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authorAlan Stern <stern@rowland.harvard.edu>2008-06-24 14:47:12 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2008-07-21 15:16:41 -0700
commit61ad04a89f0e3e6adaed0d9adfc0c9b431ccbb92 (patch)
tree7aefa64191cc2628be8c9a756b6f08bf6ff36ba0 /drivers
parentcd9f03759d3eb588e185b04e1854c778b050833e (diff)
usbfs: simplify the lookup-by-minor routines
This patch (as1105) simplifies the lookup-by-minor-number code in usbfs. Instead of passing the minor number to the callback, which must then reconstruct the entire dev_t value, the patch passes the dev_t value directly. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/usb/core/devio.c15
1 files changed, 6 insertions, 9 deletions
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index bbd029f68fa..57bedcebf96 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -550,20 +550,16 @@ static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype,
return ret;
}
-static int __match_minor(struct device *dev, void *data)
+static int match_devt(struct device *dev, void *data)
{
- int minor = *((int *)data);
-
- if (dev->devt == MKDEV(USB_DEVICE_MAJOR, minor))
- return 1;
- return 0;
+ return (dev->devt == (dev_t) data);
}
-static struct usb_device *usbdev_lookup_by_minor(int minor)
+static struct usb_device *usbdev_lookup_by_devt(dev_t devt)
{
struct device *dev;
- dev = bus_find_device(&usb_bus_type, NULL, &minor, __match_minor);
+ dev = bus_find_device(&usb_bus_type, NULL, (void *) devt, match_devt);
if (!dev)
return NULL;
put_device(dev);
@@ -589,9 +585,10 @@ static int usbdev_open(struct inode *inode, struct file *file)
goto out;
ret = -ENOENT;
+
/* usbdev device-node */
if (imajor(inode) == USB_DEVICE_MAJOR)
- dev = usbdev_lookup_by_minor(iminor(inode));
+ dev = usbdev_lookup_by_devt(inode->i_rdev);
#ifdef CONFIG_USB_DEVICEFS
/* procfs file */
if (!dev)