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usb: renesas_usbhs: fixup: avoid NULL access on error case pipe detach 

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.gx@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Kuninori Morimoto 2012-10-16 23:31:33 -07:00 committed by Felipe Balbi
parent 000b7f5127
commit 4f053a24ec
1 changed files with 5 additions and 0 deletions
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5
drivers/usb/renesas_usbhs/mod_host.c
View File

@ -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);