From: Keith Busch <keith.busch@intel.com>
Date: Thu, 26 Apr 2018 20:24:29 +0000 (-0600)
Subject: nvme/multipath: Disable runtime writable enabling parameter
X-Git-Tag: v4.16.17~112
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=44ac74871de3ad04f73149f463a4be484cdee84a;p=thirdparty%2Fkernel%2Fstable.git

nvme/multipath: Disable runtime writable enabling parameter

[ Upstream commit 5cadde8019a6a80550fdde92d5a3327565974eab ]

We can't allow the user to change multipath settings at runtime, as this
will create naming conflicts due to the different naming schemes used
for each mode.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index 060f69e034276..1b81809396a4a 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -15,7 +15,7 @@
 #include "nvme.h"
 
 static bool multipath = true;
-module_param(multipath, bool, 0644);
+module_param(multipath, bool, 0444);
 MODULE_PARM_DESC(multipath,
 	"turn on native support for multiple controllers per subsystem");