From 513e48f90a9d092ffcf8301b6ed10a8d8a5ebe77 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Tue, 5 Jun 2012 11:12:18 -0700 Subject: [PATCH] staging: comedi: ni_labpc: unlock spinlock on command error When starting the acquisition the labpc_ai_cmd function was exiting without unlocking the spinlock. This results in a sparse warning: warning: context imbalance in 'labpc_ai_cmd' - different lock contexts for basic block Add the missing spin_unlock_irqrestore calls. Signed-off-by: H Hartley Sweeten Cc: Ian Abbott Cc: Mori Hess Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/ni_labpc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/staging/comedi/drivers/ni_labpc.c b/drivers/staging/comedi/drivers/ni_labpc.c index 53349777246b..1d739b26e678 100644 --- a/drivers/staging/comedi/drivers/ni_labpc.c +++ b/drivers/staging/comedi/drivers/ni_labpc.c @@ -1386,6 +1386,7 @@ static int labpc_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) break; default: comedi_error(dev, "bug with start_src"); + spin_unlock_irqrestore(&dev->spinlock, flags); return -1; break; } @@ -1398,6 +1399,7 @@ static int labpc_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) break; default: comedi_error(dev, "bug with stop_src"); + spin_unlock_irqrestore(&dev->spinlock, flags); return -1; } devpriv->write_byte(devpriv->command2_bits, dev->iobase + COMMAND2_REG); -- 2.30.2