USB: hub: change the locking in hub_activate

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commit 07d316a22e upstream.

The locking in hub_activate() is not adequate to provide full mutual
exclusion with hub_quiesce().  The subroutine locks the hub's
usb_interface, but the callers of hub_quiesce() (such as
hub_pre_reset() and hub_event()) hold the lock to the hub's
usb_device.

This patch changes hub_activate() to make it acquire the same lock as
those other routines.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Alan Stern 2016-08-05 11:51:30 -04:00 • committed by Greg Kroah-Hartman

parent 5221741617

commit 4a6eff809a

1 changed files with 3 additions and 3 deletions

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6

drivers/usb/core/hub.c

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