Hi, I'm using gadgetfs on an i.MX31 platform, and I took the example from http://www.linux-usb.org/gadget/ as basis, but put all threads in one, and I use poll to identify when to read / write from / to an endpoint descriptor. Then, after I get USB_REQ_SET_CONFIGURATION I open bulk-in and -out endpoints, on the next poll I add the bulk-out endpoint to the poll array, get a POLLIN event, do a read(), and it blocks. Here is an excerpt from strace output: poll([{fd=3, events=POLLIN|POLLHUP, revents=POLLIN}], 1, -1) = 1 read(3, "\x00\x09\x03\x00\x00\x00\x00\x00\x03\x00\x00\x00", 60) = 12 write(2, "SETUP 00.09 v0003 i0000 0\n", 26) = 26 write(2, "CONFIG #3\n", 10) = 10 write(2, "Start bulk EPs\n", 15) = 15 open("ep1in", O_RDWR) = 4 write(4, "\x01\x00\x00\x00\x07\x05\x81\x02\x40\x00\x00\x07\x05\x81\x02\x40\x00\x00", 18) = 18 write(2, "ep1in start fd 4\n", 17) = 17 open("ep1out", O_RDWR) = 5 write(5, "\x01\x00\x00\x00\x07\x05\x01\x02\x40\x00\x00\x07\x05\x01\x02\x40\x00\x00", 18) = 18 write(2, "ep1out start fd 5\n", 18) = 18 read(3, "", 0) = 0 write(2, "(1): 2 descriptors: 3, 5\n", 25) = 25 poll([{fd=3, events=POLLIN|POLLHUP}, {fd=5, events=POLLIN|POLLHUP, revents=POLLIN}], 2, -1) = 1 read(5, This looks to me like a bug in gadgetfs, or am I doing anything wrong? Or can it be a bug in i.MX31 gadget driver? Thanks Guennadi --- Guennadi Liakhovetski, Ph.D. Freelance Open-Source Software Developer -- 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
