LinuxQuestions.org - Why does Ctrl+C causes module release ?

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Why does Ctrl+C causes module release ?

Hello,

I'm using vanilla 2.6.27.35 on a Core2Duo CPU.

The CPU access customized hardware via PCI using a very simple device driver and a user level driver I wrote.

The application waits for a PCI interrupt received in the device driver and then writes data to the hardware. This process goes forever.

When I press Ctrl+C I see that the release part of the device driver is called.

What is the reason for this ? I expect only the application to stop.

Thanks.

Quote:

Originally Posted by zvivered (Post 4262012)

When I press Ctrl+C I see that the release part of the device driver is called.
What is the reason for this ? I expect only the application to stop.

It could be that the operating system is cleaning up after you and closing the file handle to the device driver:

Quote:

Originally Posted by "Essential Linux Device Drivers", Sreekrishnan Venkateswaran, p. 127

The kernel calls the release() method when an application closes an open device.