Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752761AbaA2XtA (ORCPT ); Wed, 29 Jan 2014 18:49:00 -0500 Received: from mail-pa0-f44.google.com ([209.85.220.44]:45449 "EHLO mail-pa0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752212AbaA2Xs5 (ORCPT ); Wed, 29 Jan 2014 18:48:57 -0500 From: Sebastian Capella To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-pm@vger.kernel.org, linaro-kernel@lists.linaro.org, patches@linaro.org Cc: Sebastian Capella , Pavel Machek , Len Brown , "Rafael J. Wysocki" Subject: [PATCH v4 2/2] PM / Hibernate: use name_to_dev_t to parse resume Date: Wed, 29 Jan 2014 15:48:24 -0800 Message-Id: <1391039304-3172-3-git-send-email-sebastian.capella@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1391039304-3172-1-git-send-email-sebastian.capella@linaro.org> References: <1391039304-3172-1-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: Pavel Machek Cc: Len Brown Cc: "Rafael J. Wysocki" --- kernel/power/hibernate.c | 33 +++++++++++++++++---------------- 1 file changed, 17 insertions(+), 16 deletions(-) diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c index 37170d4..b4a3e0b 100644 --- a/kernel/power/hibernate.c +++ b/kernel/power/hibernate.c @@ -973,26 +973,27 @@ 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; + char *name = kstrimdup(buf, GFP_KERNEL); - if (sscanf(buf, "%u:%u", &maj, &min) != 2) - goto out; + if (name == NULL) + return -ENOMEM; - res = MKDEV(maj,min); - if (maj != MAJOR(res) || min != MINOR(res)) - goto out; + res = name_to_dev_t(name); - lock_system_sleep(); - swsusp_resume_device = res; - unlock_system_sleep(); - printk(KERN_INFO "PM: Starting manual resume from disk\n"); - noresume = 0; - software_resume(); - ret = n; - out: - return ret; + if (res != 0) { + lock_system_sleep(); + swsusp_resume_device = res; + unlock_system_sleep(); + printk(KERN_INFO "PM: Starting manual resume from disk\n"); + noresume = 0; + software_resume(); + } else { + n = -EINVAL; + } + + kfree(name); + 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/