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Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 X-loop: dm-devel@redhat.com Cc: linux-block@vger.kernel.org, bvanassche@acm.org, linux-scsi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, ming.lei@redhat.com, hch@infradead.org, dm-devel@redhat.com, nbd@other.debian.org, Christoph Hellwig , Luis Chamberlain Subject: [dm-devel] [PATCH v4 2/6] scsi/sr: add error handling support for add_disk() X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dm-devel-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com We never checked for errors on add_disk() as this function returned void. Now that this is fixed, use the shiny new error handling. Just put the cdrom kref and have the unwinding be done by sr_kref_release(). Reviewed-by: Christoph Hellwig Signed-off-by: Luis Chamberlain --- drivers/scsi/sr.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c index 8b17b35283aa..d769057b25a0 100644 --- a/drivers/scsi/sr.c +++ b/drivers/scsi/sr.c @@ -727,7 +727,12 @@ static int sr_probe(struct device *dev) dev_set_drvdata(dev, cd); disk->flags |= GENHD_FL_REMOVABLE; sr_revalidate_disk(cd); - device_add_disk(&sdev->sdev_gendev, disk, NULL); + + error = device_add_disk(&sdev->sdev_gendev, disk, NULL); + if (error) { + kref_put(&cd->kref, sr_kref_release); + goto fail; + } sdev_printk(KERN_DEBUG, sdev, "Attached scsi CD-ROM %s\n", cd->cdi.name);