linux-kernel - [PATCH 4/6] floppy: properly handle failure on add

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Date:	Mon, 27 Aug 2012 20:56:54 -0300
From:	Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
To:	Jiri Kosina <jkosina@...e.cz>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Jens Axboe <axboe@...nel.dk>, Tejun Heo <tj@...nel.org>,
	Ben Hutchings <ben@...adent.org.uk>,
	Vivek Goyal <vgoyal@...hat.com>, linux-kernel@...r.kernel.org
Subject: [PATCH 4/6] floppy: properly handle failure on add_disk loop

On floppy initialization, if something failed inside the loop we call
add_disk, there was no cleanup of previous iterations in the error
handling.

Cc: stable@...r.kernel.org
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
---
 drivers/block/floppy.c |   11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 32551f2..2197c88 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -4293,7 +4293,7 @@ static int __init do_floppy_init(void)
 
 		err = platform_device_register(&floppy_device[drive]);
 		if (err)
-			goto out_release_dma;
+			goto out_remove_drives;
 
 		err = device_create_file(&floppy_device[drive].dev,
 					 &dev_attr_cmos);
@@ -4311,6 +4311,15 @@ static int __init do_floppy_init(void)
 
 out_unreg_platform_dev:
 	platform_device_unregister(&floppy_device[drive]);
+out_remove_drives:
+	while (drive--) {
+		if ((allowed_drive_mask & (1 << drive)) &&
+		    fdc_state[FDC(drive)].version != FDC_NONE) {
+			del_gendisk(disks[drive]);
+			device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos);
+			platform_device_unregister(&floppy_device[drive]);
+		}
+	}
 out_release_dma:
 	if (atomic_read(&usage_count))
 		floppy_release_irq_and_dma();
-- 
1.7.9.5

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