Messages in this thread | | | From | Sergej Pupykin <> | Subject | High CPU load and reading from usb intr bulk | Date | Fri, 16 Jun 2006 19:09:30 +0400 |
| |
Hi!
I write usb driver for embedded sh4 200MHz system (2.4.28 kernel) and added printk into rx_callback and it prints following. (this is just example)
packet 1: length=14, data=02 02 02 02 02 02 02 02 02 02 01 01 01 01 packet 2: length=10, data=02 02 02 02 02 02 02 02 02 02
while right result must be packet 1: length=14, data=01 01 01 01 01 01 01 01 01 01 01 01 01 01 packet 2: length=10, data=02 02 02 02 02 02 02 02 02 02
It seems that 2nd packet placed over 1st one. I submit single int urb and it happens often while high CPU usage.
As I understand it can not be fixed because of there is no HCI flow control between host and usb device. Am I right?
(I use usb-skeleton.c as a template)
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |