Hi Tomasz
I used the patchset and added "PATCH V6 11/13 specic quirks", tested on HiSilicon D02 board but met the below problem.
[ 2.614115] [<ffffff80083b13bc>] hisi_pcie_init+0x6c/0x1ec
[ 2.619571] [<ffffff80083ab060>] pci_ecam_create+0x130/0x1ec
[ 2.625209] [<ffffff80083f3764>] pci_acpi_scan_root+0x160/0x218
[ 2.631096] [<ffffff80083d1f6c>] acpi_pci_root_add+0x36c/0x42c
[ 2.636897] [<ffffff80083ce36c>] acpi_bus_attach+0xe4/0x1a8
[ 2.642438] [<ffffff80083ce3d8>] acpi_bus_attach+0x150/0x1a8
[ 2.648066] [<ffffff80083ce3d8>] acpi_bus_attach+0x150/0x1a8
[ 2.653693] [<ffffff80083ce55c>] acpi_bus_scan+0x64/0x74
[ 2.658975] [<ffffff8008ae665c>] acpi_scan_init+0x5c/0x19c
[ 2.664429] [<ffffff8008ae6408>] acpi_init+0x280/0x2a4
[ 2.669538] [<ffffff80080829e8>] do_one_initcall+0x8c/0x19c
[ 2.675080] [<ffffff8008ac3af8>] kernel_init_freeable+0x14c/0x1ec
[ 2.681139] [<ffffff80087a8438>] kernel_init+0x10/0xfc
[ 2.686248] [<ffffff8008085e10>] ret_from_fork+0x10/0x40
In hisi_pcie_init, I used "struct acpi_device *device = ACPI_COMPANION(dev);".
I found the reason is V7 lack the below code. I added the below code, it worked ok.
[PATCH V6 01/13] pci, acpi, x86, ia64: Move ACPI host bridge device companion assignment to core code.
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -564,6 +564,11 @@ static int acpi_pci_root_add(struct acpi_device *device,
}
}
+ /*
+ * pci_create_root_bus() needs to detect the parent device type,
+ * so initialize its companion data accordingly.
+ */
+ ACPI_COMPANION_SET(&device->dev, device);
This code will be upstreamed with the "PATCH V6 11/13 specic quirks" in next time after the patchset is accepted.
Right ?
在 2016/5/10 23:19, Tomasz Nowicki 写道:
This patch provides a way to set the ACPI companion in PCI code.
We define acpi_pci_set_companion() to set the ACPI companion pointer and
call it from PCI core code. The function is stub for now.
Signed-off-by: Jayachandran C <jchandra@xxxxxxxxxxxx>
Signed-off-by: Tomasz Nowicki <tn@xxxxxxxxxxxx>
---
drivers/pci/probe.c | 2 ++
include/linux/pci-acpi.h | 4 ++++
2 files changed, 6 insertions(+)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 8004f67..fb0b752 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -12,6 +12,7 @@
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/cpumask.h>
+#include <linux/pci-acpi.h>
#include <linux/pci-aspm.h>
#include <linux/aer.h>
#include <linux/acpi.h>
@@ -2141,6 +2142,7 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
bridge->dev.parent = parent;
bridge->dev.release = pci_release_host_bridge_dev;
dev_set_name(&bridge->dev, "pci%04x:%02x", pci_domain_nr(b), bus);
+ acpi_pci_set_companion(bridge);
error = pcibios_root_bridge_prepare(bridge);
if (error) {
kfree(bridge);
diff --git a/include/linux/pci-acpi.h b/include/linux/pci-acpi.h
index 09f9f02..1baa515 100644
--- a/include/linux/pci-acpi.h
+++ b/include/linux/pci-acpi.h
@@ -111,6 +111,10 @@ static inline void acpi_pci_add_bus(struct pci_bus *bus) { }
static inline void acpi_pci_remove_bus(struct pci_bus *bus) { }
#endif /* CONFIG_ACPI */
+static inline void acpi_pci_set_companion(struct pci_host_bridge *bridge)
+{
+}
+
static inline int acpi_pci_bus_domain_nr(struct pci_bus *bus)
{
return 0;
--
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