soc/intel: Replace uses of dev_find_slot()

To call dev_find_slot(0, xx) in romstage can produce
invalid results since PCI bus enumeration has not
been progressed yet.

Replace this with method that relies on bus topology
that walks the root bus only.

Change-Id: I2883610059bb9fa860bba01179e7d5c58cae00e5
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33996
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/soc/intel/cannonlake/acpi.c b/src/soc/intel/cannonlake/acpi.c
index ff9da451c8..26c28472e1 100644
--- a/src/soc/intel/cannonlake/acpi.c
+++ b/src/soc/intel/cannonlake/acpi.c
@@ -293,7 +293,7 @@ int acpigen_soc_clear_tx_gpio(unsigned int gpio_num)
 
 static unsigned long soc_fill_dmar(unsigned long current)
 {
-	struct device *const igfx_dev = dev_find_slot(0, SA_DEVFN_IGD);
+	struct device *const igfx_dev = pcidev_path_on_root(SA_DEVFN_IGD);
 	uint64_t gfxvtbar = MCHBAR64(GFXVTBAR) & VTBAR_MASK;
 	bool gfxvten = MCHBAR32(GFXVTBAR) & VTBAR_ENABLED;
 
@@ -306,7 +306,7 @@ static unsigned long soc_fill_dmar(unsigned long current)
 		acpi_dmar_drhd_fixup(tmp, current);
 	}
 
-	struct device *const ipu_dev = dev_find_slot(0, SA_DEVFN_IPU);
+	struct device *const ipu_dev = pcidev_path_on_root(SA_DEVFN_IPU);
 	uint64_t ipuvtbar = MCHBAR64(IPUVTBAR) & VTBAR_MASK;
 	bool ipuvten = MCHBAR32(IPUVTBAR) & VTBAR_ENABLED;