[PATCH 08/13] platform/x86: hp-bioscfg: fix ORD_LIST_ELEMENTS never being parsed

[Muhammad Bilal <meatuni001@gmail.com>]

The ACPI_TYPE_STRING case explicitly skips the string conversion for
elem == ORD_LIST_ELEMENTS:

	if (elem != PREREQUISITES && elem != ORD_LIST_ELEMENTS) {
		ret = hp_convert_hexstr_to_str(..., &str_value, &value_len);
		if (ret)
			continue;
	}

so by the time the ORD_LIST_ELEMENTS case in the eloc switch runs,
str_value is NULL (it was freed and reset to NULL at the end of the
previous iteration). That case then does:

	ret = hp_convert_hexstr_to_str(str_value, value_len, &tmpstr, &tmp_len);

hp_convert_hexstr_to_str() rejects a NULL input with -EINVAL, which
sends this function to exit_list, and exit_list unconditionally
returns 0. The net effect is that any ordered-list attribute with
elements present silently ends up with an empty elements list, with no
error surfaced anywhere.

Fix by converting the current element directly, order_obj[elem], the
same way the PREREQUISITES case already handles its own array
elements, instead of reusing the unrelated str_value/value_len left
over from earlier processing.

Fixes: 4b2672ec71a3 ("platform/x86: hp-bioscfg: order-list-attributes")
Cc: stable@vger.kernel.org
Signed-off-by: Muhammad Bilal <meatuni001@gmail.com>
---
 drivers/platform/x86/hp/hp-bioscfg/order-list-attributes.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/hp/hp-bioscfg/order-list-attributes.c b/drivers/platform/x86/hp/hp-bioscfg/order-list-attributes.c
index f09489a085c8..704c69c18146 100644
--- a/drivers/platform/x86/hp/hp-bioscfg/order-list-attributes.c
+++ b/drivers/platform/x86/hp/hp-bioscfg/order-list-attributes.c
@@ -261,7 +261,9 @@ static int hp_populate_ordered_list_elements_from_package(union acpi_object *ord
 			 * Ordered list data is stored in hex and comma separated format
 			 * Convert the data and split it to show each element
 			 */
-			ret = hp_convert_hexstr_to_str(str_value, value_len, &tmpstr, &tmp_len);
+			ret = hp_convert_hexstr_to_str(order_obj[elem].string.pointer,
+						       order_obj[elem].string.length,
+						       &tmpstr, &tmp_len);
 			if (ret)
 				goto exit_list;
 
-- 
2.55.0