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Message-Id: <20200418140910.8280-72-sashal@kernel.org>
Date: Sat, 18 Apr 2020 10:09:07 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Frederic Barrat <fbarrat@...ux.ibm.com>,
Alastair D'Silva <alastair@...ilva.org>,
Andrew Donnellan <ajd@...ux.ibm.com>,
Michael Ellerman <mpe@...erman.id.au>,
Sasha Levin <sashal@...nel.org>, linuxppc-dev@...ts.ozlabs.org,
linux-pci@...r.kernel.org
Subject: [PATCH AUTOSEL 5.5 72/75] pci/hotplug/pnv-php: Remove erroneous warning
From: Frederic Barrat <fbarrat@...ux.ibm.com>
[ Upstream commit 658ab186dd22060408d94f5c5a6d02d809baba44 ]
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@...ilva.org>
Reviewed-by: Andrew Donnellan <ajd@...ux.ibm.com>
Signed-off-by: Frederic Barrat <fbarrat@...ux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@...erman.id.au>
Link: https://lore.kernel.org/r/20191121134918.7155-7-fbarrat@linux.ibm.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
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 d7b2b47bc33eb..6037983c6e46b 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);
}
}
--
2.20.1
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