net: stmmac: dwc-qos: Disable split header for Tegra194

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2122226

commit 029c1c20
Author: Jon Hunter <jonathanh@nvidia.com>
Date: Wed, 6 Jul 2022 09:39:13 +0100

    There is a long-standing issue with the Synopsys DWC Ethernet driver
    for Tegra194 where random system crashes have been observed [0]. The
    problem occurs when the split header feature is enabled in the stmmac
    driver. In the bad case, a larger than expected buffer length is
    received and causes the calculation of the total buffer length to
    overflow. This results in a very large buffer length that causes the
    kernel to crash. Why this larger buffer length is received is not clear,
    however, the feedback from the NVIDIA design team is that the split
    header feature is not supported for Tegra194. Therefore, disable split
    header support for Tegra194 to prevent these random crashes from
    occurring.

    [0] https://lore.kernel.org/linux-tegra/b0b17697-f23e-8fa5-3757-604a86f3a095@nvidia.com/



    Fixes: 67afd6d1 ("net: stmmac: Add Split Header support and enable it in XGMAC cores")
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
    Link: https://lore.kernel.org/r/20220706083913.13750-1-jonathanh@nvidia.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Signed-off-by: Mark Salter <msalter@redhat.com>