From: Rafael J. Wysocki <rjw@xxxxxxx>
Introduce a function allowing the caller to check whether to try to
enable PCIe AER.
Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
---
drivers/pci/pci.h | 2 ++
drivers/pci/pcie/aer/aerdrv.c | 9 ++++++---
2 files changed, 8 insertions(+), 3 deletions(-)
Index: linux-2.6/drivers/pci/pci.h
===================================================================
--- linux-2.6.orig/drivers/pci/pci.h
+++ linux-2.6/drivers/pci/pci.h
@@ -140,8 +140,10 @@ static inline void pci_msi_init_pci_dev(
#ifdef CONFIG_PCIEAER
void pci_no_aer(void);
+bool pci_aer_available(void);
#else
static inline void pci_no_aer(void) { }
+static inline bool pci_aer_available(void) { return false; }
#endif
static inline int pci_no_d1d2(struct pci_dev *dev)
Index: linux-2.6/drivers/pci/pcie/aer/aerdrv.c
===================================================================
--- linux-2.6.orig/drivers/pci/pcie/aer/aerdrv.c
+++ linux-2.6/drivers/pci/pcie/aer/aerdrv.c
@@ -72,6 +72,11 @@ void pci_no_aer(void)
pcie_aer_disable = 1; /* has priority over 'forceload' */
}
+bool pci_aer_available(void)
+{
+ return !pcie_aer_disable && pci_msi_enabled();
+}
+
static int set_device_error_reporting(struct pci_dev *dev, void *data)
{
bool enable = *((bool *)data);
@@ -411,9 +416,7 @@ static void aer_error_resume(struct pci_
*/
static int __init aer_service_init(void)
{
- if (pcie_aer_disable)
- return -ENXIO;
- if (!pci_msi_enabled())
+ if (!pci_aer_available())
return -ENXIO;
return pcie_port_service_register(&aerdriver);
}
--
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