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From: Christoph Hellwig <hch@lst.de>
To: Tejun Heo <tj@kernel.org>, Jens Axboe <axboe@kernel.dk>,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	Pavel Machek <pavel@ucw.cz>, Len Brown <len.brown@intel.com>,
	Minho Ban <mhban@samsung.com>
Cc: cgroups@vger.kernel.org, linux-block@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org
Subject: [PATCH 2/2] PM/hibernate: remove the bogus call to get_gendisk in software_resume
Date: Fri, 25 Sep 2020 18:14:47 +0200	[thread overview]
Message-ID: <20200925161447.1486883-3-hch@lst.de> (raw)
In-Reply-To: <20200925161447.1486883-1-hch@lst.de>

get_gendisk grabs a reference on the disk and file operation, so this
code will leak both of them while having absolutely no use for the
gendisk itself.

This effectively reverts commit 2df83fa4bce421f
("PM / Hibernate: Use get_gendisk to verify partition if resume_file is integer format")

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 kernel/power/hibernate.c | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index e7aa57fb2fdc33..7d0b99d2e69631 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -948,17 +948,6 @@ 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
-- 
2.28.0


  parent reply	other threads:[~2020-09-25 16:15 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-25 16:14 RFC: sort out get_gendisk abuses Christoph Hellwig
2020-09-25 16:14 ` [PATCH 1/2] blk-cgroup: stop abusing get_gendisk Christoph Hellwig
2020-09-25 16:14 ` Christoph Hellwig [this message]
2020-09-25 18:38   ` [PATCH 2/2] PM/hibernate: remove the bogus call to get_gendisk in software_resume Pavel Machek
2020-09-26 14:05     ` Christoph Hellwig
2020-09-30 15:45   ` Rafael J. Wysocki
2020-10-02  6:50     ` Christoph Hellwig
2020-10-02 14:11       ` Rafael J. Wysocki
2020-09-30 16:17 ` RFC: sort out get_gendisk abuses Tejun Heo

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