namespace-action: Drop zero namespace checks.

BZ: 
Brew: 

commit 80e0d88c3098bd419e26146a8cb3b693fdd06417
Author: Santosh Sivaraj <santosh@fossix.org>
Date:   Wed Jan 6 14:17:42 2021 +0100

    namespace-action: Drop zero namespace checks.
    
    With seed namespaces catched early on these checks for sizes in enable
    and destroy namespace code path are not needed.
    
    Reverts commit b9cb03f6d5a8 ("ndctl/namespace: Fix enable-namespace
    error for seed namespaces")
    
    Reverts commit e01045e58ad5 ("ndctl/namespace: Fix destroy-namespace
    accounting relative to seed devices")
    
    Link: https://patchwork.kernel.org/patch/11739975/
    Link: https://lore.kernel.org/r/eb4bc7885708fa13e3d37286bc4a4219b1e4e5b6.1609938610.git.msuchanek@suse.de
    Fixes: b9cb03f6d5a8 ("ndctl/namespace: Fix enable-namespace error for seed namespaces")
    Fixes: e01045e58ad5 ("ndctl/namespace: Fix destroy-namespace accounting relative to seed devices")
    Signed-off-by: Santosh Sivaraj <santosh@fossix.org>
    [rebased on top of the previous patches]
    Signed-off-by: Michal Suchanek <msuchanek@suse.de>
    Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>

diff --git a/ndctl/lib/libndctl.c b/ndctl/lib/libndctl.c
index 536e142..87f60b9 100644
--- a/ndctl/lib/libndctl.c
+++ b/ndctl/lib/libndctl.c
@@ -4531,16 +4531,11 @@ NDCTL_EXPORT int ndctl_namespace_enable(struct ndctl_namespace *ndns)
 	const char *devname = ndctl_namespace_get_devname(ndns);
 	struct ndctl_ctx *ctx = ndctl_namespace_get_ctx(ndns);
 	struct ndctl_region *region = ndns->region;
-	unsigned long long size = ndctl_namespace_get_size(ndns);
 	int rc;
 
 	if (ndctl_namespace_is_enabled(ndns))
 		return 0;
 
-	/* Don't try to enable idle namespace (no capacity allocated) */
-	if (size == 0)
-		return -ENXIO;
-
 	rc = ndctl_bind(ctx, ndns->module, devname);
 
 	/*
diff --git a/ndctl/namespace.c b/ndctl/namespace.c
index cd822b3..c67c086 100644
--- a/ndctl/namespace.c
+++ b/ndctl/namespace.c
@@ -1164,15 +1164,12 @@ static int namespace_destroy(struct ndctl_region *region,
 		struct ndctl_namespace *ndns)
 {
 	const char *devname = ndctl_namespace_get_devname(ndns);
-	unsigned long long size;
 	int rc;
 
 	rc = namespace_prep_reconfig(region, ndns);
 	if (rc < 0)
 		return rc;
 
-	size = ndctl_namespace_get_size(ndns);
-
 	/* Labeled namespace, destroy label / allocation */
 	if (rc == 2) {
 		rc = ndctl_namespace_delete(ndns);
@@ -1180,13 +1177,6 @@ static int namespace_destroy(struct ndctl_region *region,
 			debug("%s: failed to reclaim\n", devname);
 	}
 
-	/*
-	 * Don't report a destroyed namespace when no capacity was
-	 * allocated.
-	 */
-	if (size == 0 && rc == 0)
-		rc = 1;
-
 	return rc;
 }