Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752882AbaBNWxQ (ORCPT ); Fri, 14 Feb 2014 17:53:16 -0500 Received: from mail-pa0-f50.google.com ([209.85.220.50]:40602 "EHLO mail-pa0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752397AbaBNWxD (ORCPT ); Fri, 14 Feb 2014 17:53:03 -0500 From: Sebastian Capella To: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, linaro-kernel@lists.linaro.org Cc: Sebastian Capella , Len Brown , Pavel Machek , "Rafael J. Wysocki" Subject: [PATCH v9] PM / Hibernate: use name_to_dev_t to parse resume Date: Fri, 14 Feb 2014 14:52:56 -0800 Message-Id: <1392418376-30060-2-git-send-email-sebastian.capella@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1392418376-30060-1-git-send-email-sebastian.capella@linaro.org> References: <1392418376-30060-1-git-send-email-sebastian.capella@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Use the name_to_dev_t call to parse the device name echo'd to to /sys/power/resume. This imitates the method used in hibernate.c in software_resume, and allows the resume partition to be specified using other equivalent device formats as well. By allowing /sys/debug/resume to accept the same syntax as the resume=device parameter, we can parse the resume=device in the init script and use the resume device directly from the kernel command line. Signed-off-by: Sebastian Capella Cc: Len Brown Cc: Pavel Machek Cc: "Rafael J. Wysocki" --- kernel/power/hibernate.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c index 0121dab..a5f702a 100644 --- a/kernel/power/hibernate.c +++ b/kernel/power/hibernate.c @@ -972,16 +972,20 @@ static ssize_t resume_show(struct kobject *kobj, struct kobj_attribute *attr, static ssize_t resume_store(struct kobject *kobj, struct kobj_attribute *attr, const char *buf, size_t n) { - unsigned int maj, min; dev_t res; - int ret = -EINVAL; + int len = n; + char *name; - if (sscanf(buf, "%u:%u", &maj, &min) != 2) - goto out; + if (len && buf[len-1] == '\n') + len--; + name = kstrndup(buf, len, GFP_KERNEL); + if (!name) + return -ENOMEM; - res = MKDEV(maj,min); - if (maj != MAJOR(res) || min != MINOR(res)) - goto out; + res = name_to_dev_t(name); + kfree(name); + if (!res) + return -EINVAL; lock_system_sleep(); swsusp_resume_device = res; @@ -989,9 +993,7 @@ static ssize_t resume_store(struct kobject *kobj, struct kobj_attribute *attr, printk(KERN_INFO "PM: Starting manual resume from disk\n"); noresume = 0; software_resume(); - ret = n; - out: - return ret; + return n; } power_attr(resume); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/