musb_start_urb() doesn't check the 3rd pass-in parameter if it is NULL.
But in musb_bulk_nak_timeout() the parameter passed to musb_start_urb()
is returned from first_qh(), which could be NULL.
So wrap the musb_start_urb() call here with a if condition check to
avoid the potential NULL pointer dereference.
Signed-off-by: Bin Liu <b-...@ti.com>
---
v2: no changes.
drivers/usb/musb/musb_host.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index e50438ae241e..218aadef5bbf 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -990,7 +990,9 @@ static void musb_bulk_nak_timeout(struct musb *musb, struct
musb_hw_ep *ep,
/* set tx_reinit and schedule the next qh */
ep->tx_reinit = 1;
}
- musb_start_urb(musb, is_in, next_qh);
+
+ if (next_qh)
+ musb_start_urb(musb, is_in, next_qh);
}
}
--
1.9.1
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