The patch below does not apply to the 3.17-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From b585a48b8a9486f26a68886278f2c8f981676dd4 Mon Sep 17 00:00:00 2001
From: Sudip Mukherjee <sudipm.mukherjee@xxxxxxxxx>
Date: Fri, 17 Oct 2014 10:14:02 +0530
Subject: [PATCH] usb: dwc2: gadget: sparse warning of context imbalance
sparse was giving the following warning:
warning: context imbalance in 's3c_hsotg_ep_enable'
- different lock contexts for basic block
we were returning ENOMEM while still holding the spinlock.
The sparse warning was fixed by releasing the spinlock before return.
Cc: <stable@xxxxxxxxxxxxxxx> # v3.17
Acked-by: Paul Zimmerman <paulz@xxxxxxxxxxxx>
Signed-off-by: Sudip Mukherjee <sudip@xxxxxxxxxxxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 7b5856fadd93..7f25527b10a7 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -2561,8 +2561,10 @@ static int s3c_hsotg_ep_enable(struct usb_ep *ep,
hs_ep->fifo_size = val;
break;
}
- if (i == 8)
- return -ENOMEM;
+ if (i == 8) {
+ ret = -ENOMEM;
+ goto error;
+ }
}
/* for non control endpoints, set PID to D0 */
@@ -2579,6 +2581,7 @@ static int s3c_hsotg_ep_enable(struct usb_ep *ep,
/* enable the endpoint interrupt */
s3c_hsotg_ctrl_epint(hsotg, index, dir_in, 1);
+error:
spin_unlock_irqrestore(&hsotg->lock, flags);
return ret;
}
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