[PATCH 7/9] mmc: core: Attach PM domain prior probing of SDIO func driver

[Ulf Hansson]

Align the behvaior to how other buses are handling attachment of PM
domains. Additionally, let's add error handling.

Cc: Aaron Lu <aaron.lu at intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson at linaro.org>
---

For reference, this change has been discussed before.
http://lists.infradead.org/pipermail/linux-arm-kernel/2014-October/294278.html

---
 drivers/mmc/core/sdio_bus.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c
index bee02e6..71357b8 100644
--- a/drivers/mmc/core/sdio_bus.c
+++ b/drivers/mmc/core/sdio_bus.c
@@ -315,13 +315,19 @@ int sdio_add_func(struct sdio_func *func)
 
 	sdio_set_of_node(func);
 	sdio_acpi_set_handle(func);
+
+	ret = dev_pm_domain_attach(&func->dev, false);
+	if (ret)
+		return ret;
+
 	ret = device_add(&func->dev);
-	if (ret == 0) {
-		sdio_func_set_present(func);
-		dev_pm_domain_attach(&func->dev, false);
+	if (ret) {
+		dev_pm_domain_detach(&func->dev, false);
+		return ret;
 	}
 
-	return ret;
+	sdio_func_set_present(func);
+	return 0;
 }
 
 /*
-- 
1.9.1