Unverified Commit 2b308e71 authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Mark Brown
Browse files

spi: Replace if-else-if by bitops and multiplications 



Instead of if-else-if, simply call roundup_pow_of_two(BITS_PER_BYTES()).
Note, there is no division assumed as compiler may optimize it away.

Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230710154932.68377-4-andriy.shevchenko@linux.intel.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 440c4733

drivers/spi/spi.c

+1 −7
Original line number Diff line number Diff line
@@ -3643,13 +3643,7 @@ int spi_split_transfers_maxwords(struct spi_controller *ctlr, 
		size_t maxsize;

		int ret;



		if (xfer->bits_per_word <= 8)

			maxsize = maxwords;

		else if (xfer->bits_per_word <= 16)

			maxsize = 2 * maxwords;

		else

			maxsize = 4 * maxwords;



		maxsize = maxwords * roundup_pow_of_two(BITS_TO_BYTES(xfer->bits_per_word));

		if (xfer->len > maxsize) {

			ret = __spi_split_transfer_maxsize(ctlr, msg, &xfer,

							   maxsize, gfp);