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author | Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2013-07-24 19:38:04 +0200 |
---|---|---|
committer | Jiri Kosina <jkosina@suse.cz> | 2013-07-31 10:12:28 +0200 |
commit | abf832bfc349b54fd500f1e3b612f7f3cd9dfcc6 (patch) | |
tree | 4ece0e75cf3fd463be58376e3f900c1cfd60dd05 /drivers/hid/hid-zydacron.c | |
parent | 3366dd9fa887ebbda4872e9554f853eaeda764be (diff) | |
download | linux-abf832bfc349b54fd500f1e3b612f7f3cd9dfcc6.tar.gz linux-abf832bfc349b54fd500f1e3b612f7f3cd9dfcc6.tar.xz |
HID: trivial devm conversion for special hid drivers
It is safe to use devres allocation within the hid subsystem:
- the devres release is called _after_ the call to .remove(), meaning
that no freed pointers will exists while removing the device
- if a .probe() fails, devres releases all the allocated ressources
before going to the next driver: there will not be ghost ressources
attached to a hid device if several drivers are probed.
Given that, we can clean up a little some of the HID drivers. These ones
are trivial:
- there is only one kzalloc in the driver
- the .remove() callback contains only one kfree on top of hid_hw_stop()
- the error path in the probe is easy enough to be manually checked
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-zydacron.c')
-rw-r--r-- | drivers/hid/hid-zydacron.c | 19 |
1 files changed, 3 insertions, 16 deletions
diff --git a/drivers/hid/hid-zydacron.c b/drivers/hid/hid-zydacron.c index e4cddeccd6b5..1a660bd97ab2 100644 --- a/drivers/hid/hid-zydacron.c +++ b/drivers/hid/hid-zydacron.c @@ -169,7 +169,7 @@ static int zc_probe(struct hid_device *hdev, const struct hid_device_id *id) int ret; struct zc_device *zc; - zc = kzalloc(sizeof(*zc), GFP_KERNEL); + zc = devm_kzalloc(&hdev->dev, sizeof(*zc), GFP_KERNEL); if (zc == NULL) { hid_err(hdev, "can't alloc descriptor\n"); return -ENOMEM; @@ -180,28 +180,16 @@ static int zc_probe(struct hid_device *hdev, const struct hid_device_id *id) ret = hid_parse(hdev); if (ret) { hid_err(hdev, "parse failed\n"); - goto err_free; + return ret; } ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); if (ret) { hid_err(hdev, "hw start failed\n"); - goto err_free; + return ret; } return 0; -err_free: - kfree(zc); - - return ret; -} - -static void zc_remove(struct hid_device *hdev) -{ - struct zc_device *zc = hid_get_drvdata(hdev); - - hid_hw_stop(hdev); - kfree(zc); } static const struct hid_device_id zc_devices[] = { @@ -217,7 +205,6 @@ static struct hid_driver zc_driver = { .input_mapping = zc_input_mapping, .raw_event = zc_raw_event, .probe = zc_probe, - .remove = zc_remove, }; module_hid_driver(zc_driver); |