From: Simon Glass <sjg@chromium.org>
Date: Sun, 2 Feb 2020 20:37:06 +0000 (-0700)
Subject: x86: Correct error return value in mrccache_get_region()
X-Git-Url: http://git.dujemihanovic.xyz/img/sics.gif?a=commitdiff_plain;h=7149d3800558df4b5ba535472c6968ea9b2332c9;p=u-boot.git

x86: Correct error return value in mrccache_get_region()

This function doesn't use uclass_find_first_device() correctly. Add a
check that the device is found so we don't try to read properties from a
NULL device.

The fixes booting on minnoxmax.

Fixes: 87f1084a630 ("x86: Adjust mrccache_get_region() to use livetree")

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
---

diff --git a/arch/x86/lib/mrccache.c b/arch/x86/lib/mrccache.c
index 8914960226..d1c44f290c 100644
--- a/arch/x86/lib/mrccache.c
+++ b/arch/x86/lib/mrccache.c
@@ -241,6 +241,8 @@ int mrccache_get_region(enum mrc_type_t type, struct udevice **devp,
 	 * memory map cannot be read.
 	 */
 	ret = uclass_find_first_device(UCLASS_SPI_FLASH, &dev);
+	if (!ret && !dev)
+		ret = -ENODEV;
 	if (ret)
 		return log_msg_ret("Cannot find SPI flash\n", ret);
 	ret = dm_spi_get_mmap(dev, &map_base, &map_size, &offset);