usb: roles: don't get/set_role() when usb_role_switch is unregistered

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commit b787a3e781 upstream.

There is a possibility that usb_role_switch device is unregistered before
the user put usb_role_switch. In this case, the user may still want to
get/set_role() since the user can't sense the changes of usb_role_switch.

This will add a flag to show if usb_role_switch is already registered and
avoid unwanted behaviors.

Fixes: fde0aa6c17 ("usb: common: Small class for USB role switches")
cc: stable@vger.kernel.org
Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20240129093739.2371530-2-xu.yang_2@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Xu Yang 2024-01-29 17:37:39 +08:00 • committed by Greg Kroah-Hartman

parent 0158216805

commit 2f414a56b3

1 changed files with 10 additions and 2 deletions

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drivers/usb/roles/class.c

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