diff options
| author | Alex He <alex.he@amd.com> | 2012-03-30 10:21:38 +0800 |
|---|---|---|
| committer | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2012-04-11 08:31:06 -0700 |
| commit | 95018a53f7653e791bba1f54c8d75d9cb700d1bd (patch) | |
| tree | 943dcbd00aac0b5aa623dede2d77619cd83ca18a /drivers/usb/host/pci-quirks.c | |
| parent | 3fc8206d3dca1550eb0a1f6e2a350881835954ba (diff) | |
| download | blackbird-op-linux-95018a53f7653e791bba1f54c8d75d9cb700d1bd.tar.gz blackbird-op-linux-95018a53f7653e791bba1f54c8d75d9cb700d1bd.zip | |
xHCI: Correct the #define XHCI_LEGACY_DISABLE_SMI
Re-define XHCI_LEGACY_DISABLE_SMI and used it in right way. All SMI enable
bits will be cleared to zero and flag bits 29:31 are also cleared to zero.
Other bits should be presvered as Table 146.
This patch should be backported to kernels as old as 2.6.31.
Signed-off-by: Alex He <alex.he@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/usb/host/pci-quirks.c')
| -rw-r--r-- | drivers/usb/host/pci-quirks.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c index 11de5f1be981..32dada8c8b4f 100644 --- a/drivers/usb/host/pci-quirks.c +++ b/drivers/usb/host/pci-quirks.c @@ -825,9 +825,13 @@ static void __devinit quirk_usb_handoff_xhci(struct pci_dev *pdev) } } - /* Disable any BIOS SMIs */ - writel(XHCI_LEGACY_DISABLE_SMI, - base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET); + val = readl(base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET); + /* Mask off (turn off) any enabled SMIs */ + val &= XHCI_LEGACY_DISABLE_SMI; + /* Mask all SMI events bits, RW1C */ + val |= XHCI_LEGACY_SMI_EVENTS; + /* Disable any BIOS SMIs and clear all SMI events*/ + writel(val, base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET); if (usb_is_intel_switchable_xhci(pdev)) usb_enable_xhci_ports(pdev); |
