From c54dcf499b62ae48c5b8322f3ea9714ebd4d1108 Mon Sep 17 00:00:00 2001 From: Angel Pons Date: Fri, 30 Aug 2019 22:14:18 +0200 Subject: soc/skylake: prevent null pointer dereferences Change-Id: Ide10223e7fc37a6c4bfa408234ef3efe1846236a Signed-off-by: Angel Pons Reviewed-on: https://review.coreboot.org/c/coreboot/+/35173 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi --- src/soc/intel/skylake/chip.c | 22 ++++++++++------------ src/soc/intel/skylake/chip_fsp20.c | 17 +++++++++-------- 2 files changed, 19 insertions(+), 20 deletions(-) (limited to 'src/soc') diff --git a/src/soc/intel/skylake/chip.c b/src/soc/intel/skylake/chip.c index a7d58720a5..212c24467e 100644 --- a/src/soc/intel/skylake/chip.c +++ b/src/soc/intel/skylake/chip.c @@ -153,10 +153,7 @@ void soc_silicon_init_params(SILICON_INIT_UPD *params) /* Enable ISH if device is on */ dev = pcidev_path_on_root(PCH_DEVFN_ISH); - if (dev) - params->IshEnable = dev->enabled; - else - params->IshEnable = 0; + params->IshEnable = dev ? dev->enabled : 0; params->EnableAzalia = config->EnableAzalia; params->IoBufferOwnership = config->IoBufferOwnership; @@ -210,23 +207,24 @@ void soc_silicon_init_params(SILICON_INIT_UPD *params) * do the changes and then lock it back in coreboot * */ - if (config->HeciEnabled == 0) - params->PsfUnlock = 1; - else - params->PsfUnlock = 0; + params->PsfUnlock = !config->HeciEnabled; for (i = 0; i < ARRAY_SIZE(config->domain_vr_config); i++) fill_vr_domain_config(params, i, &config->domain_vr_config[i]); /* Show SPI controller if enabled in devicetree.cb */ dev = pcidev_path_on_root(PCH_DEVFN_SPI); - params->ShowSpiController = dev->enabled; + params->ShowSpiController = dev ? dev->enabled : 0; /* Enable xDCI controller if enabled in devicetree and allowed */ dev = pcidev_path_on_root(PCH_DEVFN_USBOTG); - if (!xdci_can_enable()) - dev->enabled = 0; - params->XdciEnable = dev->enabled; + if (dev) { + if (!xdci_can_enable()) + dev->enabled = 0; + params->XdciEnable = dev->enabled; + } else { + params->XdciEnable = 0; + } params->SendVrMbxCmd = config->SendVrMbxCmd; diff --git a/src/soc/intel/skylake/chip_fsp20.c b/src/soc/intel/skylake/chip_fsp20.c index 85d3edf330..e9c37d67c9 100644 --- a/src/soc/intel/skylake/chip_fsp20.c +++ b/src/soc/intel/skylake/chip_fsp20.c @@ -354,10 +354,7 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd) /* If ISH is enabled, enable ISH elements */ dev = pcidev_path_on_root(PCH_DEVFN_ISH); - if (dev) - params->PchIshEnable = dev->enabled; - else - params->PchIshEnable = 0; + params->PchIshEnable = dev ? dev->enabled : 0; params->PchHdaEnable = config->EnableAzalia; params->PchHdaIoBufferOwnership = config->IoBufferOwnership; @@ -433,13 +430,17 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd) /* Show SPI controller if enabled in devicetree.cb */ dev = pcidev_path_on_root(PCH_DEVFN_SPI); - params->ShowSpiController = dev->enabled; + params->ShowSpiController = dev ? dev->enabled : 0; /* Enable xDCI controller if enabled in devicetree and allowed */ dev = pcidev_path_on_root(PCH_DEVFN_USBOTG); - if (!xdci_can_enable()) - dev->enabled = 0; - params->XdciEnable = dev->enabled; + if (dev) { + if (!xdci_can_enable()) + dev->enabled = 0; + params->XdciEnable = dev->enabled; + } else { + params->XdciEnable = 0; + } /* Enable or disable Gaussian Mixture Model in devicetree */ dev = pcidev_path_on_root(SA_DEVFN_GMM); -- cgit v1.2.3