This is a note to let you know that I've just added the patch titled HID: logitech-hidpp: Silence intermittent get_battery_capacity errors to the 5.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: hid-logitech-hidpp-silence-intermittent-get_battery_.patch and it can be found in the queue-5.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 13307dd2bde132a49a0876ee6c2cdb42eb417f14 Author: Hans de Goede <hdegoede@xxxxxxxxxx> Date: Thu Nov 14 15:30:46 2019 +0100 HID: logitech-hidpp: Silence intermittent get_battery_capacity errors [ Upstream commit 61005d65b6c7dcf61c19516e6ebe5acc02d2cdda ] My Logitech M185 (PID:4038) 2.4 GHz wireless HID++ mouse is causing intermittent errors like these in the log: [11091.034857] logitech-hidpp-device 0003:046D:4038.0006: hidpp20_batterylevel_get_battery_capacity: received protocol error 0x09 [12388.031260] logitech-hidpp-device 0003:046D:4038.0006: hidpp20_batterylevel_get_battery_capacity: received protocol error 0x09 [16613.718543] logitech-hidpp-device 0003:046D:4038.0006: hidpp20_batterylevel_get_battery_capacity: received protocol error 0x09 [23529.938728] logitech-hidpp-device 0003:046D:4038.0006: hidpp20_batterylevel_get_battery_capacity: received protocol error 0x09 We are already silencing error-code 0x09 (HIDPP_ERROR_RESOURCE_ERROR) errors in other places, lets do the same in hidpp20_batterylevel_get_battery_capacity to remove these harmless, but scary looking errors from the dmesg output. Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> Signed-off-by: Jiri Kosina <jkosina@xxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c index 8e91e2f06cb4..cd9193078525 100644 --- a/drivers/hid/hid-logitech-hidpp.c +++ b/drivers/hid/hid-logitech-hidpp.c @@ -1102,6 +1102,9 @@ static int hidpp20_batterylevel_get_battery_capacity(struct hidpp_device *hidpp, ret = hidpp_send_fap_command_sync(hidpp, feature_index, CMD_BATTERY_LEVEL_STATUS_GET_BATTERY_LEVEL_STATUS, NULL, 0, &response); + /* Ignore these intermittent errors */ + if (ret == HIDPP_ERROR_RESOURCE_ERROR) + return -EIO; if (ret > 0) { hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n", __func__, ret);