spi: imx: fix reference leak in two imx operations

pm_runtime_get_sync will increment pm usage counter even it
failed. Forgetting to pm_runtime_put_noidle will result in
reference leak in callers(spi_imx_prepare_message and
spi_imx_remove), so we should fix it.

Fixes: 525c9e5a32bd7 ("spi: imx: enable runtime pm support")
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Link: https://lore.kernel.org/r/20201102145835.4765-1-zhangqilong3@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 4b80e27..8911465 100644 (file)
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -1538,6 +1538,7 @@ spi_imx_prepare_message(struct spi_master *master, struct spi_message *msg)
 
        ret = pm_runtime_get_sync(spi_imx->dev);
        if (ret < 0) {
+               pm_runtime_put_noidle(spi_imx->dev);
                dev_err(spi_imx->dev, "failed to enable clock\n");
                return ret;
        }
@@ -1747,6 +1748,7 @@ static int spi_imx_remove(struct platform_device *pdev)
 
        ret = pm_runtime_get_sync(spi_imx->dev);
        if (ret < 0) {
+               pm_runtime_put_noidle(spi_imx->dev);
                dev_err(spi_imx->dev, "failed to enable clock\n");
                return ret;
        }