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USB wireless adapter plug out causes a complete system hang/freeze

kaiyu zhang
Prodigy 230 points

Hi, All
We've been using a USB wireless adapter (EdiMax), which contains a Ralink 7711 chip inside. Everything works well , until we  plug out the adapter while it is in use. The whole system went into a total freeze and could not be used any more unless we hot reset the board.
We've been testing this scenario on a TI8168 EVM and with SDK 5.05.01.04.
At first we think this might be a driver issue. And we further tested this scenario on a PC, with the same kernel and driver. But the same scenario did not present itself, which leads us to consider the possibility of SDK USB host driver issue.

We want to check if TI has any USB related bug fixes since SDK 5.05.01.04. Or did anyone ever encounter the same issue?

Thank you all.

  • 0
    TI__Guru**** 170625 points

    Hello,

    These are the available patches for the Linux kernel:

    http://arago-project.org/git/projects/?p=linux-omap3.git;a=shortlog;h=refs/heads/ti81xx-master

    And these are the related to USB patches:

    http://arago-project.org/git/projects/?p=linux-omap3.git&a=search&h=refs%2Fheads%2Fmaster&st=commit&s=usb

    You can check if you have them all, and if some of these will fix the issue (in case it is not in your current PSP)

    Regards,

    Pavel

  • 0 in reply to Pavel Botev
    Prodigy 230 points

    Thank you Pavel. I followed your suggestion and downloaded the latest kernel from TI website, and checked all USB patches you mentioned are patched into the source.

    But, unfortunately, the latest kernel does not resolve the problem.

    In one of your early posts( http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/717/t/235463.aspx),   mentioned TI has tested the gadget " DWA-125 Wireless 150 USB Adapter" on DM8168, but the same issue with it, as from our test result.