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x86: Correct error return value in mrccache_get_region()

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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: 87f1084a63 ("x86: Adjust mrccache_get_region() to use livetree")

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2020-02-02 13:37:06 -07:00 committed by Bin Meng
parent d16e18ca6c
commit 7149d38005
1 changed files with 2 additions and 0 deletions
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arch/x86/lib/mrccache.c
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@ -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);