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-rw-r--r--drivers/uio/uio.c14
-rw-r--r--include/linux/uio_driver.h2
2 files changed, 8 insertions, 8 deletions
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index 8132288920b2..0fd2cda74244 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -512,7 +512,7 @@ static unsigned int uio_poll(struct file *filep, poll_table *wait)
struct uio_listener *listener = filep->private_data;
struct uio_device *idev = listener->dev;
- if (idev->info->irq == UIO_IRQ_NONE)
+ if (!idev->info->irq)
return -EIO;
poll_wait(filep, &idev->wait, wait);
@@ -530,7 +530,7 @@ static ssize_t uio_read(struct file *filep, char __user *buf,
ssize_t retval;
s32 event_count;
- if (idev->info->irq == UIO_IRQ_NONE)
+ if (!idev->info->irq)
return -EIO;
if (count != sizeof(s32))
@@ -578,7 +578,7 @@ static ssize_t uio_write(struct file *filep, const char __user *buf,
ssize_t retval;
s32 irq_on;
- if (idev->info->irq == UIO_IRQ_NONE)
+ if (!idev->info->irq)
return -EIO;
if (count != sizeof(s32))
@@ -825,9 +825,9 @@ int __uio_register_device(struct module *owner,
info->uio_dev = idev;
- if (idev->info->irq >= 0) {
- ret = request_irq(idev->info->irq, uio_interrupt,
- idev->info->irq_flags, idev->info->name, idev);
+ if (info->irq && (info->irq != UIO_IRQ_CUSTOM)) {
+ ret = request_irq(info->irq, uio_interrupt,
+ info->irq_flags, info->name, idev);
if (ret)
goto err_request_irq;
}
@@ -863,7 +863,7 @@ void uio_unregister_device(struct uio_info *info)
uio_free_minor(idev);
- if (info->irq >= 0)
+ if (info->irq && (info->irq != UIO_IRQ_CUSTOM))
free_irq(info->irq, idev);
uio_dev_del_attributes(idev);
diff --git a/include/linux/uio_driver.h b/include/linux/uio_driver.h
index 5dcc9ff72f69..d6188e5a52df 100644
--- a/include/linux/uio_driver.h
+++ b/include/linux/uio_driver.h
@@ -108,7 +108,7 @@ extern void uio_event_notify(struct uio_info *info);
/* defines for uio_info->irq */
#define UIO_IRQ_CUSTOM -1
-#define UIO_IRQ_NONE -2
+#define UIO_IRQ_NONE 0
/* defines for uio_mem->memtype */
#define UIO_MEM_NONE 0