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powerpc/eeh: Cleanup on eeh_subsystem_enabled 

The patch cleans up variable eeh_subsystem_enabled so that we needn't
refer the variable directly from external. Instead, we will use
function eeh_enabled() and eeh_set_enable() to operate the variable.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Gavin Shan 2014-02-12 15:24:55 +08:00 committed by Benjamin Herrenschmidt
parent 5b2e198e50
commit 2ec5a0adf6
4 changed files with 27 additions and 10 deletions
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21
arch/powerpc/include/asm/eeh.h
View File

@ -172,10 +172,20 @@ struct eeh_ops {
};
extern struct eeh_ops *eeh_ops;
extern int eeh_subsystem_enabled;
extern bool eeh_subsystem_enabled;
extern raw_spinlock_t confirm_error_lock;
extern int eeh_probe_mode;
static inline bool eeh_enabled(void)
{
return eeh_subsystem_enabled;
}
static inline void eeh_set_enable(bool mode)
{
eeh_subsystem_enabled = mode;
}
#define EEH_PROBE_MODE_DEV (1<<0) /* From PCI device */
#define EEH_PROBE_MODE_DEVTREE (1<<1) /* From device tree */
@ -246,7 +256,7 @@ void eeh_remove_device(struct pci_dev *);
* If this macro yields TRUE, the caller relays to eeh_check_failure()
* which does further tests out of line.
*/
#define EEH_POSSIBLE_ERROR(val, type) ((val) == (type)~0 && eeh_subsystem_enabled)
#define EEH_POSSIBLE_ERROR(val, type) ((val) == (type)~0 && eeh_enabled())
/*
* Reads from a device which has been isolated by EEH will return
@ -257,6 +267,13 @@ void eeh_remove_device(struct pci_dev *);
#else /* !CONFIG_EEH */
static inline bool eeh_enabled(void)
{
return false;
}
static inline void eeh_set_enable(bool mode) { }
static inline int eeh_init(void)
{
return 0;

12
arch/powerpc/kernel/eeh.c
View File

@ -89,7 +89,7 @@
/* Platform dependent EEH operations */
struct eeh_ops *eeh_ops = NULL;
int eeh_subsystem_enabled;
bool eeh_subsystem_enabled = false;
EXPORT_SYMBOL(eeh_subsystem_enabled);
/*
@ -364,7 +364,7 @@ int eeh_dev_check_failure(struct eeh_dev *edev)
eeh_stats.total_mmio_ffs++;
if (!eeh_subsystem_enabled)
if (!eeh_enabled())
return 0;
if (!edev) {
@ -822,7 +822,7 @@ int eeh_init(void)
return ret;
}
if (eeh_subsystem_enabled)
if (eeh_enabled())
pr_info("EEH: PCI Enhanced I/O Error Handling Enabled\n");
else
pr_warning("EEH: No capable adapters found\n");
@ -897,7 +897,7 @@ void eeh_add_device_late(struct pci_dev *dev)
struct device_node *dn;
struct eeh_dev *edev;
if (!dev || !eeh_subsystem_enabled)
if (!dev || !eeh_enabled())
return;
pr_debug("EEH: Adding device %s\n", pci_name(dev));
@ -1005,7 +1005,7 @@ void eeh_remove_device(struct pci_dev *dev)
{
struct eeh_dev *edev;
if (!dev || !eeh_subsystem_enabled)
if (!dev || !eeh_enabled())
return;
edev = pci_dev_to_eeh_dev(dev);
@ -1045,7 +1045,7 @@ void eeh_remove_device(struct pci_dev *dev)
static int proc_eeh_show(struct seq_file *m, void *v)
{
if (0 == eeh_subsystem_enabled) {
if (!eeh_enabled()) {
seq_printf(m, "EEH Subsystem is globally disabled\n");
seq_printf(m, "eeh_total_mmio_ffs=%llu\n", eeh_stats.total_mmio_ffs);
} else {

2
arch/powerpc/platforms/powernv/eeh-powernv.c
View File

@ -145,7 +145,7 @@ static int powernv_eeh_dev_probe(struct pci_dev *dev, void *flag)
* Enable EEH explicitly so that we will do EEH check
* while accessing I/O stuff
*/
eeh_subsystem_enabled = 1;
eeh_set_enable(true);
/* Save memory bars */
eeh_save_bars(edev);

2
arch/powerpc/platforms/pseries/eeh_pseries.c
View File

@ -265,7 +265,7 @@ static void *pseries_eeh_of_probe(struct device_node *dn, void *flag)
enable = 1;
if (enable) {
eeh_subsystem_enabled = 1;
eeh_set_enable(true);
eeh_add_to_parent_pe(edev);
pr_debug("%s: EEH enabled on %s PHB#%d-PE#%x, config addr#%x\n",