spi: omap-100k: Fix the length judgment problem

[ Upstream commit e7a1a3a ]

word_len should be checked in the omap1_spi100k_setup_transfer
function to see if it exceeds 32.

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Link: https://lore.kernel.org/r/1619695248-39045-1-git-send-email-tiantao6@hisilicon.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/spi/spi-omap-100k.c

@@ -241,7 +241,7 @@ static int omap1_spi100k_setup_transfer(struct spi_device *spi,
 	else
 		word_len = spi->bits_per_word;
 
-	if (spi->bits_per_word > 32)
+	if (word_len > 32)
 		return -EINVAL;
 	cs->word_len = word_len;