sata_rcar: handle pm_runtime_get_sync failure cases

Calling pm_runtime_get_sync increments the counter even in case of
failure, causing incorrect ref count. Call pm_runtime_put if
pm_runtime_get_sync fails.

Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/ata/sata_rcar.c b/drivers/ata/sata_rcar.c
index 980aacd..141ac60 100644 (file)
--- a/drivers/ata/sata_rcar.c
+++ b/drivers/ata/sata_rcar.c
@@ -907,7 +907,7 @@ static int sata_rcar_probe(struct platform_device *pdev)
        pm_runtime_enable(dev);
        ret = pm_runtime_get_sync(dev);
        if (ret < 0)
-               goto err_pm_disable;
+               goto err_pm_put;
 
        host = ata_host_alloc(dev, 1);
        if (!host) {
@@ -937,7 +937,6 @@ static int sata_rcar_probe(struct platform_device *pdev)
 
 err_pm_put:
        pm_runtime_put(dev);
-err_pm_disable:
        pm_runtime_disable(dev);
        return ret;
 }
@@ -991,8 +990,10 @@ static int sata_rcar_resume(struct device *dev)
        int ret;
 
        ret = pm_runtime_get_sync(dev);
-       if (ret < 0)
+       if (ret < 0) {
+               pm_runtime_put(dev);
                return ret;
+       }
 
        if (priv->type == RCAR_GEN3_SATA) {
                sata_rcar_init_module(priv);
@@ -1017,8 +1018,10 @@ static int sata_rcar_restore(struct device *dev)
        int ret;
 
        ret = pm_runtime_get_sync(dev);
-       if (ret < 0)
+       if (ret < 0) {
+               pm_runtime_put(dev);
                return ret;
+       }
 
        sata_rcar_setup_port(host);