diff mbox series

[v3,1/3] wifi: mt76: mt7921: fix country count limitation for CLC

Message ID 20231120123940.5788-2-mingyen.hsieh@mediatek.com
State Superseded
Headers show
Series wifi: mt76: mt7921: series with CLC patches | expand

Commit Message

Mingyen Hsieh Nov. 20, 2023, 12:39 p.m. UTC 
From: Ming Yen Hsieh <mingyen.hsieh@mediatek.com>

Due to the increase in the number of power tables on CLC, the variable
nr_country is no longer sufficient to represent the total quantity.
Therefore, we have switched to calculating the length of clc buf to
obtain the correct power table. Additionally, the version number has
been incremented to 1.

Fixes: 23bdc5d8cadf ("wifi: mt76: mt7921: introduce Country Location Control support")
Signed-off-by: Ming Yen Hsieh <mingyen.hsieh@mediatek.com>

v2:
  - Convert type of buf_len from "__le16" to "u16".

---
 drivers/net/wireless/mediatek/mt76/mt7921/mcu.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

Comments

Kalle Valo Nov. 21, 2023, 12:48 p.m. UTC | #1 
Mingyen Hsieh <mingyen.hsieh@mediatek.com> writes:

> From: Ming Yen Hsieh <mingyen.hsieh@mediatek.com>
>
> Due to the increase in the number of power tables on CLC, the variable
> nr_country is no longer sufficient to represent the total quantity.
> Therefore, we have switched to calculating the length of clc buf to
> obtain the correct power table. Additionally, the version number has
> been incremented to 1.
>
> Fixes: 23bdc5d8cadf ("wifi: mt76: mt7921: introduce Country Location Control support")
> Signed-off-by: Ming Yen Hsieh <mingyen.hsieh@mediatek.com>
>
> v2:
>   - Convert type of buf_len from "__le16" to "u16".

Like in v2 this should be after "---" line.
diff mbox series

Patch

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
index 753a4fc45c70..36ac004e1ec9 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
@@ -1264,6 +1264,7 @@  int __mt7921_mcu_set_clc(struct mt792x_dev *dev, u8 *alpha2,
 		u8 mtcl_conf;
 		u8 rsvd[62];
 	} __packed req = {
+		.ver = 1,
 		.idx = idx,
 		.env = env_cap,
 		.env_6g = dev->phy.power_type,
@@ -1271,7 +1272,8 @@  int __mt7921_mcu_set_clc(struct mt792x_dev *dev, u8 *alpha2,
 		.mtcl_conf = mt792x_acpi_get_mtcl_conf(&dev->phy, alpha2),
 	};
 	int ret, valid_cnt = 0;
-	u8 i, *pos;
+	u16 buf_len = 0;
+	u8 *pos;
 
 	if (!clc)
 		return 0;
@@ -1281,12 +1283,15 @@  int __mt7921_mcu_set_clc(struct mt792x_dev *dev, u8 *alpha2,
 	if (mt76_find_power_limits_node(&dev->mt76))
 		req.cap |= CLC_CAP_DTS_EN;
 
+	buf_len = le16_to_cpu(clc->len) - sizeof(*clc);
 	pos = clc->data;
-	for (i = 0; i < clc->nr_country; i++) {
+	while (buf_len > 16) {
 		struct mt7921_clc_rule *rule = (struct mt7921_clc_rule *)pos;
 		u16 len = le16_to_cpu(rule->len);
+		u16 offset = len + sizeof(*rule);
 
-		pos += len + sizeof(*rule);
+		pos += offset;
+		buf_len -= offset;
 		if (rule->alpha2[0] != alpha2[0] ||
 		    rule->alpha2[1] != alpha2[1])
 			continue;