cifs: eliminate cifsInodeInfo->write_behind_rc (try #6)

write_behind_rc is redundant and just adds complexity to the code. What
we really want to do instead is to use mapping_set_error to reset the
flags on the mapping when we find a writeback error and can't report it
to userspace yet.

For cifs_flush and cifs_fsync, we shouldn't reset the flags since errors
returned there do get reported to userspace.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Suresh Jayaraman <sjayaraman@suse.de>
Reviewed-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 5 insertions, 10 deletions

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 94979309698a..39869c3c3efb 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1682,8 +1682,7 @@ cifs_invalidate_mapping(struct inode *inode)
         /* write back any cached data */
         if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
                 rc = filemap_write_and_wait(inode->i_mapping);
-                if (rc)
-                        cifs_i->write_behind_rc = rc;
+                mapping_set_error(inode->i_mapping, rc);
         }
         invalidate_remote_inode(inode);
         cifs_fscache_reset_inode_cookie(inode);
@@ -1943,10 +1942,8 @@ cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
          * the flush returns error?
          */
         rc = filemap_write_and_wait(inode->i_mapping);
-        if (rc != 0) {
-                cifsInode->write_behind_rc = rc;
-                rc = 0;
-        }
+        mapping_set_error(inode->i_mapping, rc);
+        rc = 0;
 
         if (attrs->ia_valid & ATTR_SIZE) {
                 rc = cifs_set_file_size(inode, attrs, xid, full_path);
@@ -2087,10 +2084,8 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
          * the flush returns error?
          */
         rc = filemap_write_and_wait(inode->i_mapping);
-        if (rc != 0) {
-                cifsInode->write_behind_rc = rc;
-                rc = 0;
-        }
+        mapping_set_error(inode->i_mapping, rc);
+        rc = 0;
 
         if (attrs->ia_valid & ATTR_SIZE) {
                 rc = cifs_set_file_size(inode, attrs, xid, full_path);