From: Mustafa Ismail <mustafa.ismail@intel.com>
Date: Tue, 12 Jul 2016 16:48:46 +0000 (-0500)
Subject: i40iw: Add NULL check for puda buffer
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=da5c138185006a6e92ea804046543e2ed1401229;p=linux-beck.git

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 e9c6e82af9c7..c62d354f7810 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_puda.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_puda.c
@@ -1025,6 +1025,8 @@ static void  i40iw_ieq_compl_pfpdu(struct i40iw_puda_rsrc *ieq,
 	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 @@ static void  i40iw_ieq_compl_pfpdu(struct i40iw_puda_rsrc *ieq,
 		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);