Add enable_irq() callback to struct uio_info. This callback is needed by
the uio_platform driver so interrupts can be enabled before blocking.
Signed-off-by: Magnus Damm <damm@igel.co.jp>
---
drivers/uio/uio.c | 6 ++++++
include/linux/uio_driver.h | 1 +
2 files changed, 7 insertions(+)
--- 0001/drivers/uio/uio.c
+++ work/drivers/uio/uio.c 2008-05-19 14:52:08.000000000 +0900
@@ -365,6 +365,9 @@ static unsigned int uio_poll(struct file
if (idev->info->irq == UIO_IRQ_NONE)
return -EIO;
+ if (idev->info->enable_irq)
+ idev->info->enable_irq(idev->info);
+
poll_wait(filep, &idev->wait, wait);
if (listener->event_count != atomic_read(&idev->event))
return POLLIN | POLLRDNORM;
@@ -391,6 +394,9 @@ static ssize_t uio_read(struct file *fil
do {
set_current_state(TASK_INTERRUPTIBLE);
+ if (idev->info->enable_irq)
+ idev->info->enable_irq(idev->info);
+
event_count = atomic_read(&idev->event);
if (event_count != listener->event_count) {
if (copy_to_user(buf, &event_count, count))
--- 0001/include/linux/uio_driver.h
+++ work/include/linux/uio_driver.h 2008-05-19 14:52:08.000000000 +0900
@@ -64,6 +64,7 @@ struct uio_info {
void *priv;
irqreturn_t (*handler)(int irq, struct uio_info *dev_info);
int (*mmap)(struct uio_info *info, struct vm_area_struct *vma);
+ void (*enable_irq)(struct uio_info *info);
int (*open)(struct uio_info *info, struct inode *inode);
int (*release)(struct uio_info *info, struct inode *inode);
};
--
