PCI: Pull PCI 'latency timer' setup up into the core

The 'latency timer' of PCI devices, both Type 0 and Type 1,
is setup in architecture-specific code [see: 'pcibios_set_master()'].
There are two approaches being taken by all the architectures - check
if the 'latency timer' is currently set between 16 and 255 and if not
bring it within bounds, or, do nothing (and then there is the
gratuitously different PA-RISC implementation).

There is nothing architecture-specific about PCI's 'latency timer' so
this patch pulls its setup functionality up into the PCI core by
creating a generic 'pcibios_set_master()' function using the '__weak'
attribute which can be used by all architectures as a default which,
if necessary, can then be over-ridden by architecture-specific code.

No functional change.

Signed-off-by: Myron Stowe <myron.stowe@redhat.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

10 files changed, 0 insertions, 45 deletions

diff --git a/arch/blackfin/include/asm/pci.h b/arch/blackfin/include/asm/pci.h
index 99cae2e3bac..74352c4597d 100644
--- a/arch/blackfin/include/asm/pci.h
+++ b/arch/blackfin/include/asm/pci.h
@@ -10,10 +10,6 @@
 #define PCIBIOS_MIN_IO 0x00001000
 #define PCIBIOS_MIN_MEM 0x10000000
 
-static inline void pcibios_set_master(struct pci_dev *dev)
-{
-	/* No special bus mastering setup handling */
-}
 static inline void pcibios_penalize_isa_irq(int irq)
 {
 	/* We don't do dynamic PCI IRQ allocation */
diff --git a/arch/frv/mb93090-mb00/pci-frv.c b/arch/frv/mb93090-mb00/pci-frv.c
index 6b4fb28e9f9..6a0cd644d7c 100644
--- a/arch/frv/mb93090-mb00/pci-frv.c
+++ b/arch/frv/mb93090-mb00/pci-frv.c
@@ -195,12 +195,6 @@ void __init pcibios_resource_survey(void)
 	pcibios_assign_resources();
 }
 
-/*
- *  If we set up a device for bus mastering, we need to check the latency
- *  timer as certain crappy BIOSes forget to set it properly.
- */
-unsigned int pcibios_max_latency = 255;
-
 void pcibios_set_master(struct pci_dev *dev)
 {
 	u8 lat;
diff --git a/arch/frv/mb93090-mb00/pci-frv.h b/arch/frv/mb93090-mb00/pci-frv.h
index f3fe5591479..089eeba4f3b 100644
--- a/arch/frv/mb93090-mb00/pci-frv.h
+++ b/arch/frv/mb93090-mb00/pci-frv.h
@@ -26,8 +26,6 @@ extern unsigned int __nongpreldata pci_probe;
 
 /* pci-frv.c */
 
-extern unsigned int pcibios_max_latency;
-
 void pcibios_resource_survey(void);
 
 /* pci-vdk.c */
diff --git a/arch/h8300/include/asm/pci.h b/arch/h8300/include/asm/pci.h
index cc9762091c0..0b2acaa3dd8 100644
--- a/arch/h8300/include/asm/pci.h
+++ b/arch/h8300/include/asm/pci.h
@@ -9,11 +9,6 @@
 
 #define pcibios_assign_all_busses()	0
 
-static inline void pcibios_set_master(struct pci_dev *dev)
-{
-	/* No special bus mastering setup handling */
-}
-
 static inline void pcibios_penalize_isa_irq(int irq, int active)
 {
 	/* We don't do dynamic PCI IRQ allocation */
diff --git a/arch/mips/pci/pci.c b/arch/mips/pci/pci.c
index 41af7fa2887..f93f749b92e 100644
--- a/arch/mips/pci/pci.c
+++ b/arch/mips/pci/pci.c
@@ -205,12 +205,6 @@ static int pcibios_enable_resources(struct pci_dev *dev, int mask)
 	return 0;
 }
 
-/*
- *  If we set up a device for bus mastering, we need to check the latency
- *  timer as certain crappy BIOSes forget to set it properly.
- */
-static unsigned int pcibios_max_latency = 255;
-
 void pcibios_set_master(struct pci_dev *dev)
 {
 	u8 lat;
diff --git a/arch/mn10300/unit-asb2305/pci-asb2305.c b/arch/mn10300/unit-asb2305/pci-asb2305.c
index 8e6763e6f25..2b299c413ae 100644
--- a/arch/mn10300/unit-asb2305/pci-asb2305.c
+++ b/arch/mn10300/unit-asb2305/pci-asb2305.c
@@ -213,12 +213,6 @@ void __init pcibios_resource_survey(void)
 	pcibios_allocate_resources(1);
 }
 
-/*
- *  If we set up a device for bus mastering, we need to check the latency
- *  timer as certain crappy BIOSes forget to set it properly.
- */
-unsigned int pcibios_max_latency = 255;
-
 void pcibios_set_master(struct pci_dev *dev)
 {
 	u8 lat;
diff --git a/arch/mn10300/unit-asb2305/pci-asb2305.h b/arch/mn10300/unit-asb2305/pci-asb2305.h
index c3fa294b6e2..1194fe486b0 100644
--- a/arch/mn10300/unit-asb2305/pci-asb2305.h
+++ b/arch/mn10300/unit-asb2305/pci-asb2305.h
@@ -31,8 +31,6 @@ extern unsigned int pci_probe;
 
 /* pci-asb2305.c */
 
-extern unsigned int pcibios_max_latency;
-
 extern void pcibios_resource_survey(void);
 
 /* pci.c */
diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c
index c2691afe8f7..cfdb2f65294 100644
--- a/arch/sh/drivers/pci/pci.c
+++ b/arch/sh/drivers/pci/pci.c
@@ -243,12 +243,6 @@ int pcibios_enable_device(struct pci_dev *dev, int mask)
 	return pci_enable_resources(dev, mask);
 }
 
-/*
- *  If we set up a device for bus mastering, we need to check and set
- *  the latency timer as it may not be properly set.
- */
-static unsigned int pcibios_max_latency = 255;
-
 void pcibios_set_master(struct pci_dev *dev)
 {
 	u8 lat;
diff --git a/arch/x86/include/asm/pci_x86.h b/arch/x86/include/asm/pci_x86.h
index e3819780685..b3a53174602 100644
--- a/arch/x86/include/asm/pci_x86.h
+++ b/arch/x86/include/asm/pci_x86.h
@@ -44,8 +44,6 @@ enum pci_bf_sort_state {
 
 /* pci-i386.c */
 
-extern unsigned int pcibios_max_latency;
-
 void pcibios_resource_survey(void);
 void pcibios_set_cache_line_size(void);
 
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c
index 794b092d01a..dd5806b0fc8 100644
--- a/arch/x86/pci/i386.c
+++ b/arch/x86/pci/i386.c
@@ -254,12 +254,6 @@ void __init pcibios_resource_survey(void)
  */
 fs_initcall(pcibios_assign_resources);
 
-/*
- *  If we set up a device for bus mastering, we need to check the latency
- *  timer as certain crappy BIOSes forget to set it properly.
- */
-unsigned int pcibios_max_latency = 255;
-
 void pcibios_set_master(struct pci_dev *dev)
 {
 	u8 lat;