If we're an agent/end-point or fsl_add_bridge doesn't succeed due to some
resource failure we should not scan the PCI bus. We change fsl_add_bridge()
to return -ENODEV in the case we're an agent/end-point.
Signed-off-by: Jia Hongtao <b38...@freescale.com>
Signed-off-by: Li Yang <le...@freescale.com>
---
arch/powerpc/sysdev/fsl_pci.c | 23 ++++++++++++++---------
1 files changed, 14 insertions(+), 9 deletions(-)
diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c
index 4d4536f..11c1e23 100644
--- a/arch/powerpc/sysdev/fsl_pci.c
+++ b/arch/powerpc/sysdev/fsl_pci.c
@@ -370,7 +370,7 @@ int __init fsl_add_bridge(struct device_node *dev, int
is_primary)
iounmap(hose->cfg_data);
iounmap(hose->cfg_addr);
pcibios_free_controller(hose);
- return 0;
+ return -ENODEV;
}
setup_pci_cmd(hose);
@@ -418,6 +418,8 @@ void fsl_pci_setup(int primary_phb_addr)
{
struct device_node *np;
struct pci_controller *hose;
+ int ret;
+ int has_host = 0;
dma_addr_t min_dma_addr = 0xffffffff;
for_each_node_by_type(np, "pci") {
@@ -425,14 +427,17 @@ void fsl_pci_setup(int primary_phb_addr)
struct resource rsrc;
of_address_to_resource(np, 0, &rsrc);
if ((rsrc.start & 0xfffff) == primary_phb_addr)
- fsl_add_bridge(np, 1);
+ ret = fsl_add_bridge(np, 1);
else
- fsl_add_bridge(np, 0);
-
- hose = pci_find_hose_for_OF_device(np);
- min_dma_addr = min(min_dma_addr,
- hose->dma_window_base_cur
- + hose->dma_window_size);
+ ret = fsl_add_bridge(np, 0);
+
+ if (ret == 0) {
+ has_host = 1;
+ hose = pci_find_hose_for_OF_device(np);
+ min_dma_addr = min(min_dma_addr,
+ hose->dma_window_base_cur
+ + hose->dma_window_size);
+ }
}
}
@@ -442,7 +447,7 @@ void fsl_pci_setup(int primary_phb_addr)
* if we couldn't map all of DRAM via the dma windows we need SWIOTLB
* to handle buffers located outside of dma capable memory region
*/
- if (memblock_end_of_DRAM() > min_dma_addr) {
+ if (has_host && memblock_end_of_DRAM() > min_dma_addr) {
ppc_swiotlb_enable = 1;
set_pci_dma_ops(&swiotlb_dma_ops);
ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
--
1.7.5.1
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