diff options
| -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; } /** |