1 files changed, 55 insertions, 56 deletions

diff --git a/drivers/bluetooth/btmrvl_sdio.c b/drivers/bluetooth/btmrvl_sdio.c
index df0773ebd9e4..dcc2a6ec23f0 100644
--- a/drivers/bluetooth/btmrvl_sdio.c
+++ b/drivers/bluetooth/btmrvl_sdio.c
@@ -47,6 +47,7 @@
  * module_exit function is called.
  */
 static u8 user_rmmod;
+static u8 sdio_ireg;
 
 static const struct btmrvl_sdio_device btmrvl_sdio_sd6888 = {
 	.helper		= "sd8688_helper.bin",
@@ -83,10 +84,10 @@ static int btmrvl_sdio_read_fw_status(struct btmrvl_sdio_card *card, u16 *dat)
 	*dat = 0;
 
 	fws0 = sdio_readb(card->func, CARD_FW_STATUS0_REG, &ret);
+	if (ret)
+		return -EIO;
 
-	if (!ret)
-		fws1 = sdio_readb(card->func, CARD_FW_STATUS1_REG, &ret);
-
+	fws1 = sdio_readb(card->func, CARD_FW_STATUS1_REG, &ret);
 	if (ret)
 		return -EIO;
 
@@ -216,7 +217,7 @@ static int btmrvl_sdio_download_helper(struct btmrvl_sdio_card *card)
 
 	tmphlprbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
 
-	tmphlprbuf = kmalloc(tmphlprbufsz, GFP_KERNEL);
+	tmphlprbuf = kzalloc(tmphlprbufsz, GFP_KERNEL);
 	if (!tmphlprbuf) {
 		BT_ERR("Unable to allocate buffer for helper."
 			" Terminating download");
@@ -224,8 +225,6 @@ static int btmrvl_sdio_download_helper(struct btmrvl_sdio_card *card)
 		goto done;
 	}
 
-	memset(tmphlprbuf, 0, tmphlprbufsz);
-
 	helperbuf = (u8 *) ALIGN_ADDR(tmphlprbuf, BTSDIO_DMA_ALIGN);
 
 	/* Perform helper data transfer */
@@ -318,7 +317,7 @@ static int btmrvl_sdio_download_fw_w_helper(struct btmrvl_sdio_card *card)
 	BT_DBG("Downloading FW image (%d bytes)", firmwarelen);
 
 	tmpfwbufsz = ALIGN_SZ(BTM_UPLD_SIZE, BTSDIO_DMA_ALIGN);
-	tmpfwbuf = kmalloc(tmpfwbufsz, GFP_KERNEL);
+	tmpfwbuf = kzalloc(tmpfwbufsz, GFP_KERNEL);
 	if (!tmpfwbuf) {
 		BT_ERR("Unable to allocate buffer for firmware."
 		       " Terminating download");
@@ -326,8 +325,6 @@ static int btmrvl_sdio_download_fw_w_helper(struct btmrvl_sdio_card *card)
 		goto done;
 	}
 
-	memset(tmpfwbuf, 0, tmpfwbufsz);
-
 	/* Ensure aligned firmware buffer */
 	fwbuf = (u8 *) ALIGN_ADDR(tmpfwbuf, BTSDIO_DMA_ALIGN);
 
@@ -555,78 +552,79 @@ exit:
 	return ret;
 }
 
-static int btmrvl_sdio_get_int_status(struct btmrvl_private *priv, u8 * ireg)
+static int btmrvl_sdio_process_int_status(struct btmrvl_private *priv)
 {
-	int ret;
-	u8 sdio_ireg = 0;
+	ulong flags;
+	u8 ireg;
 	struct btmrvl_sdio_card *card = priv->btmrvl_dev.card;
 
