On 03.06.19 15:42, Cornelia Huck wrote:
On Mon, 3 Jun 2019 14:45:03 +0200
Michael Mueller <mimu@xxxxxxxxxxxxx> wrote:
On 03.06.19 14:06, Cornelia Huck wrote:
On Wed, 29 May 2019 14:26:52 +0200
Michael Mueller <mimu@xxxxxxxxxxxxx> wrote:
@@ -1593,20 +1625,31 @@ struct ccw_device * __init ccw_device_create_console(struct ccw_driver *drv)
return ERR_CAST(sch);
io_priv = kzalloc(sizeof(*io_priv), GFP_KERNEL | GFP_DMA);
- if (!io_priv) {
- put_device(&sch->dev);
- return ERR_PTR(-ENOMEM);
- }
+ if (!io_priv)
+ goto err_priv;
+ io_priv->dma_area = dma_alloc_coherent(&sch->dev,
+ sizeof(*io_priv->dma_area),
+ &io_priv->dma_area_dma, GFP_KERNEL);
+ if (!io_priv->dma_area)
+ goto err_dma_area;
set_io_private(sch, io_priv);
cdev = io_subchannel_create_ccwdev(sch);
if (IS_ERR(cdev)) {
put_device(&sch->dev);
+ dma_free_coherent(&sch->dev, sizeof(*io_priv->dma_area),
+ io_priv->dma_area, io_priv->dma_area_dma);
kfree(io_priv);
<pre-existing, not introduced by this patch>
Shouldn't that branch do set_io_private(sch, NULL)? Not sure if any
code would make use of it, but it's probably better to clean out
references to freed objects.
Added behind kfree(). I hope nobody asks for a separate patch. ;)
I would probably have added it just before the kfree, but I'm not
asking for a separate patch ;)
I moved it.
</pre-existing, not introduced by this patch>
return cdev;
}
cdev->drv = drv;
ccw_device_set_int_class(cdev);
return cdev;
+
+err_dma_area:
+ kfree(io_priv);
+err_priv:
+ put_device(&sch->dev);
+ return ERR_PTR(-ENOMEM);
}
void __init ccw_device_destroy_console(struct ccw_device *cdev)
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