Alan Stern wrote:
On Thu, 11 Jun 2009, jack craig wrote:
...
[ 300.214387] usb 3-2: opened by process 1920: obdscan
my question is, seeing the regular pattern of 'actual_length=0', i am guessing that is normal?
Yes. The usbfs_snoop code could stand to be improved. It prints out
all the data when the URB is first submitted and then again when the
URB completes. Of course actual_length is 0 during submission. In
addition, there's no reason to dump the data buffer during submissions
for an IN transfer or during completion for an OUT transfer.
Alan Stern
Thx Alan,
I suspected it was this kind of thing, but its so much better to be sure.
by the way, my fledgling status is confirmed.
1. usbfs != sysfs (from my query yesterday)
2. i found the hard coded error message in devio.c
and see it was from that and not a usbfs daemon participating in dmesg's dump.
oh well, even the guru's had to start somewhere, ... :\
Thx for the truth, jackc...
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