[PATCH v2] part: Add check for NULL dev_part_str

[Tom Rini]

On Sat, May 15, 2021 at 02:13:54PM -0400, Sean Anderson wrote:

> Some callers (e.g. cmd/fs.c) of fs_set_blk_dev may use a NULL dev_part_str.
> While blk_get_device_part_str handles this fine,
> part_get_info_by_dev_and_name does not. This fixes commands crashing when
> implicitly using bootdevice.
> 
> The unit test has also been updated to set bootdevice to a known value and
> to restore it after we are done.
> 
> Fixes: 7194527b6a ("cmd: fs: Use part_get_info_by_dev_and_name_or_num to parse partitions")
> Reported-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
> Signed-off-by: Sean Anderson <seanga2 at gmail.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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