieq, buf);
buf = i40iw_puda_get_listbuf(pbufl);
+ if (!buf)
+ return;
bufoffset = (u16)(buf->data - (u8 *)buf->mem.va);
} while (1);