misc/pvpanic: simplify the code using acpi_dev_resource_io

Use acpi_dev_resource_io API.

Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Peng Hao <peng.hao2@zte.com.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 5 insertions, 8 deletions

diff --git a/drivers/misc/pvpanic.c b/drivers/misc/pvpanic.c
index fd86daba7ffd..49c59e1d299d 100644
--- a/drivers/misc/pvpanic.c
+++ b/drivers/misc/pvpanic.c
@@ -77,17 +77,14 @@ static struct notifier_block pvpanic_panic_nb = {
 static acpi_status
 pvpanic_walk_resources(struct acpi_resource *res, void *context)
 {
-        switch (res->type) {
-        case ACPI_RESOURCE_TYPE_END_TAG:
-                return AE_OK;
+        struct resource r;
 
-        case ACPI_RESOURCE_TYPE_IO:
-                port = res->data.io.minimum;
+        if (acpi_dev_resource_io(res, &r)) {
+                port = r.start;
                 return AE_OK;
-
-        default:
-                return AE_ERROR;
         }
+
+        return AE_ERROR;
 }
 
 static int pvpanic_add(struct acpi_device *device)