On Tue, Nov 14, 2017 at 11:19:16AM +0000, Russell King - ARM Linux wrote:

On Tue, Nov 14, 2017 at 12:10:46PM +0100, gregkh at linuxfoundation.org wrote:

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On Tue, Nov 14, 2017 at 10:34:49AM +0000, Oleksandr Shamray wrote:

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Greg, what you can suggest about it. May be better to add again single-open()-per-device lock with right locking way like:

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if (mutex_lock_interruptible(&jtag->open_lock)) {

You would stall an open?  Why not just return saying you can't do that?

Greg, I think you need to look at the code again.

Heh, sorry, I probably got it wrong.  I'll be glad to review it in a
real patch when needed, but not in the middle of the merge window :)

thanks,

greg k-h