Re: Hello driver

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Hello,

Greg KH wrote:

down_interruptible(&sem) ;

Why interruptible?

Another remark : if you really need to use down_interruptible() (for some reason), be sure to check the return value of this function. As the name says, when you call this function, you can be interrupted by a signal. So, you should not assume that once down_interruptible() as returned, you own the corresponding semaphore : you may have been interrupted by a signal.


Sincerly,

Thomas
--
Thomas Petazzoni
thomas.petazzoni@xxxxxxxx

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