Hi Hans,
On Mon, Aug 14, 2023 at 3:41 AM Hans de Goede <hdegoede@xxxxxxxxxx> wrote:
>
> Hi Jorge,
>
> On 8/9/23 23:07, Jorge Lopez wrote:
> > Update steps how order list elements data and elements size are
> > evaluated
> >
> > Signed-off-by: Jorge Lopez <jorge.lopez2@xxxxxx>
> >
> > ---
> > Based on the latest platform-drivers-x86.git/for-next
> > ---
> > .../x86/hp/hp-bioscfg/order-list-attributes.c | 16 ++++++++++++++--
> > 1 file changed, 14 insertions(+), 2 deletions(-)
> >
> > 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 b19644ed12e0..d2b61ab950d4 100644
> > --- a/drivers/platform/x86/hp/hp-bioscfg/order-list-attributes.c
> > +++ b/drivers/platform/x86/hp/hp-bioscfg/order-list-attributes.c
> > @@ -152,7 +152,7 @@ static int hp_populate_ordered_list_elements_from_package(union acpi_object *ord
> >
> > switch (order_obj[elem].type) {
> > case ACPI_TYPE_STRING:
> > - if (elem != PREREQUISITES && elem != ORD_LIST_ELEMENTS) {
> > + if (elem != PREREQUISITES) {
> > ret = hp_convert_hexstr_to_str(order_obj[elem].string.pointer,
> > order_obj[elem].string.length,
> > &str_value, &value_len);
> > @@ -266,6 +266,15 @@ static int hp_populate_ordered_list_elements_from_package(union acpi_object *ord
> > if (ret)
> > goto exit_list;
> >
> > + /*
> > + * It is expected for the element size value
> > + * to be 1 and not to represent the actual
> > + * number of elements stored in comma
> > + * separated format. element size value is
> > + * recalculated to report the correct number
> > + * of data elements found.
> > + */
> > +
> > part_tmp = tmpstr;
> > part = strsep(&part_tmp, COMMA_SEP);
> > if (!part)
> > @@ -273,11 +282,14 @@ static int hp_populate_ordered_list_elements_from_package(union acpi_object *ord
> > tmpstr,
> > sizeof(ordered_list_data->elements[0]));
> >
> > - for (olist_elem = 1; olist_elem < MAX_ELEMENTS_SIZE && part; olist_elem++) {
> > + for (olist_elem = 0; olist_elem < MAX_ELEMENTS_SIZE && part; olist_elem++) {
> > strscpy(ordered_list_data->elements[olist_elem],
> > part,
> > sizeof(ordered_list_data->elements[olist_elem]));
> > +
> > part = strsep(&part_tmp, COMMA_SEP);
> > + if (part && ordered_list_data->elements_size < MAX_ELEMENTS_SIZE)
> > + ordered_list_data->elements_size++;
> > }
>
> I believe that you can replace the:
>
> if (part && ordered_list_data->elements_size < MAX_ELEMENTS_SIZE)
> ordered_list_data->elements_size++;
> }
>
> Lines with simply (after the loop has finished) doing:
>
> }
> ordered_list_data->elements_size = olist_elem'
>
> Or am I missing something ?
The lines cannot be replaced with a single line for several reasons,
1. elements_size is initially set to 1 and it is only incremented when
a COMMA_SEP is found. (See part variable)
2. Limit the number of element_size to MAX_ELEMENTS_SIZE. The user
requires entering all items in the new order when a change is needed.
For instance, updating boot order.
3. Limiting elements_size and not just olist_elem to to
MAX_ELEMENTS_SIZE removes the possibility of array overflow
(ordered_list_data->elements[..]). olist_elem value is 0 (zero)
based while elements_size is 1 based
>
> Regards,
>
> Hans
>
>
>
