From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Wed, 27 Aug 2014 16:26:08 +0000 (+0300)
Subject: spi: dw: fix kernel crash due to NULL pointer dereference
X-Git-Tag: Ubuntu-5.13.0-19.19~19487^2~1^2^5
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=08a707b87874eaaa0f336ab604ecd6e5e9f286dd;p=mirror_ubuntu-jammy-kernel.git

spi: dw: fix kernel crash due to NULL pointer dereference

The obvious fix after the commit d9c73bb8a3a5 "spi: dw: add support for gpio
controlled chip select". This patch fixes the issue by using locally defined
temporary variable.

Fixes: d9c73bb8a3a5 (spi: dw: add support for gpio controlled chip select)
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Cc: <stable@vger.kernel.org>
---

diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c
index 29f33143b795..670f0627f3bf 100644
--- a/drivers/spi/spi-dw.c
+++ b/drivers/spi/spi-dw.c
@@ -271,7 +271,7 @@ static void giveback(struct dw_spi *dws)
 					transfer_list);
 
 	if (!last_transfer->cs_change)
-		spi_chip_sel(dws, dws->cur_msg->spi, 0);
+		spi_chip_sel(dws, msg->spi, 0);
 
 	spi_finalize_current_message(dws->master);
 }