Bluetooth: btmrvl: separate write-to-clear function from interrupt handler
This patch improves readability and makes future changes easier.
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/drivers/bluetooth/btmrvl_sdio.c b/drivers/bluetooth/btmrvl_sdio.c
index 1b52c9f..7883793 100644
--- a/drivers/bluetooth/btmrvl_sdio.c
+++ b/drivers/bluetooth/btmrvl_sdio.c
@@ -667,6 +667,36 @@
return 0;
}
+static int btmrvl_sdio_write_to_clear(struct btmrvl_sdio_card *card, u8 *ireg)
+{
+ int ret;
+
+ *ireg = sdio_readb(card->func, card->reg->host_intstatus, &ret);
+ if (ret) {
+ BT_ERR("sdio_readb: read int status failed: %d", ret);
+ return ret;
+ }
+
+ if (*ireg) {
+ /*
+ * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
+ * Clear the interrupt status register and re-enable the
+ * interrupt.
+ */
+ BT_DBG("int_status = 0x%x", *ireg);
+
+ sdio_writeb(card->func, ~(*ireg) & (DN_LD_HOST_INT_STATUS |
+ UP_LD_HOST_INT_STATUS),
+ card->reg->host_intstatus, &ret);
+ if (ret) {
+ BT_ERR("sdio_writeb: clear int status failed: %d", ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
static void btmrvl_sdio_interrupt(struct sdio_func *func)
{
struct btmrvl_private *priv;
@@ -684,28 +714,9 @@
priv = card->priv;
- ireg = sdio_readb(card->func, card->reg->host_intstatus, &ret);
- if (ret) {
- BT_ERR("sdio_readb: read int status register failed");
+ ret = btmrvl_sdio_write_to_clear(card, &ireg);
+ if (ret)
return;
- }
-
- if (ireg != 0) {
- /*
- * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
- * Clear the interrupt status register and re-enable the
- * interrupt.
- */
- BT_DBG("ireg = 0x%x", ireg);
-
- sdio_writeb(card->func, ~(ireg) & (DN_LD_HOST_INT_STATUS |
- UP_LD_HOST_INT_STATUS),
- card->reg->host_intstatus, &ret);
- if (ret) {
- BT_ERR("sdio_writeb: clear int status register failed");
- return;
- }
- }
spin_lock_irqsave(&priv->driver_lock, flags);
sdio_ireg |= ireg;