[PATCH 4/4] uio: uio_hv_generic: use devm_kzalloc() for private data alloc

From: Alexandru Ardelean
Date: Thu Nov 19 2020 - 10:44:54 EST


This is a minor cleanup for the management of the private object of this
driver. The allocation can be tied to the life-time of the hv_device
object.
This cleans up a bit the exit & error paths, since the object doesn't need
to be explicitly free'd anymore.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx>
---
drivers/uio/uio_hv_generic.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/uio/uio_hv_generic.c b/drivers/uio/uio_hv_generic.c
index 4dae2320b103..0330ba99730e 100644
--- a/drivers/uio/uio_hv_generic.c
+++ b/drivers/uio/uio_hv_generic.c
@@ -247,14 +247,14 @@ hv_uio_probe(struct hv_device *dev,
return -ENOTSUPP;
}

- pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
+ pdata = devm_kzalloc(&dev->device, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return -ENOMEM;

ret = vmbus_alloc_ring(channel, HV_RING_SIZE * PAGE_SIZE,
HV_RING_SIZE * PAGE_SIZE);
if (ret)
- goto fail;
+ return ret;

set_channel_read_mode(channel, HV_CALL_ISR);

@@ -347,8 +347,6 @@ hv_uio_probe(struct hv_device *dev,

fail_close:
hv_uio_cleanup(dev, pdata);
-fail:
- kfree(pdata);

return ret;
}
@@ -364,10 +362,8 @@ hv_uio_remove(struct hv_device *dev)
sysfs_remove_bin_file(&dev->channel->kobj, &ring_buffer_bin_attr);
uio_unregister_device(&pdata->info);
hv_uio_cleanup(dev, pdata);
- hv_set_drvdata(dev, NULL);

vmbus_free_ring(dev->channel);
- kfree(pdata);
return 0;
}

--
2.17.1