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authorRafael J. Wysocki <rjw@sisk.pl>2010-08-21 01:57:39 +0200
committerJesse Barnes <jbarnes@virtuousgeek.org>2010-08-24 13:47:47 -0700
commit2bd50dd800b52245294cfceb56be62020cdc7515 (patch)
treeffefb8e50f9e454f332f318c415085ca2911991b /drivers/pci/pcie
parent28eb5f274a305bf3a13b2c80c4804d4515d05c64 (diff)
downloadlinux-2bd50dd800b52245294cfceb56be62020cdc7515.tar.bz2
PCI: PCIe: Disable PCIe port services during port initialization
In principle PCIe port services may be enabled by the BIOS, so it's better to disable them during port initialization to avoid spurious events from being generated. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Reviewed-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/pcie')
-rw-r--r--drivers/pci/pcie/portdrv_core.c29
1 files changed, 26 insertions, 3 deletions
diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c
index d0245c83b621..a9c222d79ebc 100644
--- a/drivers/pci/pcie/portdrv_core.c
+++ b/drivers/pci/pcie/portdrv_core.c
@@ -259,20 +259,43 @@ static int get_port_device_capability(struct pci_dev *dev)
/* Hot-Plug Capable */
if ((cap_mask & PCIE_PORT_SERVICE_HP) && (reg16 & PCI_EXP_FLAGS_SLOT)) {
pci_read_config_dword(dev, pos + PCI_EXP_SLTCAP, &reg32);
- if (reg32 & PCI_EXP_SLTCAP_HPC)
+ if (reg32 & PCI_EXP_SLTCAP_HPC) {
services |= PCIE_PORT_SERVICE_HP;
+ /*
+ * Disable hot-plug interrupts in case they have been
+ * enabled by the BIOS and the hot-plug service driver
+ * is not loaded.
+ */
+ pos += PCI_EXP_SLTCTL;
+ pci_read_config_word(dev, pos, &reg16);
+ reg16 &= ~(PCI_EXP_SLTCTL_CCIE | PCI_EXP_SLTCTL_HPIE);
+ pci_write_config_word(dev, pos, reg16);
+ }
}
/* AER capable */
if ((cap_mask & PCIE_PORT_SERVICE_AER)
- && pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR))
+ && pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR)) {
services |= PCIE_PORT_SERVICE_AER;
+ /*
+ * Disable AER on this port in case it's been enabled by the
+ * BIOS (the AER service driver will enable it when necessary).
+ */
+ pci_disable_pcie_error_reporting(dev);
+ }
/* VC support */
if (pci_find_ext_capability(dev, PCI_EXT_CAP_ID_VC))
services |= PCIE_PORT_SERVICE_VC;
/* Root ports are capable of generating PME too */
if ((cap_mask & PCIE_PORT_SERVICE_PME)
- && dev->pcie_type == PCI_EXP_TYPE_ROOT_PORT)
+ && dev->pcie_type == PCI_EXP_TYPE_ROOT_PORT) {
services |= PCIE_PORT_SERVICE_PME;
+ /*
+ * Disable PME interrupt on this port in case it's been enabled
+ * by the BIOS (the PME service driver will enable it when
+ * necessary).
+ */
+ pcie_pme_interrupt_enable(dev, false);
+ }
return services;
}