media: rc: imon_raw: use fls rather than loop per bit

	struct device *dev;

	struct urb *ir_urb;

	struct rc_dev *rcdev;

	u8 ir_buf[8];

	u8 ir_buf[8] __aligned(__alignof__(u64));

	char phys[64];

};

/*

 * ffs/find_next_bit() searches in the wrong direction, so open-code our own.

 * The first 5 bytes of data represent IR pulse or space. Each bit, starting

 * from highest bit in the first byte, represents 250µs of data. It is 1

 * for space and 0 for pulse.

 *

 * The station sends 10 packets, and the 7th byte will be number 1 to 10, so

 * when we receive 10 we assume all the data has arrived.

 */

static inline int is_bit_set(const u8 *buf, int bit)

{

	return buf[bit / 8] & (0x80 >> (bit & 7));

}

static void imon_ir_data(struct imon *imon)

{

	struct ir_raw_event rawir = {};

	int offset = 0, size = 5 * 8;

	u64 d = be64_to_cpup((__be64 *)imon->ir_buf) >> 24;

	int offset = 40;

	int bit;

	dev_dbg(imon->dev, "data: %*ph", 8, imon->ir_buf);

	while (offset < size) {

		bit = offset;

		while (!is_bit_set(imon->ir_buf, bit) && bit < size)

			bit++;

		dev_dbg(imon->dev, "pulse: %d bits", bit - offset);

		if (bit > offset) {

	do {

		bit = fls64(d & (BIT_ULL(offset) - 1));

		if (bit < offset) {

			dev_dbg(imon->dev, "pulse: %d bits", offset - bit);

			rawir.pulse = true;

			rawir.duration = (bit - offset) * BIT_DURATION;

			rawir.duration = (offset - bit) * BIT_DURATION;

			ir_raw_event_store_with_filter(imon->rcdev, &rawir);

		}

		if (bit >= size)

			if (bit == 0)

				break;

			offset = bit;

		while (is_bit_set(imon->ir_buf, bit) && bit < size)

			bit++;

		dev_dbg(imon->dev, "space: %d bits", bit - offset);

		}

		bit = fls64(~d & (BIT_ULL(offset) - 1));

		dev_dbg(imon->dev, "space: %d bits", offset - bit);

		rawir.pulse = false;

		rawir.duration = (bit - offset) * BIT_DURATION;

		rawir.duration = (offset - bit) * BIT_DURATION;

		ir_raw_event_store_with_filter(imon->rcdev, &rawir);

		offset = bit;

	}

	} while (offset > 0);

	if (imon->ir_buf[7] == 0x0a) {

		ir_raw_event_set_idle(imon->rcdev, true);