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Commit 54cd640d authored by tang.junhui's avatar tang.junhui Committed by Mike Snitzer
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dm mpath: use hw_handler_params if attached hw_handler is same as requested 



Let the requested m->hw_handler_params be used if the attached hardware
handler is the same handler as requested with m->hw_handler_name.

Signed-off-by: default avatartang.junhui <tang.junhui@zte.com.cn>
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
parent c538f6ec

drivers/md/dm-mpath.c

+9 −5
Original line number Diff line number Diff line
@@ -849,19 +849,23 @@ static struct pgpath *parse_path(struct dm_arg_set *as, struct path_selector *ps 
retain:

		attached_handler_name = scsi_dh_attached_handler_name(q, GFP_KERNEL);

		if (attached_handler_name) {

			/*

			 * Clear any hw_handler_params associated with a

			 * handler that isn't already attached.

			 */

			if (m->hw_handler_name && strcmp(attached_handler_name, m->hw_handler_name)) {

				kfree(m->hw_handler_params);

				m->hw_handler_params = NULL;

			}



			/*

			 * Reset hw_handler_name to match the attached handler

			 * and clear any hw_handler_params associated with the

			 * ignored handler.

			 *

			 * NB. This modifies the table line to show the actual

			 * handler instead of the original table passed in.

			 */

			kfree(m->hw_handler_name);

			m->hw_handler_name = attached_handler_name;



			kfree(m->hw_handler_params);

			m->hw_handler_params = NULL;

		}

	}