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authorReza Arbab <arbab@linux.vnet.ibm.com>2016-10-07 17:00:15 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-07 18:46:28 -0700
commitd66ba15bde22703b3c0cec6782519cb0765a6777 (patch)
treea739a48527e3fd9aeb4f8f0dd160ec5824ce60f8 /drivers/base
parent0247f3f4d78a475cd3181dc9fc162fdef773aaaa (diff)
memory-hotplug: fix store_mem_state() return value
If store_mem_state() is called to online memory which is already online, it will return 1, the value it got from device_online(). This is wrong because store_mem_state() is a device_attribute .store function. Thus a non-negative return value represents input bytes read. Set the return value to -EINVAL in this case. Link: http://lkml.kernel.org/r/1472743777-24266-1-git-send-email-arbab@linux.vnet.ibm.com Signed-off-by: Reza Arbab <arbab@linux.vnet.ibm.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: David Rientjes <rientjes@google.com> Cc: Yaowei Bai <baiyaowei@cmss.chinamobile.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Xishi Qiu <qiuxishi@huawei.com> Cc: David Vrabel <david.vrabel@citrix.com> Cc: Chen Yucong <slaoub@gmail.com> Cc: Andrew Banman <abanman@sgi.com> Cc: Seth Jennings <sjenning@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/memory.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index dc75de9059cd..62c63c0c5c22 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -361,8 +361,11 @@ store_mem_state(struct device *dev,
err:
unlock_device_hotplug();
- if (ret)
+ if (ret < 0)
return ret;
+ if (ret)
+ return -EINVAL;
+
return count;
}