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| author | Jan Kara <jack@suse.cz> | 2017-03-08 14:56:05 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-16 10:33:53 +0100 |
| commit | 40b2b6453f89ee1343de00b7822b0eec5b17aaa2 (patch) | |
| tree | 71a763389fbd6fffbca99f1f76ec4f3f04938d04 | |
| parent | f2396d60746fd2d3c9e038ecba03aaa09dab5134 (diff) | |
| download | linux-stable-40b2b6453f89ee1343de00b7822b0eec5b17aaa2.tar.gz linux-stable-40b2b6453f89ee1343de00b7822b0eec5b17aaa2.tar.bz2 linux-stable-40b2b6453f89ee1343de00b7822b0eec5b17aaa2.zip | |
axonram: Fix gendisk handling
[ Upstream commit 672a2c87c83649fb0167202342ce85af9a3b4f1c ]
It is invalid to call del_gendisk() when disk->queue is NULL. Fix error
handling in axon_ram_probe() to avoid doing that.
Also del_gendisk() does not drop a reference to gendisk allocated by
alloc_disk(). That has to be done by put_disk(). Add that call where
needed.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/powerpc/sysdev/axonram.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/powerpc/sysdev/axonram.c b/arch/powerpc/sysdev/axonram.c index 7a399b4d60a0..566e8fc341f3 100644 --- a/arch/powerpc/sysdev/axonram.c +++ b/arch/powerpc/sysdev/axonram.c @@ -276,7 +276,9 @@ failed: if (bank->disk->major > 0) unregister_blkdev(bank->disk->major, bank->disk->disk_name); - del_gendisk(bank->disk); + if (bank->disk->flags & GENHD_FL_UP) + del_gendisk(bank->disk); + put_disk(bank->disk); } device->dev.platform_data = NULL; if (bank->io_addr != 0) @@ -301,6 +303,7 @@ axon_ram_remove(struct platform_device *device) device_remove_file(&device->dev, &dev_attr_ecc); free_irq(bank->irq_id, device); del_gendisk(bank->disk); + put_disk(bank->disk); iounmap((void __iomem *) bank->io_addr); kfree(bank); |