[PATCH 2/2] wifi: mt76: mt7615: release patch semaphore on timeout

[Francesco Palmarini via B4 Relay <devnull+palmarini.unive.it@kernel.org>]

From: Francesco Palmarini <palmarini@unive.it>

If the PATCH_SEM_CONTROL reply gets lost, the rom may still have granted
the semaphore and every following attempt fails with
PATCH_NOT_DL_SEM_FAIL. Release it on timeout so the next retry can get
it again.

Signed-off-by: Francesco Palmarini <palmarini@unive.it>
---
 drivers/net/wireless/mediatek/mt76/mt7615/mcu.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c
index aab4303fe..5f5e29f49 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c
@@ -1259,6 +1259,10 @@ static int mt7615_load_patch(struct mt7615_dev *dev, u32 addr, const char *name)
 		goto release_fw;
 	case PATCH_NOT_DL_SEM_SUCCESS:
 		break;
+	case -ETIMEDOUT:
+		/* rom might have granted the semaphore anyway */
+		mt76_connac_mcu_patch_sem_ctrl(&dev->mt76, false);
+		fallthrough;
 	default:
 		dev_err(dev->mt76.dev, "Failed to get patch semaphore\n");
 		ret = -EAGAIN;

-- 
2.39.5