mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-10-29 23:53:32 +00:00
Code Issues Releases Wiki Activity

PCI: designware: Remove incorrect RC memory base/limit configuration

Browse source 
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>
This commit is contained in:
Gabriele Paoloni 2016-04-16 12:03:39 +01:00 committed by Bjorn Helgaas
parent 7e57fd1444
commit a5cb903aef
1 changed files with 0 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
drivers/pci/host/pcie-designware.c
View file

@ -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;