ACPI: APEI: Enable APEI multiple GHES source to share a single external IRQ

X-Gene platforms describe multiple GHES error sources with the same
hardware error notification type (external interrupt) and interrupt
number.

Change the GHES interrupt request to support sharing the same IRQ.

This change includs contributions from Tuan Phan <tphan@apm.com>.

Signed-off-by: Loc Ho <lho@apm.com>
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index d661d452b238..eed09fc664e8 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -1157,7 +1157,8 @@ static int ghes_probe(struct platform_device *ghes_dev)
                                generic->header.source_id);
                         goto err_edac_unreg;
                 }
-                rc = request_irq(ghes->irq, ghes_irq_func, 0, "GHES IRQ", ghes);
+                rc = request_irq(ghes->irq, ghes_irq_func, IRQF_SHARED,
+                                 "GHES IRQ", ghes);
                 if (rc) {
                         pr_err(GHES_PFX "Failed to register IRQ for generic hardware error source: %d\n",
                                generic->header.source_id);