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Message-Id: <20221111194526.1375601-1-abergmeier@gmx.net>
Date:   Fri, 11 Nov 2022 20:45:26 +0100
From:   Andreas Bergmeier <abergmeier@....net>
To:     lains@...eup.net, jikos@...nel.org, benjamin.tissoires@...hat.com
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/1] HID: Send SwID in GetProtocolVersion

According to docs a SwID should be sent for GetProtocolVersion.
> 0x10.DeviceIndex.0x00.0x1n
where n is SwID

Signed-off-by: Andreas Bergmeier <abergmeier@....net>
---
 drivers/hid/hid-logitech-hidpp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index a0c148a8df6c..964a523c3de7 100644
--- a/drivers/hid/hid-logitech-hidpp.c
+++ b/drivers/hid/hid-logitech-hidpp.c
@@ -896,7 +896,7 @@ static int hidpp_root_get_protocol_version(struct hidpp_device *hidpp)

 	ret = hidpp_send_rap_command_sync(hidpp,
 			HIDPP_PAGE_ROOT_IDX,
-			CMD_ROOT_GET_PROTOCOL_VERSION,
+			CMD_ROOT_GET_PROTOCOL_VERSION | LINUX_KERNEL_SW_ID,
 			ping_data, sizeof(ping_data), &response);

 	if (ret == HIDPP_ERROR_INVALID_SUBID) {
--
2.34.1

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