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| author | Bastien Nocera <hadess@hadess.net> | 2022-08-30 16:25:48 +0300 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2022-09-07 23:07:49 +0300 |
| commit | f7b7393cc3b04e288de85790b1c8e62af99799c2 (patch) | |
| tree | 9048f4b2c7ba29794552813e4aa77a38dc99c710 /drivers/hid/hid-logitech-hidpp.c | |
| parent | 8544c812e43ab7bdf40458411b83987b8cba924d (diff) | |
| download | linux-f7b7393cc3b04e288de85790b1c8e62af99799c2.tar.xz | |
HID: logitech-hidpp: Fix "Sw. Id." for HID++ 2.0 commands
Always set a non-zero "Sw. Id." in the lower nibble of the Function/ASE
and Software Identifier byte in HID++ 2.0 commands.
As per the "Protocol HID++2.0 essential features" section in
https://lekensteyn.nl/files/logitech/logitech_hidpp_2.0_specification_draft_2012-06-04.pdf
"
Software identifier (4 bits, unsigned)
A number uniquely defining the software that sends a request. The
firmware must copy the software identifier in the response but does
not use it in any other ways.
0 Do not use (allows to distinguish a notification from a response).
"
Link: https://bugzilla.kernel.org/show_bug.cgi?id=215699
Signed-off-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-logitech-hidpp.c')
| -rw-r--r-- | drivers/hid/hid-logitech-hidpp.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c index 98ebedb73d98..e51ccf2c04e3 100644 --- a/drivers/hid/hid-logitech-hidpp.c +++ b/drivers/hid/hid-logitech-hidpp.c @@ -41,6 +41,9 @@ module_param(disable_tap_to_click, bool, 0644); MODULE_PARM_DESC(disable_tap_to_click, "Disable Tap-To-Click mode reporting for touchpads (only on the K400 currently)."); +/* Define a non-zero software ID to identify our own requests */ +#define LINUX_KERNEL_SW_ID 0x01 + #define REPORT_ID_HIDPP_SHORT 0x10 #define REPORT_ID_HIDPP_LONG 0x11 #define REPORT_ID_HIDPP_VERY_LONG 0x12 @@ -343,7 +346,7 @@ static int hidpp_send_fap_command_sync(struct hidpp_device *hidpp, else message->report_id = REPORT_ID_HIDPP_LONG; message->fap.feature_index = feat_index; - message->fap.funcindex_clientid = funcindex_clientid; + message->fap.funcindex_clientid = funcindex_clientid | LINUX_KERNEL_SW_ID; memcpy(&message->fap.params, params, param_count); ret = hidpp_send_message_sync(hidpp, message, response); |