From: jeffrey.lin <jeffrey.lin@xxxxxxxxxx> commit fafd320ae51b9c72d371585b2501f86640ea7b7d upstream. Add default write command package to prevent i2c quirk error of zero data length as Raydium touch firmware update is executed. Signed-off-by: jeffrey.lin <jeffrey.lin@xxxxxxxxxx> Link: https://lore.kernel.org/r/1608031217-7247-1-git-send-email-jeffrey.lin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/input/touchscreen/raydium_i2c_ts.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/input/touchscreen/raydium_i2c_ts.c +++ b/drivers/input/touchscreen/raydium_i2c_ts.c @@ -445,6 +445,7 @@ static int raydium_i2c_write_object(stru enum raydium_bl_ack state) { int error; + static const u8 cmd[] = { 0xFF, 0x39 }; error = raydium_i2c_send(client, RM_CMD_BOOT_WRT, data, len); if (error) { @@ -453,7 +454,7 @@ static int raydium_i2c_write_object(stru return error; } - error = raydium_i2c_send(client, RM_CMD_BOOT_ACK, NULL, 0); + error = raydium_i2c_send(client, RM_CMD_BOOT_ACK, cmd, sizeof(cmd)); if (error) { dev_err(&client->dev, "Ack obj command failed: %d\n", error); return error;
