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Sreekanth Reddy authored
sas_device objects can be referenced concurrently throughout the driver. We need a way to make sure threads can't delete them out from under each other. This patch adds the refcount and refactors the code to use it. Additionally, we cannot iterate over the sas_device_list without holding the lock or we risk corrupting random memory if items are added or deleted as we iterate. This patch refactors _scsih_probe_sas() to use the sas_device_list in a safe way. This patch is ported from the following mpt2sas driver commit d224fe0d ("mpt2sas: Refcount sas_device objects and fix unsafe list usage"). Signed-off-by:
Sreekanth Reddy <Sreekanth.Reddy@avagotech.com> Acked-by:
Christoph Hellwig <hch@lst.de> Reviewed-by:
Hannes Reinecke <hare@suse.de> Signed-off-by:
Martin K. Petersen <martin.petersen@oracle.com>
d1cb5e49