[SCSI] zfcp: fix: problem in send_els_handler when D_ID assignment changes

From: Maxim Shchetynin <maxim@de.ibm.com>

Fixes a bug in zfcp_send_els_handler.  If D_ID assignments for ports
are changing between initiation of one ELS request and its completion
the wrong port might be accessed in the completion for that ELS
request. Thus a pointer to the port has to be passed for ELS requests
to identify the port structure if required.

Signed-off-by: Andreas Herrmann <aherrman@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h
index 08369b9dad68..37982058e4d9 100644
--- a/drivers/s390/scsi/zfcp_def.h
+++ b/drivers/s390/scsi/zfcp_def.h
@@ -751,6 +751,7 @@ typedef void (*zfcp_send_els_handler_t)(unsigned long);
 /**
  * struct zfcp_send_els - used to pass parameters to function zfcp_fsf_send_els
  * @adapter: adapter where request is sent from
+ * @port: port where ELS is destinated (port reference count has to be increased)
  * @d_id: destiniation id of port where request is sent to
  * @req: scatter-gather list for request
  * @resp: scatter-gather list for response
@@ -765,6 +766,7 @@ typedef void (*zfcp_send_els_handler_t)(unsigned long);
  */
 struct zfcp_send_els {
         struct zfcp_adapter *adapter;
+        struct zfcp_port *port;
         fc_id_t d_id;
         struct scatterlist *req;
         struct scatterlist *resp;