Messages in this thread | | | Date | Fri, 7 Jan 2011 11:50:00 -0800 | From | Dmitry Torokhov <> | Subject | Re: [PATCH] input: joystick: Adding Austria Microsystem AS5011 joystick driver (third version) |
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On Fri, Jan 07, 2011 at 08:42:37PM +0100, Fabien Marteau wrote: > On 04/01/2011 12:01, Trilok Soni wrote: > > Hi Fabien, > > > > On 1/4/2011 3:17 PM, Fabien Marteau wrote: > >> + > >> +static irqreturn_t as5011_int_interrupt(int irq, void *dev_id) > >> +{ > >> + struct as5011_platform_data *plat_dat = dev_id; > >> + > >> + mutex_lock(&plat_dat->update_lock); > >> + as5011_update_axes(plat_dat); > >> + mutex_unlock(&plat_dat->update_lock); > > > > Please explain this lock. Sorry if I have missed out your explanation in the earlier threads. > > If a second interruption occurs the first update must be finished before update again.
The ISR handler will not be called simultaneously on several CPUs. What else can it race with?
-- Dmitry
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