Commit a124820de5fd ("usb: isp1760: fix possible deadlock in
isp1760_udc_irq") replaced spin_{un,}lock with spin_{un,}lock_irq{save,restore}.
However it missed an error path resulting in the smatch warning as below:
drivers/usb/isp1760/isp1760-udc.c:1230 isp1760_udc_start() warn: inconsistent returns 'irqsave:flags'.
Locked on: line 1207
Unlocked on: line 1199
This patch fixes the spin unlock in the error path in isp1760_udc_start
thereby removing the smatch warning mentioned above.
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Cc: Felipe Balbi <balbi@xxxxxx>
Signed-off-by: Sudeep Holla <sudeep.holla@xxxxxxx>
---
drivers/usb/isp1760/isp1760-udc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Hi Laurent, Felipe,
I am extremely sorry for missing this in my original patch.
Thanks to Dan Carpenter for reporting this.
Regards,
Sudeep
diff --git a/drivers/usb/isp1760/isp1760-udc.c b/drivers/usb/isp1760/isp1760-udc.c
index fbfbd59aae64..b7094eee0bdd 100644
--- a/drivers/usb/isp1760/isp1760-udc.c
+++ b/drivers/usb/isp1760/isp1760-udc.c
@@ -1203,7 +1203,7 @@ static int isp1760_udc_start(struct usb_gadget *gadget,
if (udc->driver) {
dev_err(udc->isp->dev, "UDC already has a gadget driver\n");
- spin_unlock(&udc->lock);
+ spin_unlock_irqrestore(&udc->lock, flags);
return -EBUSY;
}
--
1.9.1
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