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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: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230710154932.68377-4-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Andy Shevchenko 2023-07-10 18:49:20 +03:00 committed by Mark Brown
parent 440c47331b
commit 2b308e7176
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1 changed files with 1 additions and 7 deletions
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8
drivers/spi/spi.c
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@ -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);