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[3/5] usb: pci-quirks: Protect the I/O port pair of SB800

Message ID 20170621035349.4125-4-zboszor@pr.hu
State Superseded
Headers show

Commit Message

Böszörményi Zoltán June 21, 2017, 3:53 a.m. UTC 
This patch uses the previously introduced macro called
request_declared_muxed_region() to synchronize access to
the I/O port pair 0xcd6 / 0xcd7 on SB800.

These I/O ports are also used by i2c-piix4 and sp5100_tco,
the next two patches port these drivers to use the new macro.

Signed-off-by: Zoltán Böszörményi <zboszor@pr.hu>
---
 drivers/usb/host/pci-quirks.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox

Patch

diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
index a9a1e4c..703eb65 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -314,11 +314,14 @@  static void usb_amd_quirk_pll(int disable)
 	if (amd_chipset.sb_type.gen == AMD_CHIPSET_SB800 ||
 			amd_chipset.sb_type.gen == AMD_CHIPSET_HUDSON2 ||
 			amd_chipset.sb_type.gen == AMD_CHIPSET_BOLTON) {
+		struct resource res = DEFINE_RES_IO_NAMED(0xcd6, 2, "USB host SB800/HUDSON2/BOLTON");
+		request_declared_muxed_region(&res);
 		outb_p(AB_REG_BAR_LOW, 0xcd6);
 		addr_low = inb_p(0xcd7);
 		outb_p(AB_REG_BAR_HIGH, 0xcd6);
 		addr_high = inb_p(0xcd7);
 		addr = addr_high << 8 | addr_low;
+		release_region(0xcd6, 2);
 
 		outl_p(0x30, AB_INDX(addr));
 		outl_p(0x40, AB_DATA(addr));