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Subject[PATCH v3 1/2] usb: dwc2: gadget: sparse warning of context imbalance
Date
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.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
---
drivers/usb/dwc2/gadget.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 7b5856f..7f25527 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;
}
--
1.8.1.2


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