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fdbd1c5e27
With the change for the LUN data to be part of the scsi_device, the slave_destroy callback will be the final call to the zfcp_erp_unit_shutdown function. The erp tries to acquire a reference to run the action asynchronously and fail, if it cannot get the reference. But calling scsi_device_get from slave_destroy will fail, because the scsi_device is already in the state SDEV_DEL. Introduce a new call into the zfcp erp to solve this: The function zfcp_erp_unit_shutdown_wait will close the LUN and wait for the erp to finish without acquiring an additional reference. The wait allows to omit the reference; the caller waiting for the erp to finish already has a reference that holds the struct in place. Reviewed-by: Swen Schillig <swen@vnet.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de> |
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