On Mon, Oct 17, 2011 at 03:31:02PM +0530, Amit Nagal wrote:

Hi ,

While going through a few usb drivers code , i observed that the drivers maintain a ring buffer which stores data coming from usb device in interrupt context . Also these ring buffers is a power of 2 size

i am looking for reasons how to compute the the max size of these ring buffers , so that no overflow situation happens . What factors should always be accounted while computing the max size of these ring buffers .

Test your device, and your driver, with different values and determine what is the best size. It's not that hard to do. greg k-h