| Message ID | 20240904044244.1042174-11-dmitry.torokhov@gmail.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Convert misc input drivers to use new cleanup facilities | expand |
On 04/09/2024 06:42, Dmitry Torokhov wrote: > Using guard notation makes the code more compact and error handling > more robust by ensuring that locks are released in all code paths > when control leaves critical section. > > Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> > --- > drivers/input/misc/ideapad_slidebar.c | 22 +++++----------------- > 1 file changed, 5 insertions(+), 17 deletions(-) > > diff --git a/drivers/input/misc/ideapad_slidebar.c b/drivers/input/misc/ideapad_slidebar.c > index fa4e7f67d713..592bd159a194 100644 > --- a/drivers/input/misc/ideapad_slidebar.c > +++ b/drivers/input/misc/ideapad_slidebar.c > @@ -95,41 +95,29 @@ static struct platform_device *slidebar_platform_dev; > > static u8 slidebar_pos_get(void) > { > - u8 res; > - unsigned long flags; > + guard(spinlock_irqsave)(&io_lock); > > - spin_lock_irqsave(&io_lock, flags); > outb(0xf4, 0xff29); > outb(0xbf, 0xff2a); > - res = inb(0xff2b); > - spin_unlock_irqrestore(&io_lock, flags); > - > - return res; > + return inb(0xff2b); > } > > static u8 slidebar_mode_get(void) > { > - u8 res; > - unsigned long flags; > + guard(spinlock_irqsave)(&io_lock); > > - spin_lock_irqsave(&io_lock, flags); > outb(0xf7, 0xff29); > outb(0x8b, 0xff2a); > - res = inb(0xff2b); > - spin_unlock_irqrestore(&io_lock, flags); > - > - return res; > + return inb(0xff2b); > } > > static void slidebar_mode_set(u8 mode) > { > - unsigned long flags; > + guard(spinlock_irqsave)(&io_lock); > > - spin_lock_irqsave(&io_lock, flags); > outb(0xf7, 0xff29); > outb(0x8b, 0xff2a); > outb(mode, 0xff2b); > - spin_unlock_irqrestore(&io_lock, flags); > } > > static bool slidebar_i8042_filter(unsigned char data, unsigned char str, Reviewed-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
diff --git a/drivers/input/misc/ideapad_slidebar.c b/drivers/input/misc/ideapad_slidebar.c index fa4e7f67d713..592bd159a194 100644 --- a/drivers/input/misc/ideapad_slidebar.c +++ b/drivers/input/misc/ideapad_slidebar.c @@ -95,41 +95,29 @@ static struct platform_device *slidebar_platform_dev; static u8 slidebar_pos_get(void) { - u8 res; - unsigned long flags; + guard(spinlock_irqsave)(&io_lock); - spin_lock_irqsave(&io_lock, flags); outb(0xf4, 0xff29); outb(0xbf, 0xff2a); - res = inb(0xff2b); - spin_unlock_irqrestore(&io_lock, flags); - - return res; + return inb(0xff2b); } static u8 slidebar_mode_get(void) { - u8 res; - unsigned long flags; + guard(spinlock_irqsave)(&io_lock); - spin_lock_irqsave(&io_lock, flags); outb(0xf7, 0xff29); outb(0x8b, 0xff2a); - res = inb(0xff2b); - spin_unlock_irqrestore(&io_lock, flags); - - return res; + return inb(0xff2b); } static void slidebar_mode_set(u8 mode) { - unsigned long flags; + guard(spinlock_irqsave)(&io_lock); - spin_lock_irqsave(&io_lock, flags); outb(0xf7, 0xff29); outb(0x8b, 0xff2a); outb(mode, 0xff2b); - spin_unlock_irqrestore(&io_lock, flags); } static bool slidebar_i8042_filter(unsigned char data, unsigned char str,
Using guard notation makes the code more compact and error handling more robust by ensuring that locks are released in all code paths when control leaves critical section. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> --- drivers/input/misc/ideapad_slidebar.c | 22 +++++----------------- 1 file changed, 5 insertions(+), 17 deletions(-)