From: Alain Volmat alain.volmat@foss.st.com
stable inclusion from stable-5.10.54 commit 23811b75fdb8c513da1119ded9d938dbb8a03e1d bugzilla: 175586 https://gitee.com/openeuler/kernel/issues/I4DVDU
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 7999d2555c9f879d006ea8469d74db9cdb038af0 ]
Add pm_runtime calls in probe/probe error path and remove in order to be consistent in all places in ordering and ensure that pm_runtime is disabled prior to resources used by the SPI controller.
This patch also fixes the 2 following warnings on driver remove: WARNING: CPU: 0 PID: 743 at drivers/clk/clk.c:594 clk_core_disable_lock+0x18/0x24 WARNING: CPU: 0 PID: 743 at drivers/clk/clk.c:476 clk_unprepare+0x24/0x2c
Fixes: 038ac869c9d2 ("spi: stm32: add runtime PM support")
Signed-off-by: Amelie Delaunay amelie.delaunay@foss.st.com Signed-off-by: Alain Volmat alain.volmat@foss.st.com Link: https://lore.kernel.org/r/1625646426-5826-2-git-send-email-alain.volmat@foss... Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Chen Jun chenjun102@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com Signed-off-by: Chen Jun chenjun102@huawei.com --- drivers/spi/spi-stm32.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c index 0318f02d6212..8f91f8705eee 100644 --- a/drivers/spi/spi-stm32.c +++ b/drivers/spi/spi-stm32.c @@ -1946,6 +1946,7 @@ static int stm32_spi_probe(struct platform_device *pdev) master->can_dma = stm32_spi_can_dma;
pm_runtime_set_active(&pdev->dev); + pm_runtime_get_noresume(&pdev->dev); pm_runtime_enable(&pdev->dev);
ret = spi_register_master(master); @@ -1967,6 +1968,8 @@ static int stm32_spi_probe(struct platform_device *pdev)
err_pm_disable: pm_runtime_disable(&pdev->dev); + pm_runtime_put_noidle(&pdev->dev); + pm_runtime_set_suspended(&pdev->dev); err_dma_release: if (spi->dma_tx) dma_release_channel(spi->dma_tx); @@ -1983,9 +1986,14 @@ static int stm32_spi_remove(struct platform_device *pdev) struct spi_master *master = platform_get_drvdata(pdev); struct stm32_spi *spi = spi_master_get_devdata(master);
+ pm_runtime_get_sync(&pdev->dev); + spi_unregister_master(master); spi->cfg->disable(spi);
+ pm_runtime_disable(&pdev->dev); + pm_runtime_put_noidle(&pdev->dev); + pm_runtime_set_suspended(&pdev->dev); if (master->dma_tx) dma_release_channel(master->dma_tx); if (master->dma_rx) @@ -1993,7 +2001,6 @@ static int stm32_spi_remove(struct platform_device *pdev)
clk_disable_unprepare(spi->clk);
- pm_runtime_disable(&pdev->dev);
pinctrl_pm_select_sleep_state(&pdev->dev);