From: Lukas Wunner <lukas@wunner.de>
To: Mark Brown <broonie@kernel.org>
Cc: linux-spi@vger.kernel.org,
Masahisa Kojima <masahisa.kojima@linaro.org>,
Jassi Brar <jaswinder.singh@linaro.org>
Subject: [PATCH] spi: synquacer: Disable clock in probe error path
Date: Sun, 8 Nov 2020 23:41:00 +0100 [thread overview]
Message-ID: <232281df1ab91d8f0f553a62d5f97fc264ace4da.1604874488.git.lukas@wunner.de> (raw)
In-Reply-To: <dd060534490eca5e946eb9165916542b01a9358d.1604874488.git.lukas@wunner.de>
If the calls to platform_get_irq() or devm_request_irq() fail on probe
of the SynQuacer SPI driver, the clock "sspi->clk" is erroneously not
unprepared and disabled.
If the clock rate "master->max_speed_hz" cannot be determined, the same
happens and in addition the spi_master struct is not freed.
Fix it.
Fixes: b0823ee35cf9 ("spi: Add spi driver for Socionext SynQuacer platform")
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: <stable@vger.kernel.org> # v5.3+
Cc: Masahisa Kojima <masahisa.kojima@linaro.org>
---
drivers/spi/spi-synquacer.c | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)
diff --git a/drivers/spi/spi-synquacer.c b/drivers/spi/spi-synquacer.c
index 42e82dbe3d41..8cdca6ab8098 100644
--- a/drivers/spi/spi-synquacer.c
+++ b/drivers/spi/spi-synquacer.c
@@ -657,7 +657,8 @@ static int synquacer_spi_probe(struct platform_device *pdev)
if (!master->max_speed_hz) {
dev_err(&pdev->dev, "missing clock source\n");
- return -EINVAL;
+ ret = -EINVAL;
+ goto disable_clk;
}
master->min_speed_hz = master->max_speed_hz / 254;
@@ -670,7 +671,7 @@ static int synquacer_spi_probe(struct platform_device *pdev)
rx_irq = platform_get_irq(pdev, 0);
if (rx_irq <= 0) {
ret = rx_irq;
- goto put_spi;
+ goto disable_clk;
}
snprintf(sspi->rx_irq_name, SYNQUACER_HSSPI_IRQ_NAME_MAX, "%s-rx",
dev_name(&pdev->dev));
@@ -678,13 +679,13 @@ static int synquacer_spi_probe(struct platform_device *pdev)
0, sspi->rx_irq_name, sspi);
if (ret) {
dev_err(&pdev->dev, "request rx_irq failed (%d)\n", ret);
- goto put_spi;
+ goto disable_clk;
}
tx_irq = platform_get_irq(pdev, 1);
if (tx_irq <= 0) {
ret = tx_irq;
- goto put_spi;
+ goto disable_clk;
}
snprintf(sspi->tx_irq_name, SYNQUACER_HSSPI_IRQ_NAME_MAX, "%s-tx",
dev_name(&pdev->dev));
@@ -692,7 +693,7 @@ static int synquacer_spi_probe(struct platform_device *pdev)
0, sspi->tx_irq_name, sspi);
if (ret) {
dev_err(&pdev->dev, "request tx_irq failed (%d)\n", ret);
- goto put_spi;
+ goto disable_clk;
}
master->dev.of_node = np;
@@ -710,7 +711,7 @@ static int synquacer_spi_probe(struct platform_device *pdev)
ret = synquacer_spi_enable(master);
if (ret)
- goto fail_enable;
+ goto disable_clk;
pm_runtime_set_active(sspi->dev);
pm_runtime_enable(sspi->dev);
@@ -723,7 +724,7 @@ static int synquacer_spi_probe(struct platform_device *pdev)
disable_pm:
pm_runtime_disable(sspi->dev);
-fail_enable:
+disable_clk:
clk_disable_unprepare(sspi->clk);
put_spi:
spi_master_put(master);
--
2.28.0
next prev parent reply other threads:[~2020-11-08 22:49 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-08 22:41 [PATCH] spi: davinci: Fix use-after-free on unbind Lukas Wunner
2020-11-08 22:41 ` [PATCH] spi: st-ssc4: Fix unbalanced pm_runtime_disable() in probe error path Lukas Wunner
2020-11-12 19:39 ` Mark Brown
2020-11-08 22:41 ` Lukas Wunner [this message]
2020-11-09 14:22 ` [PATCH] spi: synquacer: Disable clock " Andy Shevchenko
2020-11-09 15:04 ` Lukas Wunner
2020-11-12 19:39 ` Mark Brown
2020-11-08 22:41 ` [PATCH] spi: lpspi: Fix use-after-free on unbind Lukas Wunner
2020-11-12 19:39 ` Mark Brown
2020-11-08 22:41 ` [PATCH] spi: atmel-quadspi: Disable clock in probe error path Lukas Wunner
2020-11-09 18:56 ` Tudor.Ambarus
2020-11-10 16:03 ` Mark Brown
2020-11-08 22:41 ` [PATCH] spi: pic32: Don't leak DMA channels " Lukas Wunner
2020-11-12 19:39 ` Mark Brown
2020-11-09 7:26 ` [PATCH] spi: davinci: Fix use-after-free on unbind Peter Ujfalusi
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