This driver is using a global variable. It cannot handle more than
one device at a time. The issue has been exisying since the dawn
of the driver.
Signed-off-by: Oliver Neukum <oneukum@xxxxxxxx>
Reported-by: syzbot+35f04d136fc975a70da4@xxxxxxxxxxxxxxxxxxxxxxxxx
---
drivers/usb/misc/rio500.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/misc/rio500.c b/drivers/usb/misc/rio500.c
index 13e4889bc34f..a4b6fbea975f 100644
--- a/drivers/usb/misc/rio500.c
+++ b/drivers/usb/misc/rio500.c
@@ -449,7 +449,12 @@ static int probe_rio(struct usb_interface *intf,
struct rio_usb_data *rio = &rio_instance;
int retval;
- dev_info(&intf->dev, "USB Rio found at address %d\n", dev->devnum);
+ if (rio->present) {
+ dev_info(&intf->dev, "Second USB Rio at address %d refused\n", dev->devnum);
+ return -EBUSY;
+ } else {
+ dev_info(&intf->dev, "USB Rio found at address %d\n", dev->devnum);
+ }
retval = usb_register_dev(intf, &usb_rio_class);
if (retval) {
--
2.16.4
