linux-kernel - [PATCH v2 4/6] powerpc/powernv: hold device_hotplug_lock when calling device

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20180925091457.28651-5-david@redhat.com>
Date:   Tue, 25 Sep 2018 11:14:55 +0200
From:   David Hildenbrand <david@...hat.com>
To:     linux-mm@...ck.org
Cc:     linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-acpi@...r.kernel.org,
        xen-devel@...ts.xenproject.org, devel@...uxdriverproject.org,
        David Hildenbrand <david@...hat.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Rashmica Gupta <rashmica.g@...il.com>,
        Balbir Singh <bsingharora@...il.com>,
        Michael Neuling <mikey@...ling.org>
Subject: [PATCH v2 4/6] powerpc/powernv: hold device_hotplug_lock when calling device_online()

device_online() should be called with device_hotplug_lock() held.

Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Michael Ellerman <mpe@...erman.id.au>
Cc: Rashmica Gupta <rashmica.g@...il.com>
Cc: Balbir Singh <bsingharora@...il.com>
Cc: Michael Neuling <mikey@...ling.org>
Reviewed-by: Pavel Tatashin <pavel.tatashin@...rosoft.com>
Reviewed-by: Rashmica Gupta <rashmica.g@...il.com>
Signed-off-by: David Hildenbrand <david@...hat.com>
---
 arch/powerpc/platforms/powernv/memtrace.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/platforms/powernv/memtrace.c b/arch/powerpc/platforms/powernv/memtrace.c
index 773623f6bfb1..fdd48f1a39f7 100644
--- a/arch/powerpc/platforms/powernv/memtrace.c
+++ b/arch/powerpc/platforms/powernv/memtrace.c
@@ -242,9 +242,11 @@ static int memtrace_online(void)
 		 * we need to online the memory ourselves.
 		 */
 		if (!memhp_auto_online) {
+			lock_device_hotplug();
 			walk_memory_range(PFN_DOWN(ent->start),
 					  PFN_UP(ent->start + ent->size - 1),
 					  NULL, online_mem_block);
+			unlock_device_hotplug();
 		}
 
 		/*
-- 
2.17.1