Hi All, I captured usbmon data from my USB CDC-ACM modem, and seen some behavior which I am not able to understand. Need some help.. f61f9b80 2839510516 S Co:1:007:0 s 21 22 0003 0000 0000 0 f61f9b80 2839510740 C Co:1:007:0 0 0 f61f9b80 2839510794 S Co:1:007:0 s 21 20 0000 0000 0007 7 = 80250000 000208 cd3edf80 2839510809 S Bi:1:007:1 -115 1024 < cd3ede80 2839510816 S Bi:1:007:1 -115 1024 < cd3ed580 2839510821 S Bi:1:007:1 -115 1024 < cd3ed680 2839510826 S Bi:1:007:1 -115 1024 < What does the "1024" indicates in above line, since there is no any actual data/callbacks with "1024" bytes data?? cd3ed180 2839510831 S Bi:1:007:1 -115 1024 < cd3edd80 2839510835 S Bi:1:007:1 -115 1024 < cd3ed100 2839510841 S Bi:1:007:1 -115 1024 < cd3ed280 2839510845 S Bi:1:007:1 -115 1024 < cd3edc80 2839510850 S Bi:1:007:1 -115 1024 < cd3ed600 2839510854 S Bi:1:007:1 -115 1024 < cd3edb80 2839510859 S Bi:1:007:1 -115 1024 < cd3ed980 2839510864 S Bi:1:007:1 -115 1024 < cd3ed700 2839510869 S Bi:1:007:1 -115 1024 < cd3edc00 2839510873 S Bi:1:007:1 -115 1024 < cd3ed500 2839510878 S Bi:1:007:1 -115 1024 < cd3ed080 2839510883 S Bi:1:007:1 -115 1024 < f61f9b80 2839511110 C Co:1:007:0 0 7 > cd3edf00 2839630507 C Ii:1:007:2 0:512 10 = a1200000 00000200 0300 cd3edf00 2839630519 S Ii:1:007:2 -115:512 16 < What does "16" indicates from above line.. since 10 from "10 =" in callback indicates that its a "notify_serial_state" request with 8 byte request + 2 byte data, but it doesn't actually matches to "16" from submission. cd3edf00 2839694507 C Ii:1:007:2 0:512 10 = a1200000 00000200 0200 cd3edf00 2839694526 S Ii:1:007:2 -115:512 16 < How does urb->interval "512 from above line" relates with "ept->interval" from endpoint descriptor? f61f9000 2845715548 S Co:1:007:0 s 21 22 0000 0000 0000 0 f61f9000 2845716379 C Co:1:007:0 0 0 cd3edf00 2845716475 C Ii:1:007:2 -2:512 0 Thanks for all your help. Thanks and Regards, Shivdas Gujare -- 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
