linux-kernel - [PATCH 4.9 113/130] mtd: spi-nor: Off by one in cqspi_setup

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Date:   Tue, 24 Jan 2017 08:55:53 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Marek Vasut <marex@...x.de>,
        Cyrille Pitchen <cyrille.pitchen@...el.com>
Subject: [PATCH 4.9 113/130] mtd: spi-nor: Off by one in cqspi_setup_flash()

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@...cle.com>

commit 193e87143c290ec16838f5368adc0e0bc94eb931 upstream.

There are CQSPI_MAX_CHIPSELECT elements in the ->f_pdata array so the >
should be >=.

Fixes: 140623410536 ('mtd: spi-nor: Add driver for Cadence Quad SPI Flash Controller')
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Reviewed-by: Marek Vasut <marex@...x.de>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/mtd/spi-nor/cadence-quadspi.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/mtd/spi-nor/cadence-quadspi.c
+++ b/drivers/mtd/spi-nor/cadence-quadspi.c
@@ -1082,7 +1082,7 @@ static int cqspi_setup_flash(struct cqsp
 			goto err;
 		}
 
-		if (cs > CQSPI_MAX_CHIPSELECT) {
+		if (cs >= CQSPI_MAX_CHIPSELECT) {
 			dev_err(dev, "Chip select %d out of range.\n", cs);
 			goto err;
 		}