misc: mic: add threaded irq support in card driver

Add threaded irq support in mic_request_card_irq which will be used
for virtual devices added on mic bus.
Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Reviewed-by: Nikhil Rao <nikhil.rao@intel.com>
Reviewed-by: Sudeep Dutt <sudeep.dutt@intel.com>
Signed-off-by: Siva Yerramreddy <yshivakrishna@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/mic/card/mic_device.c

@@ -83,7 +83,7 @@ static int mic_shutdown_init(void)
 	int shutdown_db;
 
 	shutdown_db = mic_next_card_db();
-	shutdown_cookie = mic_request_card_irq(mic_shutdown_isr,
+	shutdown_cookie = mic_request_card_irq(mic_shutdown_isr, NULL,
 					       "Shutdown", mdrv, shutdown_db);
 	if (IS_ERR(shutdown_cookie))
 		rc = PTR_ERR(shutdown_cookie);
@@ -136,7 +136,8 @@ static void mic_dp_uninit(void)
 /**
  * mic_request_card_irq - request an irq.
  *
- * @func: The callback function that handles the interrupt.
+ * @handler: interrupt handler passed to request_threaded_irq.
+ * @thread_fn: thread fn. passed to request_threaded_irq.
  * @name: The ASCII name of the callee requesting the irq.
  * @data: private data that is returned back when calling the
  * function handler.
@@ -149,17 +150,19 @@ static void mic_dp_uninit(void)
  * error code.
  *
  */
-struct mic_irq *mic_request_card_irq(irqreturn_t (*func)(int irq, void *data),
-	const char *name, void *data, int index)
+struct mic_irq *
+mic_request_card_irq(irq_handler_t handler,
+		     irq_handler_t thread_fn, const char *name,
+		     void *data, int index)
 {
 	int rc = 0;
 	unsigned long cookie;
 	struct mic_driver *mdrv = g_drv;
 
-	rc  = request_irq(mic_db_to_irq(mdrv, index), func,
-		0, name, data);
+	rc  = request_threaded_irq(mic_db_to_irq(mdrv, index), handler,
+				   thread_fn, 0, name, data);
 	if (rc) {
-		dev_err(mdrv->dev, "request_irq failed rc = %d\n", rc);
+		dev_err(mdrv->dev, "request_threaded_irq failed rc = %d\n", rc);
 		goto err;
 	}
 	mdrv->irq_info.irq_usage_count[index]++;
@@ -172,9 +175,9 @@ struct mic_irq *mic_request_card_irq(irqreturn_t (*func)(int irq, void *data),
 /**
  * mic_free_card_irq - free irq.
  *
- * @cookie: cookie obtained during a successful call to mic_request_irq
+ * @cookie: cookie obtained during a successful call to mic_request_threaded_irq
  * @data: private data specified by the calling function during the
- * mic_request_irq
+ * mic_request_threaded_irq
  *
  * returns: none.
  */

drivers/misc/mic/card/mic_device.h

@@ -30,6 +30,7 @@
 #include <linux/workqueue.h>
 #include <linux/io.h>
 #include <linux/irqreturn.h>
+#include <linux/interrupt.h>
 
 /**
  * struct mic_intr_info - Contains h/w specific interrupt sources info
@@ -116,8 +117,8 @@ mic_mmio_write(struct mic_mw *mw, u32 val, u32 offset)
 int mic_driver_init(struct mic_driver *mdrv);
 void mic_driver_uninit(struct mic_driver *mdrv);
 int mic_next_card_db(void);
-struct mic_irq *mic_request_card_irq(irqreturn_t (*func)(int irq, void *data),
-	const char *name, void *data, int intr_src);
+struct mic_irq *mic_request_card_irq(irq_handler_t handler,
+	irq_handler_t thread_fn, const char *name, void *data, int intr_src);
 void mic_free_card_irq(struct mic_irq *cookie, void *data);
 u32 mic_read_spad(struct mic_device *mdev, unsigned int idx);
 void mic_send_intr(struct mic_device *mdev, int doorbell);

drivers/misc/mic/card/mic_virtio.c

@@ -417,7 +417,7 @@ static int mic_add_device(struct mic_device_desc __iomem *d,
 
 	virtio_db = mic_next_card_db();
 	mvdev->virtio_cookie = mic_request_card_irq(mic_virtio_intr_handler,
-			"virtio intr", mvdev, virtio_db);
+			NULL, "virtio intr", mvdev, virtio_db);
 	if (IS_ERR(mvdev->virtio_cookie)) {
 		ret = PTR_ERR(mvdev->virtio_cookie);
 		goto kfree;
@@ -606,8 +606,9 @@ int mic_devices_init(struct mic_driver *mdrv)
 	mic_scan_devices(mdrv, !REMOVE_DEVICES);
 
 	config_db = mic_next_card_db();
-	virtio_config_cookie = mic_request_card_irq(mic_extint_handler,
-			"virtio_config_intr", mdrv, config_db);
+	virtio_config_cookie = mic_request_card_irq(mic_extint_handler, NULL,
+						    "virtio_config_intr", mdrv,
+						    config_db);
 	if (IS_ERR(virtio_config_cookie)) {
 		rc = PTR_ERR(virtio_config_cookie);
 		goto exit;