[F][PATCH 6/11] pci/hotplug/pnv-php: Remove erroneous warning

[frank.heimes at canonical.com]

From: Frederic Barrat <fbarrat at linux.ibm.com>

BugLink: https://bugs.launchpad.net/bugs/1862121

On powernv, when removing a device through hotplug, the following
warning is logged:

     Invalid refcount <.> on <...>

It may be incorrect, the refcount may be set to a higher value than 1
and be valid. of_detach_node() can drop more than one reference. As it
doesn't seem trivial to assert the correct value, let's remove the
warning.

Reviewed-by: Alastair D'Silva <alastair at d-silva.org>
Reviewed-by: Andrew Donnellan <ajd at linux.ibm.com>
Signed-off-by: Frederic Barrat <fbarrat at linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>
Link: https://lore.kernel.org/r/20191121134918.7155-7-fbarrat@linux.ibm.com
(cherry picked from commit 658ab186dd22060408d94f5c5a6d02d809baba44)
Signed-off-by: Frank Heimes <frank.heimes at canonical.com>
---
 drivers/pci/hotplug/pnv_php.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/pci/hotplug/pnv_php.c b/drivers/pci/hotplug/pnv_php.c
index d7b2b47bc33e..6037983c6e46 100644
--- a/drivers/pci/hotplug/pnv_php.c
+++ b/drivers/pci/hotplug/pnv_php.c
@@ -151,17 +151,11 @@ static void pnv_php_rmv_pdns(struct device_node *dn)
 static void pnv_php_detach_device_nodes(struct device_node *parent)
 {
 	struct device_node *dn;
-	int refcount;
 
 	for_each_child_of_node(parent, dn) {
 		pnv_php_detach_device_nodes(dn);
 
 		of_node_put(dn);
-		refcount = kref_read(&dn->kobj.kref);
-		if (refcount != 1)
-			pr_warn("Invalid refcount %d on <%pOF>\n",
-				refcount, dn);
-
 		of_detach_node(dn);
 	}
 }
-- 
2.25.0