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| author | Minho Ban <mhban@samsung.com> | 2012-05-14 21:45:31 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2012-05-18 20:44:59 +0200 |
| commit | 2df83fa4bce421f8176932142f1004adfba0f9dd (patch) | |
| tree | edd5051c5b388e82d8954ec09643873be9bc414c | |
| parent | 4e585d25e120f1eae0a3a8bf8f6ebc7692afec18 (diff) | |
| download | linux-stable-2df83fa4bce421f8176932142f1004adfba0f9dd.tar.gz linux-stable-2df83fa4bce421f8176932142f1004adfba0f9dd.tar.bz2 linux-stable-2df83fa4bce421f8176932142f1004adfba0f9dd.zip | |
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: Minho Ban <mhban@samsung.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
| -rw-r--r-- | Documentation/kernel-parameters.txt | 2 | ||||
| -rw-r--r-- | kernel/power/hibernate.c | 13 |
2 files changed, 15 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index c1601e5a8b71..5900b49323cc 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -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 diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c index e09dfbfeecee..8b53db38a279 100644 --- a/kernel/power/hibernate.c +++ b/kernel/power/hibernate.c @@ -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 |