2017-06-22 15:21 keltezéssel, Zoltán Böszörményi írta:
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, so synchronization is necessary. The other drivers will also be modified to use the new macro in subsequest patched. v1: Started with a common mutex in a C source file. v2: Declared the common mutex in drivers/usb/host/pci-quirks.c instead of in a common C file. v3: Switched to using the new request_declared_muxed_region macro. v4: Fixed checkpatch.pl warnings and use the new release_declared_region() macro. Signed-off-by: Zoltán Böszörményi <zbos...@pr.hu> --- drivers/usb/host/pci-quirks.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c index a9a1e4c..593942a 100644 --- a/drivers/usb/host/pci-quirks.c +++ b/drivers/usb/host/pci-quirks.c @@ -279,6 +279,8 @@ bool usb_amd_prefetch_quirk(void) } EXPORT_SYMBOL_GPL(usb_amd_prefetch_quirk);+static struct resource sb800_res = DEFINE_RES_IO_NAMED(0xcd6, 2, "SB800 USB");+ /* * The hardware normally enables the A-link power management feature, which * lets the system lower the power consumption in idle states. @@ -314,11 +316,13 @@ 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) { + request_declared_muxed_region(&sb800_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_declared_region(&sb800_res);outl_p(0x30, AB_INDX(addr));outl_p(0x40, AB_DATA(addr));
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