platform/x86: asus-wmi: Increase FAN_CURVE_BUF_LEN to 32

[ Upstream commit 5542dfc582f4a925f67bbfaf8f62ca83506032ae ]

Fix for TUF laptops returning with an -ENOSPC on calling
asus_wmi_evaluate_method_buf() when fetching default curves. The TUF method
requires at least 32 bytes space.

This also moves and changes the pr_debug() in fan_curve_check_present() to
pr_warn() in fan_curve_get_factory_default() so that there is at least some
indication in logs of why it fails.

Signed-off-by: Luke D. Jones <luke@ljones.dev>
Link: https://lore.kernel.org/r/20220828074638.5473-1-luke@ljones.dev
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 62ce198a34631d2d5c3fa4d21675261fa8a557c4..a0f31624aee97344b26d451f4bef1e8902aace07 100644 (file)
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -107,7 +107,7 @@ module_param(fnlock_default, bool, 0444);
 #define WMI_EVENT_MASK                 0xFFFF
 
 #define FAN_CURVE_POINTS               8
-#define FAN_CURVE_BUF_LEN              (FAN_CURVE_POINTS * 2)
+#define FAN_CURVE_BUF_LEN              32
 #define FAN_CURVE_DEV_CPU              0x00
 #define FAN_CURVE_DEV_GPU              0x01
 /* Mask to determine if setting temperature or percentage */
@@ -2208,8 +2208,10 @@ static int fan_curve_get_factory_default(struct asus_wmi *asus, u32 fan_dev)
        curves = &asus->custom_fan_curves[fan_idx];
        err = asus_wmi_evaluate_method_buf(asus->dsts_id, fan_dev, mode, buf,
                                           FAN_CURVE_BUF_LEN);
-       if (err)
+       if (err) {
+               pr_warn("%s (0x%08x) failed: %d\n", __func__, fan_dev, err);
                return err;
+       }
 
        fan_curve_copy_from_buf(curves, buf);
        curves->device_id = fan_dev;
@@ -2227,9 +2229,6 @@ static int fan_curve_check_present(struct asus_wmi *asus, bool *available,
 
        err = fan_curve_get_factory_default(asus, fan_dev);
        if (err) {
-               pr_debug("fan_curve_get_factory_default(0x%08x) failed: %d\n",
-                        fan_dev, err);
-               /* Don't cause probe to fail on devices without fan-curves */
                return 0;
        }