On Thu, Oct 31, 2013 at 11:56 AM, Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > On Thu, Oct 31, 2013 at 11:24:05AM -0400, Cliff Brake wrote: > > I'd focus on the host controller driver, it would be the one that is > probably the issue (you can test this with a PC running Linux and a > different host controller.) Thanks for the suggestion. > USB transfers cause irqs to be disabled during the callbacks, that's the > way the stack is written (people are slowly working on resolving this.) > Does holding interrupts off for that long cause problems for you? Yes, its an embedded application where a serial port is receiving data at 1.5Mbit. So when the kernel gets locked, it appears the 64-byte serial fifo's are overflowing. > If > so, perhaps you should change hardware platforms? (not to a rpi, those > are _way_ worse for USB...) > :-) With 1000's of units in the field, I guess we'll work on a fix ... Thanks, Cliff -- 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
