[SCSI] fc_transport: fix sysfs deadlock on vport delete

When the vport attribute "delete" is used to delete the vport, sysfs
deadlocks waiting for the write to complete, which is waiting for the
sysfs teardown to complete. Moved this effort to a work_q element.

Took the opportunity to make some other cosmetic changes:
 - removed tabs in Doc file - replaced with expanded spaces
 - minor copyright text and author text updates
 - removed a bunch of trailing whitespace

Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 7 insertions, 6 deletions

diff --git a/include/scsi/scsi_transport_fc.h b/include/scsi/scsi_transport_fc.h
index 81ea7b4bf81e..a0d80bcaa93d 100644
--- a/include/scsi/scsi_transport_fc.h
+++ b/include/scsi/scsi_transport_fc.h
@@ -1,4 +1,4 @@
-/* 
+/*
  *  FiberChannel transport specific attributes exported to sysfs.
  *
  *  Copyright (c) 2003 Silicon Graphics, Inc.  All rights reserved.
@@ -104,7 +104,7 @@ enum fc_vport_state {
 
 
 
-/* 
+/*
  * FC Classes of Service
  * Note: values are not enumerated, as they can be "or'd" together
  * for reporting (e.g. report supported_classes). If you alter this list,
@@ -117,7 +117,7 @@ enum fc_vport_state {
 #define FC_COS_CLASS4                   0x10
 #define FC_COS_CLASS6                   0x40
 
-/* 
+/*
  * FC Port Speeds
  * Note: values are not enumerated, as they can be "or'd" together
  * for reporting (e.g. report supported_speeds). If you alter this list,
@@ -223,6 +223,7 @@ struct fc_vport {
         u8 flags;
         struct list_head peers;
         struct device dev;
+        struct work_struct vport_delete_work;
 } __attribute__((aligned(sizeof(unsigned long))));
 
 /* bit field values for struct fc_vport "flags" field: */
@@ -397,7 +398,7 @@ struct fc_host_statistics {
         u64 prim_seq_protocol_err_count;
         u64 invalid_tx_word_count;
         u64 invalid_crc_count;
-        
+
         /* fc4 statistics  (only FCP supported currently) */
         u64 fcp_input_requests;
         u64 fcp_output_requests;
@@ -592,11 +593,11 @@ struct fc_function_template {
         u32                             dd_fcrport_size;
         u32                             dd_fcvport_size;
 
-        /* 
+        /*
          * The driver sets these to tell the transport class it
          * wants the attributes displayed in sysfs.  If the show_ flag
          * is not set, the attribute will be private to the transport
-         * class 
+         * class
          */
 
         /* remote port fixed attributes */