cciss: Fix excessive gendisk freeing bug on driver unload.
Fix bug that free_hba was calling put_disk for all gendisk[] pointers -- all 1024 of them -- regardless of whether the were used or not (NULL). This bug could cause rmmod to oops if logical drives had been deleted during the driver's lifetime. Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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