lkml.org 
[lkml]   [2014]   [Jun]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 3.14 019/110] USB: EHCI: avoid BIOS handover on the HASEE E200
    Date
    3.14-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Alan Stern <stern@rowland.harvard.edu>

    commit b0a50e92bda3c4aeb8017d4e6c6e92146ebd5c9b upstream.

    Leandro Liptak reports that his HASEE E200 computer hangs when we ask
    the BIOS to hand over control of the EHCI host controller. This
    definitely sounds like a bug in the BIOS, but at the moment there is
    no way to fix it.

    This patch works around the problem by avoiding the handoff whenever
    the motherboard and BIOS version match those of Leandro's computer.

    Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
    Reported-by: Leandro Liptak <leandroliptak@gmail.com>
    Tested-by: Leandro Liptak <leandroliptak@gmail.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/usb/host/pci-quirks.c | 19 ++++++++++++++++---
    1 file changed, 16 insertions(+), 3 deletions(-)

    --- a/drivers/usb/host/pci-quirks.c
    +++ b/drivers/usb/host/pci-quirks.c
    @@ -656,6 +656,14 @@ static const struct dmi_system_id ehci_d
    DMI_MATCH(DMI_BIOS_VERSION, "Lucid-"),
    },
    },
    + {
    + /* HASEE E200 */
    + .matches = {
    + DMI_MATCH(DMI_BOARD_VENDOR, "HASEE"),
    + DMI_MATCH(DMI_BOARD_NAME, "E210"),
    + DMI_MATCH(DMI_BIOS_VERSION, "6.00"),
    + },
    + },
    { }
    };

    @@ -665,9 +673,14 @@ static void ehci_bios_handoff(struct pci
    {
    int try_handoff = 1, tried_handoff = 0;

    - /* The Pegatron Lucid tablet sporadically waits for 98 seconds trying
    - * the handoff on its unused controller. Skip it. */
    - if (pdev->vendor == 0x8086 && pdev->device == 0x283a) {
    + /*
    + * The Pegatron Lucid tablet sporadically waits for 98 seconds trying
    + * the handoff on its unused controller. Skip it.
    + *
    + * The HASEE E200 hangs when the semaphore is set (bugzilla #77021).
    + */
    + if (pdev->vendor == 0x8086 && (pdev->device == 0x283a ||
    + pdev->device == 0x27cc)) {
    if (dmi_check_system(ehci_dmi_nohandoff_table))
    try_handoff = 0;
    }



    \
     
     \ /
      Last update: 2014-06-28 22:21    [W:4.113 / U:0.008 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site