USB: usblcd: drop redundant disconnect mutex

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Drop the redundant disconnect mutex which was introduced after the
open-disconnect race had been addressed generally in USB core by commit
d4ead16f50 ("USB: prevent char device open/deregister race").

Specifically, the rw-semaphore in core guarantees that all calls to
open() will have completed and that no new calls to open() will occur
after usb_deregister_dev() returns. Hence there is no need use the
driver data as an inverted disconnected flag.

Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20190926091228.24634-8-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Johan Hovold 2019-09-26 11:12:26 +02:00 • committed by Greg Kroah-Hartman

parent eb7f5a490c

commit 61991d02fd

1 changed files with 1 additions and 17 deletions

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18

drivers/usb/misc/usblcd.c

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