linux-kernel - [PATCH] X86/acpi: remove redundant logic of acpi memory hotadd

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Date:	Wed, 14 Nov 2012 11:47:13 +0000
From:	"Liu, Jinsong" <jinsong.liu@...el.com>
To:	"Brown, Len" <len.brown@...el.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] X86/acpi: remove redundant logic of acpi memory hotadd

>From 1d39279e45c54ce531691da5ffe261e7689dd92c Mon Sep 17 00:00:00 2001
From: Liu Jinsong <jinsong.liu@...el.com>
Date: Wed, 14 Nov 2012 18:52:06 +0800
Subject: [PATCH] X86/acpi: remove redundant logic of acpi memory hotadd

When memory hotadd, acpi_memory_enable_device has already been done
at drv->ops.add (acpi_memory_device_add), no need to do it again
at notify callback.

At acpi_memory_enable_device, acpi_memory_get_device_resources
is also a redundant action, since it has been done at drv->ops.add.

Signed-off-by: Liu Jinsong <jinsong.liu@...el.com>
---
 drivers/acpi/acpi_memhotplug.c |   17 -----------------
 1 files changed, 0 insertions(+), 17 deletions(-)

diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index 24c807f..a6489fd 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -220,15 +220,6 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device)
 	struct acpi_memory_info *info;
 	int node;
 
-
-	/* Get the range from the _CRS */
-	result = acpi_memory_get_device_resources(mem_device);
-	if (result) {
-		printk(KERN_ERR PREFIX "get_device_resources failed\n");
-		mem_device->state = MEMORY_INVALID_STATE;
-		return result;
-	}
-
 	node = acpi_get_node(mem_device->device->handle);
 	/*
 	 * Tell the VM there is more memory here...
@@ -357,14 +348,6 @@ static void acpi_memory_device_notify(acpi_handle handle, u32 event, void *data)
 			break;
 		}
 
-		if (acpi_memory_check_device(mem_device))
-			break;
-
-		if (acpi_memory_enable_device(mem_device)) {
-			printk(KERN_ERR PREFIX "Cannot enable memory device\n");
-			break;
-		}
-
 		ost_code = ACPI_OST_SC_SUCCESS;
 		break;
 
-- 
1.7.1

Download attachment "0001-X86-acpi-remove-redundant-logic-of-acpi-memory-hotad.patch" of type "application/octet-stream" (1705 bytes)