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authorMark Gross <mgross@linux.intel.com>2007-09-24 09:28:14 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2007-10-12 14:55:26 -0700
commitf7294055a7a5bf1ea7da16dffb0cb0f7a282c04b (patch)
tree3b296fd7b8c1a73e9c7d0944cb7bb7b56061bdfc /Documentation/cdrom
parent6840d2555afd66290be7a39b400b5e66a840b82d (diff)
USB: usb-skeleton leaking locks on open
This weekend I was hacking around with a trivial USB driver for talking to the boot load firmware of a USB Bit Whacker. It's running the MicroChip Pic18 boot loader firmware and I'm putting together a flash program for writing new FW to the thing. Anyway in my use of the usb-skeleton.c as my starting point I discovered my test program was getting hung up after attempting to write a buffer. The application and driver where hung in a way that required me to reboot to get it to clean up so I could try again. It turned out the code path through skel_open can grap the driver's io_mutex lock and forget to release it. The following patch fixes the problem for me. Signed-off-by: Mark Gross <mgross@linux.intel.com> Cc: Oliver Neukum <oliver@neukum.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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