[Intel-gfx] [PATCH v3 1/3] x86/quirks: Replace QFLAG_APPLY_ONCE with static locals

[Lucas De Marchi]

The flags are only used to mark a quirk to be called once and nothing
else. Also, that logic may not be appropriate if the quirk wants to
do additional filtering and set quirk ass applied by itself.

So replace the uses of QFLAG_APPLY_ONCE with static local variables in
the few quirks that use this logic and remove all the flags logic.

Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
---

v3: Keep in this patch only the mechanical change to move from
QFLAG_APPLY_ONCE to static locals. Differently than v2, we don't try to
set quirk_applied in nvidia_bugs() and via_bugs() only when the
global resource is set - this patch is a mechanical move only and
shouldn't change any behavior. For intel_graphics_quirks(), we will move
it to the right place in a subsequent patch.

 arch/x86/kernel/early-quirks.c | 55 +++++++++++++++++++++-------------
 1 file changed, 34 insertions(+), 21 deletions(-)

diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c
index 391a4e2b8604..8b689c2b8cc7 100644
--- a/arch/x86/kernel/early-quirks.c
+++ b/arch/x86/kernel/early-quirks.c
@@ -57,6 +57,13 @@ static void __init fix_hypertransport_config(int num, int slot, int func)
 static void __init via_bugs(int  num, int slot, int func)
 {
 #ifdef CONFIG_GART_IOMMU
+	static bool quirk_applied __initdata;
+
+	if (quirk_applied)
+		return;
+
+	quirk_applied = true;
+
 	if ((max_pfn > MAX_DMA32_PFN ||  force_iommu) &&
 	    !gart_iommu_aperture_allowed) {
 		printk(KERN_INFO
@@ -81,6 +88,13 @@ static void __init nvidia_bugs(int num, int slot, int func)
 {
 #ifdef CONFIG_ACPI
 #ifdef CONFIG_X86_IO_APIC
+	static bool quirk_applied __initdata;
+
+	if (quirk_applied)
+		return;
+
+	quirk_applied = true;
+
 	/*
 	 * Only applies to Nvidia root ports (bus 0) and not to
 	 * Nvidia graphics cards with PCI ports on secondary buses.
@@ -587,10 +601,16 @@ intel_graphics_stolen(int num, int slot, int func,
 
 static void __init intel_graphics_quirks(int num, int slot, int func)
 {
+	static bool quirk_applied __initdata;
 	const struct intel_early_ops *early_ops;
 	u16 device;
 	int i;
 
+	if (quirk_applied)
+		return;
+
+	quirk_applied = true;
+
 	device = read_pci_config_16(num, slot, func, PCI_DEVICE_ID);
 
 	for (i = 0; i < ARRAY_SIZE(intel_early_ids); i++) {
@@ -673,37 +693,33 @@ static void __init apple_airport_reset(int bus, int slot, int func)
 	early_iounmap(mmio, BCM4331_MMIO_SIZE);
 }
 
-#define QFLAG_APPLY_ONCE 	0x1
-#define QFLAG_APPLIED		0x2
-#define QFLAG_DONE		(QFLAG_APPLY_ONCE|QFLAG_APPLIED)
 struct chipset {
 	u32 vendor;
 	u32 device;
 	u32 class;
 	u32 class_mask;
-	u32 flags;
 	void (*f)(int num, int slot, int func);
 };
 
 static struct chipset early_qrk[] __initdata = {
 	{ PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID,
-	  PCI_CLASS_BRIDGE_PCI, PCI_ANY_ID, QFLAG_APPLY_ONCE, nvidia_bugs },
+	  PCI_CLASS_BRIDGE_PCI, PCI_ANY_ID, nvidia_bugs },
 	{ PCI_VENDOR_ID_VIA, PCI_ANY_ID,
-	  PCI_CLASS_BRIDGE_PCI, PCI_ANY_ID, QFLAG_APPLY_ONCE, via_bugs },
+	  PCI_CLASS_BRIDGE_PCI, PCI_ANY_ID, via_bugs },
 	{ PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB,
-	  PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, fix_hypertransport_config },
+	  PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, fix_hypertransport_config },
 	{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_SMBUS,
-	  PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, 0, ati_bugs },
+	  PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, ati_bugs },
 	{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_SBX00_SMBUS,
-	  PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, 0, ati_bugs_contd },
+	  PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, ati_bugs_contd },
 	{ PCI_VENDOR_ID_INTEL, 0x3403, PCI_CLASS_BRIDGE_HOST,
-	  PCI_BASE_CLASS_BRIDGE, 0, intel_remapping_check },
+	  PCI_BASE_CLASS_BRIDGE, intel_remapping_check },
 	{ PCI_VENDOR_ID_INTEL, 0x3405, PCI_CLASS_BRIDGE_HOST,
-	  PCI_BASE_CLASS_BRIDGE, 0, intel_remapping_check },
+	  PCI_BASE_CLASS_BRIDGE, intel_remapping_check },
 	{ PCI_VENDOR_ID_INTEL, 0x3406, PCI_CLASS_BRIDGE_HOST,
-	  PCI_BASE_CLASS_BRIDGE, 0, intel_remapping_check },
+	  PCI_BASE_CLASS_BRIDGE, intel_remapping_check },
 	{ PCI_VENDOR_ID_INTEL, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA, PCI_ANY_ID,
-	  QFLAG_APPLY_ONCE, intel_graphics_quirks },
+	  intel_graphics_quirks },
 	/*
 	 * HPET on the current version of the Baytrail platform has accuracy
 	 * problems: it will halt in deep idle state - so we disable it.
@@ -713,9 +729,9 @@ static struct chipset early_qrk[] __initdata = {
 	 *    http://www.intel.com/content/dam/www/public/us/en/documents/datasheets/atom-z8000-datasheet-vol-1.pdf
 	 */
 	{ PCI_VENDOR_ID_INTEL, 0x0f00,
-		PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, force_disable_hpet},
+	  PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, force_disable_hpet},
 	{ PCI_VENDOR_ID_BROADCOM, 0x4331,
-	  PCI_CLASS_NETWORK_OTHER, PCI_ANY_ID, 0, apple_airport_reset},
+	  PCI_CLASS_NETWORK_OTHER, PCI_ANY_ID, apple_airport_reset},
 	{}
 };
 
@@ -756,12 +772,9 @@ static int __init check_dev_quirk(int num, int slot, int func)
 			((early_qrk[i].device == PCI_ANY_ID) ||
 			(early_qrk[i].device == device)) &&
 			(!((early_qrk[i].class ^ class) &
-			    early_qrk[i].class_mask))) {
-				if ((early_qrk[i].flags &
-				     QFLAG_DONE) != QFLAG_DONE)
-					early_qrk[i].f(num, slot, func);
-				early_qrk[i].flags |= QFLAG_APPLIED;
-			}
+			    early_qrk[i].class_mask)))
+				early_qrk[i].f(num, slot, func);
+
 	}
 
 	type = read_pci_config_byte(num, slot, func,
-- 
2.34.1