s390/ap: fix error handling in __verify_queue_reservations()
The AP bus's __verify_queue_reservations function increments the ref count for the device driver passed in as a parameter, but fails to decrement it before returning control to the caller. This will prevents any subsequent removal of the module. Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com> Reported-by: Tony Krowiak <akrowiak@linux.ibm.com> Reviewed-by: Harald Freudenberger <freude@linux.ibm.com> Fixes: 4f8206b88286 ("s390/ap: driver callback to indicate resource in use") Link: https://lore.kernel.org/r/20220706222619.602094-1-akrowiak@linux.ibm.com Cc: stable@vger.kernel.org [agordeev@linux.ibm.com fixed description, added Fixes and Link] Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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@ -1435,7 +1435,7 @@ static int __verify_queue_reservations(struct device_driver *drv, void *data)
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if (ap_drv->in_use) {
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rc = ap_drv->in_use(ap_perms.apm, newaqm);
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if (rc)
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return -EBUSY;
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rc = -EBUSY;
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}
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/* release the driver's module */
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