From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Date: Fri, 10 Aug 2018 09:13:52 +0000 (+0200)
Subject: spi: davinci: fix a NULL pointer dereference
X-Git-Tag: v4.9.126~61
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ae8f22ed6f92c3e1a7d0d4edb2d6dfbea51406b4;p=platform%2Fkernel%2Flinux-amlogic.git

spi: davinci: fix a NULL pointer dereference

commit 563a53f3906a6b43692498e5b3ae891fac93a4af upstream.

On non-OF systems spi->controlled_data may be NULL. This causes a NULL
pointer derefence on dm365-evm.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/spi/spi-davinci.c b/drivers/spi/spi-davinci.c
index 0d8f43a17edb..1905d20c229f 100644
--- a/drivers/spi/spi-davinci.c
+++ b/drivers/spi/spi-davinci.c
@@ -215,7 +215,7 @@ static void davinci_spi_chipselect(struct spi_device *spi, int value)
 	pdata = &dspi->pdata;
 
 	/* program delay transfers if tx_delay is non zero */
-	if (spicfg->wdelay)
+	if (spicfg && spicfg->wdelay)
 		spidat1 |= SPIDAT1_WDEL;
 
 	/*