Am Samstag, 4. Dezember 2010, 00:16:12 schrieb Dmitry Torokhov: > > Since disconnect can happen at any time, we can't initialize > > struct hid_device *hid = hiddev->hid at the beginning of ioctl > > and then use it. > > > > This change checks hiddev->exist flag while holding > > the existancelock and uses hid_device only if it exists. > > Why didn't you take the lock and check hiddev->exist at the beginning of > ioctl handler instead of pushing it down into individual command > handlers? I guess it would slow down HIDIOCGVERSION but I think we could > pay this price for code that is more clear ;) Strictly speaking you'd change the semantics. Right now you can execute the ioctl even if you know you are holding an fd to a disconnected device open. Regards Oliver -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