-	*ireg = 0;
-
-	sdio_ireg = sdio_readb(card->func, HOST_INTSTATUS_REG, &ret);
-	if (ret) {
-		BT_ERR("sdio_readb: read int status register failed");
-		ret = -EIO;
-		goto done;
-	}
-
-	if (sdio_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("sdio_ireg = 0x%x", sdio_ireg);
-
-		sdio_writeb(card->func, ~(sdio_ireg) & (DN_LD_HOST_INT_STATUS |
-							UP_LD_HOST_INT_STATUS),
-			    HOST_INTSTATUS_REG, &ret);
-		if (ret) {
-			BT_ERR("sdio_writeb: clear int status register "
-				"failed");
-			ret = -EIO;
-			goto done;
-		}
-	}
+	spin_lock_irqsave(&priv->driver_lock, flags);
+	ireg = sdio_ireg;
+	sdio_ireg = 0;
+	spin_unlock_irqrestore(&priv->driver_lock, flags);
 
-	if (sdio_ireg & DN_LD_HOST_INT_STATUS) {
+	sdio_claim_host(card->func);
+	if (ireg & DN_LD_HOST_INT_STATUS) {
 		if (priv->btmrvl_dev.tx_dnld_rdy)
 			BT_DBG("tx_done already received: "
-				" int_status=0x%x", sdio_ireg);
+				" int_status=0x%x", ireg);
 		else
 			priv->btmrvl_dev.tx_dnld_rdy = true;
 	}
 
-	if (sdio_ireg & UP_LD_HOST_INT_STATUS)
+	if (ireg & UP_LD_HOST_INT_STATUS)
 		btmrvl_sdio_card_to_host(priv);
 
-	*ireg = sdio_ireg;
-
-	ret = 0;
+	sdio_release_host(card->func);
 
-done:
-	return ret;
+	return 0;
 }
 
 static void btmrvl_sdio_interrupt(struct sdio_func *func)
 {
 	struct btmrvl_private *priv;
-	struct hci_dev *hcidev;
 	struct btmrvl_sdio_card *card;
+	ulong flags;
 	u8 ireg = 0;
+	int ret;
 
 	card = sdio_get_drvdata(func);
-	if (card && card->priv) {
-		priv = card->priv;
-		hcidev = priv->btmrvl_dev.hcidev;
+	if (!card || !card->priv) {
+		BT_ERR("sbi_interrupt(%p) card or priv is "
+				"NULL, card=%p\n", func, card);
+		return;
+	}
 
-		if (btmrvl_sdio_get_int_status(priv, &ireg))
-			BT_ERR("reading HOST_INT_STATUS_REG failed");
-		else
-			BT_DBG("HOST_INT_STATUS_REG %#x", ireg);
+	priv = card->priv;
+
+	ireg = sdio_readb(card->func, HOST_INTSTATUS_REG, &ret);
+	if (ret) {
+		BT_ERR("sdio_readb: read int status register failed");
+		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);
 
-		btmrvl_interrupt(priv);
+		sdio_writeb(card->func, ~(ireg) & (DN_LD_HOST_INT_STATUS |
+					UP_LD_HOST_INT_STATUS),
+				HOST_INTSTATUS_REG, &ret);
+		if (ret) {
+			BT_ERR("sdio_writeb: clear int status register failed");
+			return;
+		}
 	}
+
+	spin_lock_irqsave(&priv->driver_lock, flags);
+	sdio_ireg |= ireg;
+	spin_unlock_irqrestore(&priv->driver_lock, flags);
+
+	btmrvl_interrupt(priv);
 }
 
 static int btmrvl_sdio_register_dev(struct btmrvl_sdio_card *card)
@@ -930,6 +928,7 @@ static int btmrvl_sdio_probe(struct sdio_func *func,
 	/* Initialize the interface specific function pointers */
 	priv->hw_host_to_card = btmrvl_sdio_host_to_card;
 	priv->hw_wakeup_firmware = btmrvl_sdio_wakeup_fw;
+	priv->hw_process_int_status = btmrvl_sdio_process_int_status;
 
 	if (btmrvl_register_hdev(priv)) {
 		BT_ERR("Register hdev failed!");