If renesas_usbhs or DMAEngine interrupt didn't happen by a certain cause,
urb->ep will be NULL by usb time out.
Then, host mode will access to it and crash kernel.
This patch fixes it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto...@renesas.com>
---
drivers/usb/renesas_usbhs/mod_host.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/usb/renesas_usbhs/mod_host.c
b/drivers/usb/renesas_usbhs/mod_host.c
index e856b44..ff38a30 100644
--- a/drivers/usb/renesas_usbhs/mod_host.c
+++ b/drivers/usb/renesas_usbhs/mod_host.c
@@ -334,6 +334,11 @@ static void usbhsh_pipe_detach(struct usbhsh_hpriv *hpriv,
struct device *dev = usbhs_priv_to_dev(priv);
unsigned long flags;
+ if (unlikely(!uep)) {
+ dev_err(dev, "no uep\n");
+ return;
+ }
+
/******************** spin lock ********************/
usbhs_lock(priv, flags);
--
1.7.9.5
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