linux-kernel - [PATCH v1 5/5] spi: fsl-spi: No need to check transfer length versus word size

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Message-Id: <9ace69a8085e22fafd9159e99edd7bbfae2f9940.1680371809.git.christophe.leroy@csgroup.eu>
Date:   Sat,  1 Apr 2023 19:59:50 +0200
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Mark Brown <broonie@...nel.org>
Cc:     Christophe Leroy <christophe.leroy@...roup.eu>,
        Grant Likely <grant.likely@...retlab.ca>,
        Anton Vorontsov <cbouatmailru@...il.com>,
        Joakim Tjernlund <Joakim.Tjernlund@...nsmode.se>,
        linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1 5/5] spi: fsl-spi: No need to check transfer length versus word size

The verification is already do in the SPI core by function
__spi_validate(), not it to check it again in fsl_spi_bufs().

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 drivers/spi/spi-fsl-spi.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/drivers/spi/spi-fsl-spi.c b/drivers/spi/spi-fsl-spi.c
index d011beddee29..9938b058c9e2 100644
--- a/drivers/spi/spi-fsl-spi.c
+++ b/drivers/spi/spi-fsl-spi.c
@@ -263,18 +263,10 @@ static int fsl_spi_bufs(struct spi_device *spi, struct spi_transfer *t,
 	if (t->bits_per_word)
 		bits_per_word = t->bits_per_word;
 
-	if (bits_per_word > 8) {
-		/* invalid length? */
-		if (len & 1)
-			return -EINVAL;
+	if (bits_per_word > 8)
 		len /= 2;
-	}
-	if (bits_per_word > 16) {
-		/* invalid length? */
-		if (len & 1)
-			return -EINVAL;
+	if (bits_per_word > 16)
 		len /= 2;
-	}
 
 	mpc8xxx_spi->tx = t->tx_buf;
 	mpc8xxx_spi->rx = t->rx_buf;
-- 
2.39.2