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Subject[PATCH char-misc-next v2 6/8] misc: mic: add threaded irq support in card driver
Date
From: Siva Yerramreddy <yshivakrishna@gmail.com>

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>
---
drivers/misc/mic/card/mic_device.c | 23 +++++++++++++----------
drivers/misc/mic/card/mic_device.h | 5 +++--
drivers/misc/mic/card/mic_virtio.c | 7 ++++---
3 files changed, 20 insertions(+), 15 deletions(-)

diff --git a/drivers/misc/mic/card/mic_device.c b/drivers/misc/mic/card/mic_device.c
index d0980ff..83819ee 100644
--- a/drivers/misc/mic/card/mic_device.c
+++ b/drivers/misc/mic/card/mic_device.c
@@ -83,8 +83,8 @@ 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", mdrv, shutdown_db);
+ shutdown_cookie = mic_request_card_irq(mic_shutdown_isr, NULL,
+ "Shutdown", mdrv, shutdown_db);
if (IS_ERR(shutdown_cookie))
rc = PTR_ERR(shutdown_cookie);
else
@@ -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 @@ err:
/**
* 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.
*/
diff --git a/drivers/misc/mic/card/mic_device.h b/drivers/misc/mic/card/mic_device.h
index 306f502..e12a0c2 100644
--- a/drivers/misc/mic/card/mic_device.h
+++ b/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);
diff --git a/drivers/misc/mic/card/mic_virtio.c b/drivers/misc/mic/card/mic_virtio.c
index 653799b..f14b600 100644
--- a/drivers/misc/mic/card/mic_virtio.c
+++ b/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;
--
1.8.2.1


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