Re: Failure to access cifs mount of samba share after resume from sleep with 5.17-rc5

[Paulo Alcantara <pc@cjr.nz>]

Hi Satadru,

Thanks for providing all requested files off-list.  With that, I ended
up with below changes that should fix your issue.  Please let us if it
works.

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 12c872800326..325423180fd2 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -1086,7 +1086,7 @@ struct file_system_type cifs_fs_type = {
 };
 MODULE_ALIAS_FS("cifs");
 
-static struct file_system_type smb3_fs_type = {
+struct file_system_type smb3_fs_type = {
 	.owner = THIS_MODULE,
 	.name = "smb3",
 	.init_fs_context = smb3_init_fs_context,
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index dd7e070ca243..b17be47a8e59 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -38,7 +38,7 @@ static inline unsigned long cifs_get_time(struct dentry *dentry)
 	return (unsigned long) dentry->d_fsdata;
 }
 
-extern struct file_system_type cifs_fs_type;
+extern struct file_system_type cifs_fs_type, smb3_fs_type;
 extern const struct address_space_operations cifs_addr_ops;
 extern const struct address_space_operations cifs_addr_ops_smallbuf;
 
diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index 35962a1a23b9..eeb2a2957a68 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -1211,8 +1211,12 @@ static struct super_block *__cifs_get_super(void (*f)(struct super_block *, void
 		.data = data,
 		.sb = NULL,
 	};
+	struct file_system_type **fs_type = (struct file_system_type *[]) {
+		&cifs_fs_type, &smb3_fs_type, NULL,
+	};
 
-	iterate_supers_type(&cifs_fs_type, f, &sd);
+	for (; *fs_type; fs_type++)
+		iterate_supers_type(*fs_type, f, &sd);
 
 	if (!sd.sb)
 		return ERR_PTR(-EINVAL);