linux-kernel - [PATCH v1 4/4] ACPI: memhotplug: memory resources cannot be enabled yet

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Message-Id: <20210712124052.26491-5-david@redhat.com>
Date:   Mon, 12 Jul 2021 14:40:52 +0200
From:   David Hildenbrand <david@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-mm@...ck.org, David Hildenbrand <david@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Pankaj Gupta <pankaj.gupta.linux@...il.com>,
        Wei Yang <richard.weiyang@...ux.alibaba.com>,
        Oscar Salvador <osalvador@...e.de>,
        Michal Hocko <mhocko@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Anshuman Khandual <anshuman.khandual@....com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Mike Rapoport <rppt@...nel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        Pavel Tatashin <pasha.tatashin@...een.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Catalin Marinas <catalin.marinas@....com>,
        virtualization@...ts.linux-foundation.org,
        linux-acpi@...r.kernel.org, Andy Lutomirski <luto@...nel.org>,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>,
        Anton Blanchard <anton@...abs.org>,
        Ard Biesheuvel <ardb@...nel.org>, Baoquan He <bhe@...hat.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Borislav Petkov <bp@...en8.de>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Christophe Leroy <christophe.leroy@....fr>,
        Dave Jiang <dave.jiang@...el.com>,
        "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
        Jia He <justin.he@....com>, Joe Perches <joe@...ches.com>,
        Kefeng Wang <wangkefeng.wang@...wei.com>,
        Laurent Dufour <ldufour@...ux.ibm.com>,
        Michel Lespinasse <michel@...pinasse.org>,
        Nathan Lynch <nathanl@...ux.ibm.com>,
        Nicholas Piggin <npiggin@...il.com>,
        Paul Mackerras <paulus@...ba.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Pierre Morel <pmorel@...ux.ibm.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Rich Felker <dalias@...c.org>,
        Scott Cheloha <cheloha@...ux.ibm.com>,
        Sergei Trofimovich <slyfox@...too.org>,
        Thiago Jung Bauermann <bauerman@...ux.ibm.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Will Deacon <will@...nel.org>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>
Subject: [PATCH v1 4/4] ACPI: memhotplug: memory resources cannot be enabled yet

We allocate + initialize everything from scratch. In case enabling the
device fails, we free all memory resourcs.

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Cc: Len Brown <lenb@...nel.org>
Cc: linux-acpi@...r.kernel.org
Signed-off-by: David Hildenbrand <david@...hat.com>
---
 drivers/acpi/acpi_memhotplug.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index 1d01d9414c40..eb4faf7c5cad 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -182,10 +182,6 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device)
 	 * (i.e. memory-hot-remove function)
 	 */
 	list_for_each_entry(info, &mem_device->res_list, list) {
-		if (info->enabled) { /* just sanity check...*/
-			num_enabled++;
-			continue;
-		}
 		/*
 		 * If the memory block size is zero, please ignore it.
 		 * Don't try to do the following memory hotplug flowchart.
-- 
2.31.1