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Commit 2df83fa4 authored by Minho Ban's avatar Minho Ban Committed by Rafael J. Wysocki
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PM / Hibernate: Use get_gendisk to verify partition if resume_file is integer format 



Sometimes resume= parameter comes in integer style (e.g. major:minor)
and then name_to_dev_t can not detect partition properly. (especially
async device like usb, mmc).

This patch calls get_gendisk() if resumewait is true and resume_file
is in integer format to work around this problem.

Signed-off-by: default avatarMinho Ban <mhban@samsung.com>
Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
parent 4e585d25

Documentation/kernel-parameters.txt

+2 −0
Original line number Diff line number Diff line
@@ -2372,6 +2372,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted. 


	resume=		[SWSUSP]

			Specify the partition device for software suspend

			Format:

			{/dev/<dev> | PARTUUID=<uuid> | <int>:<int> | <hex>}



	resume_offset=	[SWSUSP]

			Specify the offset from the beginning of the partition

kernel/power/hibernate.c

+13 −0
Original line number Diff line number Diff line
@@ -25,6 +25,8 @@ 
#include <linux/freezer.h>

#include <linux/gfp.h>

#include <linux/syscore_ops.h>

#include <linux/ctype.h>

#include <linux/genhd.h>

#include <scsi/scsi_scan.h>



#include "power.h"
@@ -722,6 +724,17 @@ static int software_resume(void) 


	/* Check if the device is there */

	swsusp_resume_device = name_to_dev_t(resume_file);



	/*

	 * name_to_dev_t is ineffective to verify parition if resume_file is in

	 * integer format. (e.g. major:minor)

	 */

	if (isdigit(resume_file[0]) && resume_wait) {

		int partno;

		while (!get_gendisk(swsusp_resume_device, &partno))

			msleep(10);

	}



	if (!swsusp_resume_device) {

		/*

		 * Some device discovery might still be in progress; we need