Re: am335x: USB DMA IRQ issue

[Felipe Balbi]

Hi,

On Thu, Feb 05, 2015 at 12:19:23PM +0100, Yegor Yefremov wrote:
> I have a problem with my am335x based board and USB.
> 
> Kernel: Linux version 3.18.1 (YegorYefremov@development1) (gcc version
> 4.9.2 (Buildroot 2015.02-git-00797-gf1b07c0) ) #1 SMP Thu Jan 15
> 15:31:27 CET 2015
> 
> I took two devices and equipped them with USB WLAN cards: Bus 001
> Device 003: ID 148f:5370 Ralink Technology, Corp. RT5370 Wireless
> Adapter. One device as AP and another as client. Client makes
> permanent ping to AP. And from time to time I start nuttcp session.
> After 2-3 days I get following errors:

2-3 days ? oh man... :-)

Here's one thing to try. Can you do some variable size pingtest ?
Something like below should do ?

random()
{
        size=$(dd if=/dev/urandom count=1 2>/dev/null|cksum|
        cut -f1 -d" "|tr '-' '\0')
        size=$(expr $size % 60000)
}

num=$1

if [ -z $num ]
then
        num=10000
fi

while ! ifconfig usb0 >/dev/null 2>&1; do
        printf "waiting for usb0\n"
        sleep 1;
done

ifconfig usb0 192.168.2.14

for i in $(seq 1 $num); do
        random
        printf "%d: \t pinging with size %-27d" $i $size
        if ! ping -c 6 192.168.2.15 -s $size -q -i 0 >/dev/null 2>&1; then
                printf "FAILED\n"
                break
        fi
        printf "PASSED\n"
done

cheers

-- 
balbi

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