From 459e7b3a133cc72fed6415dd3aca8d49f0916c1e Mon Sep 17 00:00:00 2001 From: Jon Hunter Date: Wed, 6 Jul 2022 09:39:13 +0100 Subject: [PATCH] net: stmmac: dwc-qos: Disable split header for Tegra194 [ Upstream commit 51838bcfb19ff3580e6d6c92f2917dc9239a58ab ] 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: 3e4d2632676a ("net: stmmac: Add Split Header support and enable it in XGMAC cores") Signed-off-by: Jon Hunter Link: https://lore.kernel.org/r/20220706083913.13750-1-jonathanh@nvidia.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c index dd9967aeda221..0f0094ced776b 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c @@ -357,6 +357,7 @@ static void *tegra_eqos_probe(struct platform_device *pdev, data->fix_mac_speed = tegra_eqos_fix_speed; data->init = tegra_eqos_init; data->bsp_priv = eqos; + data->sph_disable = 1; err = tegra_eqos_init(pdev, eqos); if (err < 0) -- 2.39.5