[PATCH 03/10] ACPI: EC: Pass one argument to acpi_ec_query()

Rafael J. Wysocki
2021-11-23T18:49:36Z

Notice that the second argument to acpi_ec_query() is redundant,
because in the only case when it is not NULL, the value passed
through it is only checked against 0 and it can only be 0 when
acpi_ec_query() returns an error code, but its return value
is checked along with the value passed through its second
argument.

Accordingly, modify acpi_ec_query() to take only one argument
and while at it, change its handling of the case when
acpi_ec_transaction() returns an error so as to return that
error value to the caller right away.

No expected functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/acpi/ec.c | 26 ++++++++++++++------------
1 file changed, 14 insertions(+), 12 deletions(-)

Index: linux-pm/drivers/acpi/ec.c
===================================================================
--- linux-pm.orig/drivers/acpi/ec.c
+++ linux-pm/drivers/acpi/ec.c
@@ -169,7 +169,7 @@ struct acpi_ec_query {
struct acpi_ec *ec;
};

-static int acpi_ec_query(struct acpi_ec *ec, u8 *data);
+static int acpi_ec_query(struct acpi_ec *ec);
static bool advance_transaction(struct acpi_ec *ec, bool interrupt);
static void acpi_ec_event_handler(struct work_struct *work);
static void acpi_ec_event_processor(struct work_struct *work);
@@ -496,12 +496,10 @@ static inline void __acpi_ec_disable_eve
*/
static void acpi_ec_clear(struct acpi_ec *ec)
{
- int i, status;
- u8 value = 0;
+ int i;

for (i = 0; i < ACPI_EC_CLEAR_MAX; i++) {
- status = acpi_ec_query(ec, &value);
- if (status || !value)
+ if (acpi_ec_query(ec))
break;
}
if (unlikely(i == ACPI_EC_CLEAR_MAX))
@@ -1164,11 +1162,11 @@ static void acpi_ec_event_processor(stru
acpi_ec_delete_query(q);
}

-static int acpi_ec_query(struct acpi_ec *ec, u8 *data)
+static int acpi_ec_query(struct acpi_ec *ec)
{
+ struct acpi_ec_query *q;
u8 value = 0;
int result;
- struct acpi_ec_query *q;

q = acpi_ec_create_query(ec, &value);
if (!q)
@@ -1180,11 +1178,14 @@ static int acpi_ec_query(struct acpi_ec
* bit to be cleared (and thus clearing the interrupt source).
*/
result = acpi_ec_transaction(ec, &q->transaction);
- if (!value)
- result = -ENODATA;
if (result)
goto err_exit;

+ if (!value) {
+ result = -ENODATA;
+ goto err_exit;
+ }
+
q->handler = acpi_ec_get_query_handler_by_value(ec, value);
if (!q->handler) {
result = -ENODATA;
@@ -1210,8 +1211,7 @@ static int acpi_ec_query(struct acpi_ec
err_exit:
if (result)
acpi_ec_delete_query(q);
- if (data)
- *data = value;
+
return result;
}

@@ -1243,7 +1243,9 @@ static void acpi_ec_event_handler(struct
spin_lock_irqsave(&ec->lock, flags);
while (ec->nr_pending_queries) {
spin_unlock_irqrestore(&ec->lock, flags);
- (void)acpi_ec_query(ec, NULL);
+
+ acpi_ec_query(ec);
+
spin_lock_irqsave(&ec->lock, flags);
ec->nr_pending_queries--;
/*