spi: mt65xx: Properly handle failures in .remove()

Returning an error code in a platform driver's remove function is wrong
most of the time and there is an effort to make the callback return
void. To prepare this rework the function not to exit early.

There wasn't a real problem because if pm runtime resume failed the only
step missing was pm_runtime_disable() which isn't an issue.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230530081648.2199419-2-u.kleine-koenig@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
index 21c321f..9333a0e 100644 (file)
--- a/drivers/spi/spi-mt65xx.c
+++ b/drivers/spi/spi-mt65xx.c
@@ -1275,15 +1275,21 @@ static int mtk_spi_remove(struct platform_device *pdev)
        struct mtk_spi *mdata = spi_master_get_devdata(master);
        int ret;
 
-       ret = pm_runtime_resume_and_get(&pdev->dev);
-       if (ret < 0)
-               return ret;
-
-       mtk_spi_reset(mdata);
+       ret = pm_runtime_get_sync(&pdev->dev);
+       if (ret < 0) {
+               dev_warn(&pdev->dev, "Failed to resume hardware (%pe)\n", ERR_PTR(ret));
+       } else {
+               /*
+                * If pm runtime resume failed, clks are disabled and
+                * unprepared. So don't access the hardware and skip clk
+                * unpreparing.
+                */
+               mtk_spi_reset(mdata);
 
-       if (mdata->dev_comp->no_need_unprepare) {
-               clk_unprepare(mdata->spi_clk);
-               clk_unprepare(mdata->spi_hclk);
+               if (mdata->dev_comp->no_need_unprepare) {
+                       clk_unprepare(mdata->spi_clk);
+                       clk_unprepare(mdata->spi_hclk);
+               }
        }
 
        pm_runtime_put_noidle(&pdev->dev);