Hans de Goede 3a2a91a2d5 usb: roles: Call try_module_get() from usb_role_switch_find_by_fwnode() ...

usb_role_switch_find_by_fwnode() returns a reference to the role-switch
which must be put by calling usb_role_switch_put().

usb_role_switch_put() calls module_put(sw->dev.parent->driver->owner),
add a matching try_module_get() to usb_role_switch_find_by_fwnode(),
making it behave the same as the other usb_role_switch functions
which return a reference.

This avoids a WARN_ON being hit at kernel/module.c:1158 due to the
module-refcount going below 0.

Fixes: c6919d5e0c ("usb: roles: Add usb_role_switch_find_by_fwnode()")
Cc: stable <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
Reviewed-by: Heikki Krogerus <[email protected]>
Signed-off-by: Hans de Goede <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

2021-04-09 16:07:03 +02:00

..

class.c

usb: roles: Call try_module_get() from usb_role_switch_find_by_fwnode()

2021-04-09 16:07:03 +02:00

intel-xhci-usb-role-switch.c

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Kconfig

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Makefile

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