From: Andi Kleen <ak@suse.de>
Date: Tue, 11 Apr 2006 10:54:48 +0000 (+0200)
Subject: [PATCH] i386/x86-64: Remove checks for value == NULL in PCI config space access
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ecc16ba96fd5b1a1c1988f0a2b05ff954bdff728;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git

[PATCH] i386/x86-64: Remove checks for value == NULL in PCI config space access

Nobody should pass NULL here. Could in theory make it a BUG,
but the NULL pointer oops will do as well.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/i386/pci/direct.c b/arch/i386/pci/direct.c
index 0659ced01185..5d81fb510375 100644
--- a/arch/i386/pci/direct.c
+++ b/arch/i386/pci/direct.c
@@ -19,7 +19,7 @@ int pci_conf1_read(unsigned int seg, unsigned int bus,
 {
 	unsigned long flags;
 
-	if (!value || (bus > 255) || (devfn > 255) || (reg > 255)) {
+	if ((bus > 255) || (devfn > 255) || (reg > 255)) {
 		*value = -1;
 		return -EINVAL;
 	}
@@ -94,8 +94,10 @@ static int pci_conf2_read(unsigned int seg, unsigned int bus,
 	unsigned long flags;
 	int dev, fn;
 
-	if (!value || (bus > 255) || (devfn > 255) || (reg > 255))
+	if ((bus > 255) || (devfn > 255) || (reg > 255)) {
+		*value = -1;
 		return -EINVAL;
+	}
 
 	dev = PCI_SLOT(devfn);
 	fn = PCI_FUNC(devfn);
diff --git a/arch/i386/pci/mmconfig.c b/arch/i386/pci/mmconfig.c
index f77d7f8b9bf6..6b1ea0c9a570 100644
--- a/arch/i386/pci/mmconfig.c
+++ b/arch/i386/pci/mmconfig.c
@@ -80,7 +80,7 @@ static int pci_mmcfg_read(unsigned int seg, unsigned int bus,
 	unsigned long flags;
 	u32 base;
 
-	if (!value || (bus > 255) || (devfn > 255) || (reg > 4095)) {
+	if ((bus > 255) || (devfn > 255) || (reg > 4095)) {
 		*value = -1;
 		return -EINVAL;
 	}
diff --git a/arch/x86_64/pci/mmconfig.c b/arch/x86_64/pci/mmconfig.c
index b493ed977e7c..1a59a31bb740 100644
--- a/arch/x86_64/pci/mmconfig.c
+++ b/arch/x86_64/pci/mmconfig.c
@@ -75,7 +75,7 @@ static int pci_mmcfg_read(unsigned int seg, unsigned int bus,
 	char __iomem *addr;
 
 	/* Why do we have this when nobody checks it. How about a BUG()!? -AK */
-	if (unlikely(!value || (bus > 255) || (devfn > 255) || (reg > 4095))) {
+	if (unlikely((bus > 255) || (devfn > 255) || (reg > 4095))) {
 		*value = -1;
 		return -EINVAL;
 	}