usb: chipidea: core: fix possible concurrent when switch role

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commit 451b15ed13 upstream.

The user may call role_store() when driver is handling
ci_handle_id_switch() which is triggerred by otg event or power lost
event. Unfortunately, the controller may go into chaos in this case.
Fix this by protecting it with mutex lock.

Fixes: a932a8041f ("usb: chipidea: core: add sysfs group")
cc: <stable@vger.kernel.org>
Acked-by: Peter Chen <peter.chen@kernel.org>
Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Link: https://lore.kernel.org/r/20230317061516.2451728-2-xu.yang_2@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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This commit is contained in:

Xu Yang 2023-03-17 14:15:16 +08:00 • committed by Greg Kroah-Hartman

parent 4e34981438

commit 4c1a06454f

3 changed files with 13 additions and 2 deletions

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2

drivers/usb/chipidea/ci.h

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8

drivers/usb/chipidea/core.c

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5

drivers/usb/chipidea/otg.c

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