tree 8ac928054932e15da8feaa5a60b7385ab0787958
parent 7e1ee4412ca35b17e21159d85224e37e8f259311
author Hannes Reinecke <hare@suse.de> 1464070318 +0200
committer Martin K. Petersen <martin.petersen@oracle.com> 1468379791 -0400

libfc: Update rport reference counting

Originally libfc would just be initializing the refcount to '1', and
using the disc_mutex to synchronize if and when the final put should be
happening.  This has a race condition as the mutex might be delayed,
causing other threads to access an invalid structure.  This patch
updates the rport reference counting to increase the reference every
time 'rport_lookup' is called, and decreases the reference
correspondingly.  This removes the need to hold 'disc_mutex' when
removing the structure, and avoids the above race condition.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Acked-by: Vasu Dev <vasu.dev@intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>