Add an ioctl callback to the UIO device class.
This can be useful when status and data are needed after an interrupt
occurs.
Changes :
- Add an uio_ioctl method
- Add en ioctl entry in uio_info
Neil Armstrong <narmstrong@xxxxxxxxxxx>
Index: drivers/uio/uio.c
===================================================================
--- drivers/uio/uio.c (revision 80)
+++ drivers/uio/uio.c (working copy)
@@ -378,6 +378,17 @@
return 0;
}
+static int uio_ioctl(struct inode *inode, struct file *filep, unsigned
int cmd, unsigned long arg)
+{
+ struct uio_listener *listener = filep->private_data;
+ struct uio_device *idev = listener->dev;
+
+ if (idev->info->ioctl)
+ return idev->info->ioctl(idev->info, cmd, arg);
+
+ return -ENOSYS;
+}
+
static ssize_t uio_read(struct file *filep, char __user *buf,
size_t count, loff_t *ppos)
{
@@ -575,6 +586,7 @@
.mmap = uio_mmap,
.poll = uio_poll,
.fasync = uio_fasync,
+ .ioctl = uio_ioctl,
};
static int uio_major_init(void)
Index: include/linux/uio_driver.h
===================================================================
--- include/linux/uio_driver.h (revision 80)
+++ include/linux/uio_driver.h (working copy)
@@ -68,6 +68,7 @@
int (*open)(struct uio_info *info, struct inode *inode);
int (*release)(struct uio_info *info, struct inode *inode);
int (*irqcontrol)(struct uio_info *info, s32 irq_on);
+ int (*ioctl)(struct uio_info *info, unsigned int cmd, unsigned long
arg);
};
extern int __must_check
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