On Fri, Dec 01, 2023 at 02:29:22PM +0100, Johan Hovold wrote: > On Fri, Dec 01, 2023 at 01:08:45PM +0100, Marcus Folkesson wrote: > > Use the guard(mutex) macro for handle mutex lock/unlocks. > > > > Signed-off-by: Marcus Folkesson <marcus.folkesson@xxxxxxxxx> > > A couple of drive-by comments below. > > > --- > > drivers/input/joystick/pxrc.c | 27 +++++++++++---------------- > > 1 file changed, 11 insertions(+), 16 deletions(-) > > > > diff --git a/drivers/input/joystick/pxrc.c b/drivers/input/joystick/pxrc.c > > index ea2bf5951d67..3c3bf7179b46 100644 > > --- a/drivers/input/joystick/pxrc.c > > +++ b/drivers/input/joystick/pxrc.c > > @@ -5,15 +5,17 @@ > > * Copyright (C) 2018 Marcus Folkesson <marcus.folkesson@xxxxxxxxx> > > */ > > > > -#include <linux/kernel.h> > > +#include <linux/cleanup.h> > > #include <linux/errno.h> > > -#include <linux/slab.h> > > +#include <linux/input.h> > > +#include <linux/kernel.h> > > #include <linux/module.h> > > +#include <linux/mutex.h> > > +#include <linux/slab.h> > > #include <linux/uaccess.h> > > + > > #include <linux/usb.h> > > #include <linux/usb/input.h> > > -#include <linux/mutex.h> > > -#include <linux/input.h> > > Looks like an unrelated change. > > > #define PXRC_VENDOR_ID 0x1781 > > #define PXRC_PRODUCT_ID 0x0898 > > @@ -89,25 +91,20 @@ static int pxrc_open(struct input_dev *input) > > dev_err(&pxrc->intf->dev, > > "%s - usb_submit_urb failed, error: %d\n", > > __func__, retval); > > - retval = -EIO; > > - goto out; > > + return -EIO; > > } > > > > pxrc->is_open = true; > > - > > -out: > > - mutex_unlock(&pxrc->pm_mutex); > > - return retval; > > + return 0; > > } > > Eh, this looks obviously broken. Did you not test this before > submitting? I assume lockdep would complain loudly too. > > You're apparently the author of this driver and can test it, but I fear > the coming onslaught of untested guard conversions from the "cleanup" > crew. Not sure I find the result generally more readable either. Yeah, for the code without conditions (like pxrc_close) the utility is questionable, but I guess it is just a matter of getting used to the new facilities... Thanks. -- Dmitry
