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| author | Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2014-02-20 15:24:49 -0500 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2014-02-24 17:23:15 +0100 |
| commit | 3c86726cfe38952f0366f86acfbbb025813ec1c2 (patch) | |
| tree | 74192839f11f698ee74ea55b4c17717e4c1bffba | |
| parent | 2ebaebcf31096f83401c850393e93bc8f28db0e9 (diff) | |
| download | linux-stable-3c86726cfe38952f0366f86acfbbb025813ec1c2.tar.gz linux-stable-3c86726cfe38952f0366f86acfbbb025813ec1c2.tar.bz2 linux-stable-3c86726cfe38952f0366f86acfbbb025813ec1c2.zip | |
HID: make .raw_request mandatory
SET_REPORT and GET_REPORT are mandatory in the HID specification.
Make the corresponding API in hid-core mandatory too, which removes the
need to test against it in some various places.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| -rw-r--r-- | Documentation/hid/hid-transport.txt | 3 | ||||
| -rw-r--r-- | drivers/hid/hid-core.c | 11 | ||||
| -rw-r--r-- | drivers/hid/hid-input.c | 4 | ||||
| -rw-r--r-- | include/linux/hid.h | 5 |
4 files changed, 12 insertions, 11 deletions
diff --git a/Documentation/hid/hid-transport.txt b/Documentation/hid/hid-transport.txt index 9dbbceaef4f3..3dcba9fd4a3a 100644 --- a/Documentation/hid/hid-transport.txt +++ b/Documentation/hid/hid-transport.txt @@ -283,7 +283,8 @@ The available HID callbacks are: int reqtype) Same as ->request() but provides the report as raw buffer. This request shall be synchronous. A transport driver must not use ->wait() to complete such - requests. + requests. This request is mandatory and hid core will reject the device if + it is missing. - int (*output_report) (struct hid_device *hdev, __u8 *buf, size_t len) Send raw output report via intr channel. Used by some HID device drivers diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c index b6ae69711d2a..0b57babe3f9f 100644 --- a/drivers/hid/hid-core.c +++ b/drivers/hid/hid-core.c @@ -1330,9 +1330,6 @@ void __hid_request(struct hid_device *hid, struct hid_report *report, int ret; int len; - if (!hid->ll_driver->raw_request) - return; - buf = hid_alloc_report_buf(report, GFP_KERNEL); if (!buf) return; @@ -2472,6 +2469,14 @@ int hid_add_device(struct hid_device *hdev) return -ENODEV; /* + * Check for the mandatory transport channel. + */ + if (!hdev->ll_driver->raw_request) { + hid_err(hdev, "transport driver missing .raw_request()\n"); + return -EINVAL; + } + + /* * Read the device report descriptor once and use as template * for the driver-specific modifications. */ diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c index 310b96779e8e..f5aef792f13b 100644 --- a/drivers/hid/hid-input.c +++ b/drivers/hid/hid-input.c @@ -1266,9 +1266,7 @@ static struct hid_input *hidinput_allocate(struct hid_device *hid) } input_set_drvdata(input_dev, hid); - if (hid->ll_driver->request || hid->ll_driver->output_report || - hid->ll_driver->raw_request) - input_dev->event = hidinput_input_event; + input_dev->event = hidinput_input_event; input_dev->open = hidinput_open; input_dev->close = hidinput_close; input_dev->setkeycode = hidinput_setkeycode; diff --git a/include/linux/hid.h b/include/linux/hid.h index 60f3ff762376..5eb282e0dff7 100644 --- a/include/linux/hid.h +++ b/include/linux/hid.h @@ -992,11 +992,8 @@ static inline int hid_hw_raw_request(struct hid_device *hdev, if (len < 1 || len > HID_MAX_BUFFER_SIZE || !buf) return -EINVAL; - if (hdev->ll_driver->raw_request) - return hdev->ll_driver->raw_request(hdev, reportnum, buf, len, + return hdev->ll_driver->raw_request(hdev, reportnum, buf, len, rtype, reqtype); - - return -ENOSYS; } /** |