diff --git a/drivers/bluetooth/btmtksdio.c b/drivers/bluetooth/btmtksdio.c
index 491f029452ca8..8be763ab3bf49 100644
--- a/drivers/bluetooth/btmtksdio.c
+++ b/drivers/bluetooth/btmtksdio.c
@@ -92,6 +92,7 @@ MODULE_DEVICE_TABLE(sdio, btmtksdio_table);
 #define TX_EMPTY		BIT(2)
 #define TX_FIFO_OVERFLOW	BIT(8)
 #define FW_MAILBOX_INT		BIT(15)
+#define INT_MASK		GENMASK(15, 0)
 #define RX_PKT_LEN		GENMASK(31, 16)
 
 #define MTK_REG_CSICR		0xc0
@@ -565,6 +566,7 @@ static void btmtksdio_txrx_work(struct work_struct *work)
 		 * FIFO.
 		 */
 		sdio_writel(bdev->func, int_status, MTK_REG_CHISR, NULL);
+		int_status &= INT_MASK;
 
 		if ((int_status & FW_MAILBOX_INT) &&
 		    bdev->data->chipid == 0x7921) {