USB: skel_read really sucks royally
The read code path of the skeleton driver really sucks - skel_read works only for devices which always send data - the timeout comes out of thin air - it blocks signals for the duration of the timeout - it disallows nonblocking IO by design This patch fixes it by using a real urb, a completion and interruptible waits. Signed-off-by: NOliver Neukum <oliver@neukum.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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