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| author | Patrice Chotard <patrice.chotard@st.com> | 2020-06-16 14:30:35 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2020-06-17 15:26:41 +0300 |
| commit | 35700e221b18fa53401e5f315be90af9e0bbcdca (patch) | |
| tree | 3a1e068923f8f872a7a13674c906df4e0c775786 /drivers/spi | |
| parent | 27784a256c2a453d891c0aaff84c3ac3f2e8a5a0 (diff) | |
| download | linux-35700e221b18fa53401e5f315be90af9e0bbcdca.tar.xz | |
spi: stm32-qspi: Fix error path in case of -EPROBE_DEFER
In case of -EPROBE_DEFER, stm32_qspi_release() was called
in any case which unregistered driver from pm_runtime framework
even if it has not been registered yet to it. This leads to:
stm32-qspi 58003000.spi: can't setup spi0.0, status -13
spi_master spi0: spi_device register error /soc/spi@58003000/mx66l51235l@0
spi_master spi0: Failed to create SPI device for /soc/spi@58003000/mx66l51235l@0
stm32-qspi 58003000.spi: can't setup spi0.1, status -13
spi_master spi0: spi_device register error /soc/spi@58003000/mx66l51235l@1
spi_master spi0: Failed to create SPI device for /soc/spi@58003000/mx66l51235l@1
On v5.7 kernel,this issue was not "visible", qspi driver was probed
successfully.
Fixes: 9d282c17b023 ("spi: stm32-qspi: Add pm_runtime support")
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Link: https://lore.kernel.org/r/20200616113035.4514-1-patrice.chotard@st.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-stm32-qspi.c | 46 |
1 files changed, 26 insertions, 20 deletions
diff --git a/drivers/spi/spi-stm32-qspi.c b/drivers/spi/spi-stm32-qspi.c index 3c44bb2fd9b1..a900962b4336 100644 --- a/drivers/spi/spi-stm32-qspi.c +++ b/drivers/spi/spi-stm32-qspi.c @@ -553,20 +553,6 @@ static const struct spi_controller_mem_ops stm32_qspi_mem_ops = { .exec_op = stm32_qspi_exec_op, }; -static void stm32_qspi_release(struct stm32_qspi *qspi) -{ - pm_runtime_get_sync(qspi->dev); - /* disable qspi */ - writel_relaxed(0, qspi->io_base + QSPI_CR); - stm32_qspi_dma_free(qspi); - mutex_destroy(&qspi->lock); - pm_runtime_put_noidle(qspi->dev); - pm_runtime_disable(qspi->dev); - pm_runtime_set_suspended(qspi->dev); - pm_runtime_dont_use_autosuspend(qspi->dev); - clk_disable_unprepare(qspi->clk); -} - static int stm32_qspi_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -642,7 +628,7 @@ static int stm32_qspi_probe(struct platform_device *pdev) if (IS_ERR(rstc)) { ret = PTR_ERR(rstc); if (ret == -EPROBE_DEFER) - goto err_qspi_release; + goto err_clk_disable; } else { reset_control_assert(rstc); udelay(2); @@ -653,7 +639,7 @@ static int stm32_qspi_probe(struct platform_device *pdev) platform_set_drvdata(pdev, qspi); ret = stm32_qspi_dma_setup(qspi); if (ret) - goto err_qspi_release; + goto err_dma_free; mutex_init(&qspi->lock); @@ -673,15 +659,26 @@ static int stm32_qspi_probe(struct platform_device *pdev) ret = devm_spi_register_master(dev, ctrl); if (ret) - goto err_qspi_release; + goto err_pm_runtime_free; pm_runtime_mark_last_busy(dev); pm_runtime_put_autosuspend(dev); return 0; -err_qspi_release: - stm32_qspi_release(qspi); +err_pm_runtime_free: + pm_runtime_get_sync(qspi->dev); + /* disable qspi */ + writel_relaxed(0, qspi->io_base + QSPI_CR); + mutex_destroy(&qspi->lock); + pm_runtime_put_noidle(qspi->dev); + pm_runtime_disable(qspi->dev); + pm_runtime_set_suspended(qspi->dev); + pm_runtime_dont_use_autosuspend(qspi->dev); +err_dma_free: + stm32_qspi_dma_free(qspi); +err_clk_disable: + clk_disable_unprepare(qspi->clk); err_master_put: spi_master_put(qspi->ctrl); @@ -692,7 +689,16 @@ static int stm32_qspi_remove(struct platform_device *pdev) { struct stm32_qspi *qspi = platform_get_drvdata(pdev); - stm32_qspi_release(qspi); + pm_runtime_get_sync(qspi->dev); + /* disable qspi */ + writel_relaxed(0, qspi->io_base + QSPI_CR); + stm32_qspi_dma_free(qspi); + mutex_destroy(&qspi->lock); + pm_runtime_put_noidle(qspi->dev); + pm_runtime_disable(qspi->dev); + pm_runtime_set_suspended(qspi->dev); + pm_runtime_dont_use_autosuspend(qspi->dev); + clk_disable_unprepare(qspi->clk); return 0; } |