linux-kernel - [PATCH 4.19 19/52] spi: spi-mem: Fix inverted logic in op sanity check

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Date:   Thu, 13 Feb 2020 07:21:00 -0800
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Boris Brezillon <boris.brezillon@...tlin.com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 19/52] spi: spi-mem: Fix inverted logic in op sanity check

From: Geert Uytterhoeven <geert+renesas@...der.be>

[ Upstream commit aea3877e24f3acc6145094848dbb85f9ce85674a ]

On r8a7791/koelsch:

    m25p80 spi0.0: error -22 reading 9f
    m25p80: probe of spi0.0 failed with error -22

Apparently the logic in spi_mem_check_op() is wrong, rejecting the
spi-mem operation if any buswidth is valid, instead of invalid.

Fixes: 380583227c0c7f52 ("spi: spi-mem: Add extra sanity checks on the op param")
Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
Reviewed-by: Boris Brezillon <boris.brezillon@...tlin.com>
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/spi/spi-mem.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c
index cc3d425aae56c..62a7b80801d22 100644
--- a/drivers/spi/spi-mem.c
+++ b/drivers/spi/spi-mem.c
@@ -169,10 +169,10 @@ static int spi_mem_check_op(const struct spi_mem_op *op)
 	    (op->data.nbytes && !op->data.buswidth))
 		return -EINVAL;
 
-	if (spi_mem_buswidth_is_valid(op->cmd.buswidth) ||
-	    spi_mem_buswidth_is_valid(op->addr.buswidth) ||
-	    spi_mem_buswidth_is_valid(op->dummy.buswidth) ||
-	    spi_mem_buswidth_is_valid(op->data.buswidth))
+	if (!spi_mem_buswidth_is_valid(op->cmd.buswidth) ||
+	    !spi_mem_buswidth_is_valid(op->addr.buswidth) ||
+	    !spi_mem_buswidth_is_valid(op->dummy.buswidth) ||
+	    !spi_mem_buswidth_is_valid(op->data.buswidth))
 		return -EINVAL;
 
 	return 0;
-- 
2.20.1