diff options
| author | Gabriele Paoloni <gabriele.paoloni@huawei.com> | 2016-04-16 12:03:39 +0100 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2016-05-02 16:11:48 -0500 |
| commit | a5cb903aef8c642e6f0f6810d46dacedf666b54a (patch) | |
| tree | 8916cb64f4260283d7bc9cfeefc3a254b7a113ca /drivers/pci | |
| parent | 7e57fd1444bf8f4ba9179f826ed6817c56b801d4 (diff) | |
| download | linux-a5cb903aef8c642e6f0f6810d46dacedf666b54a.tar.bz2 | |
PCI: designware: Remove incorrect RC memory base/limit configuration
Currently dw_pcie_setup_rc() configures memory base and memory limit in the
type1 configuration header for the root complex. In doing so it uses the
CPU address (pp->mem_base) rather than the bus address (pp->mem_bus_addr).
This is wrong and it is useless since the configuration is overwritten
later on when pci_bus_assign_resources() is called.
Remove this configuration from dw_pcie_setup_rc().
Signed-off-by: Gabriele Paoloni <gabriele.paoloni@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Pratyush Anand <pratyush.anand@gmail.com>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/host/pcie-designware.c | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c index 261e4a1106df..aafd766546f3 100644 --- a/drivers/pci/host/pcie-designware.c +++ b/drivers/pci/host/pcie-designware.c @@ -708,8 +708,6 @@ static struct pci_ops dw_pcie_ops = { void dw_pcie_setup_rc(struct pcie_port *pp) { u32 val; - u32 membase; - u32 memlimit; /* set the number of lanes */ dw_pcie_readl_rc(pp, PCIE_PORT_LINK_CONTROL, &val); @@ -768,12 +766,6 @@ void dw_pcie_setup_rc(struct pcie_port *pp) val |= 0x00010100; dw_pcie_writel_rc(pp, val, PCI_PRIMARY_BUS); - /* setup memory base, memory limit */ - membase = ((u32)pp->mem_base & 0xfff00000) >> 16; - memlimit = (pp->mem_size + (u32)pp->mem_base) & 0xfff00000; - val = memlimit | membase; - dw_pcie_writel_rc(pp, val, PCI_MEMORY_BASE); - /* setup command register */ dw_pcie_readl_rc(pp, PCI_COMMAND, &val); val &= 0xffff0000; |