From: Uwe Kleine-König u.kleine-koenig@pengutronix.de
[ Upstream commit 61f49171a43ab1f80c73c5c88c508770c461e0f2 ]
Returning early in a platform driver's remove callback is wrong. In this case the dma resources are not released in the error path. this is never retried later and so this is a permanent leak. To fix this, only skip hardware disabling if waking the device fails.
Fixes: 64ff247a978f ("spi: Add Qualcomm QUP SPI controller support") Signed-off-by: Uwe Kleine-König u.kleine-koenig@pengutronix.de Link: https://lore.kernel.org/r/20230330210341.2459548-2-u.kleine-koenig@pengutron... Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/spi/spi-qup.c | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-)
diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c index f3877eeb3da65..8bf58510cca6d 100644 --- a/drivers/spi/spi-qup.c +++ b/drivers/spi/spi-qup.c @@ -1276,18 +1276,22 @@ static int spi_qup_remove(struct platform_device *pdev) struct spi_qup *controller = spi_master_get_devdata(master); int ret;
- ret = pm_runtime_resume_and_get(&pdev->dev); - if (ret < 0) - return ret; + ret = pm_runtime_get_sync(&pdev->dev);
- ret = spi_qup_set_state(controller, QUP_STATE_RESET); - if (ret) - return ret; + if (ret >= 0) { + ret = spi_qup_set_state(controller, QUP_STATE_RESET); + if (ret) + dev_warn(&pdev->dev, "failed to reset controller (%pe)\n", + ERR_PTR(ret));
- spi_qup_release_dma(master); + clk_disable_unprepare(controller->cclk); + clk_disable_unprepare(controller->iclk); + } else { + dev_warn(&pdev->dev, "failed to resume, skip hw disable (%pe)\n", + ERR_PTR(ret)); + }
- clk_disable_unprepare(controller->cclk); - clk_disable_unprepare(controller->iclk); + spi_qup_release_dma(master);
pm_runtime_put_noidle(&pdev->dev); pm_runtime_disable(&pdev->dev);