Bug 85071

Summary:	mwifiex_usb_submit_rx_urb: dev_alloc_skb failed during throughput iperf teste when conected to 5GHz
Product:	Drivers	Reporter:	Marek Belisko (marek.belisko)
Component:	network-wireless	Assignee:	drivers_network-wireless (drivers_network-wireless)
Status:	NEW ---
Severity:	blocking	CC:	gbhat, linville, patila, reyad.attiyat
Priority:	P1
Hardware:	ARM
OS:	Linux
Kernel Version:	3.9	Subsystem:
Regression:	No	Bisected commit-id:

Description Marek Belisko 2014-09-23 21:33:05 UTC

Doing some throughput testing (with iperf) in 5GHz I got following failures:
[ 221.521799] usb 1-1: mwifiex_usb_submit_rx_urb: dev_alloc_skb failed

and after then card is unusable only reboot helps.

I checked which which size fails to allocate and it's 4096 bytes. I
was looking to changes in never kernel releases but I cannot find
anything obvious (also tried backports v3.16 but issue is still there). When connected to 2.4GHz I can reproduce issue with iperf but must also ping wifi deviceh. I'm using FW version mwifiex 1.0 (14.68.29.p26).

On device with usb wifi I'm running iperf server: iperf -s -u -i1
on other device run: iperf -c IPADDR -u -b 100m

Marek

Comment 1 Ganapathi Bhat 2018-11-25 07:31:15 UTC

Hi Marek,

Do you still see this issue?

Thanks,
Ganapathi