The function acpi_gsi_to_irq must return 0 on success as the caller
ghes_probe expects an 0 for success. This change also matches x86
implementation.
This patch was submitted around 4.5 timeframe but wasn't pushed because
it didn't fix a real problem. Now that RAS/GHES patches are in kernel,
this fixes an error seen on a Mustang (arm64) platform:
GHES: Failed to map GSI to IRQ for generic hardware error source: 2
GHES: probe of GHES.2 failed with error 81
Signed-off-by: Tuan Phan <tp...@apm.com>
Signed-off-by: Loc Ho <l...@apm.com>
[rebased to v4.12-rc]
Signed-off-by: Mark Salter <msal...@redhat.com>
---
drivers/acpi/irq.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/acpi/irq.c b/drivers/acpi/irq.c
index 830299a..7c352cb 100644
--- a/drivers/acpi/irq.c
+++ b/drivers/acpi/irq.c
@@ -24,7 +24,7 @@ static struct fwnode_handle *acpi_gsi_domain_id;
*
* irq location updated with irq value [>0 on success, 0 on failure]
*
- * Returns: linux IRQ number on success (>0)
+ * Returns: 0 on success
* -EINVAL on failure
*/
int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
@@ -37,7 +37,7 @@ int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
* *irq == 0 means no mapping, that should
* be reported as a failure
*/
- return (*irq > 0) ? *irq : -EINVAL;
+ return (*irq > 0) ? 0 : -EINVAL;
}
EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
--
2.9.4
