I want to resume the usb device on some event, so i want to check if it is suspended. I think by above method i can check if the device is already suspended, but may be i will miss to resume the device if it is suspending. Is there any way through which i can check if device is suspending?
On Thu, Mar 13, 2014 at 7:50 PM, Alan Stern <st...@rowland.harvard.edu> wrote: > On Thu, 13 Mar 2014, Jagdish Gedia wrote: > >> Hi, >> I want to check in my driver if usb device is suspended or not? > > Why do you need to check? Your driver gets told every time the device > suspends and every time it resumes. Therefore it should already know > the answer. > >> currently i am doing it like >> >> if(udev->state==USB_STATE_SUSPENDED) >> >> Is this the proper way? Is this enough? > > Aside from the fact that the device's state may change immediately > after you make this test, as Oliver pointed out, you also should > realize that this test might not give the correct answer if the device > is in the middle of suspending or resuming when the test runs. > > Alan Stern > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
