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Subject[PATCH v3 4/6] floppy: properly handle failure on add_disk loop
Date
On do_floppy_init, if something failed inside the loop we call add_disk,
there was no cleanup of previous iterations in the error handling.

Cc: stable@vger.kernel.org
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com>
---
drivers/block/floppy.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 9272203..3eafe93 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -4294,7 +4294,7 @@ 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);
@@ -4313,6 +4313,14 @@ static int __init do_floppy_init(void)

out_unreg_platform_dev:
platform_device_unregister(&floppy_device[drive]);
+out_remove_drives:
+ while (drive--) {
+ if (disk_registered[drive]) {
+ 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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