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@vger.kernel.org
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 9a558b6..2c72573 100644 (file)
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -4292,7 +4292,7 @@ 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);
@@ -4310,6 +4310,15 @@ 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();