spi: mxic: Don't leak SPI master in probe error path

If the calls to devm_clk_get() or devm_ioremap_resource() fail on probe
of the Macronix SPI driver, the spi_master struct is erroneously not freed.

Fix by switching over to the new devm_spi_alloc_master() helper.

Fixes: b942d80b0a39 ("spi: Add MXIC controller driver")
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: <stable@vger.kernel.org> # v5.0+: 5e844cc37a5c: spi: Introduce device-managed SPI controller allocation
Cc: <stable@vger.kernel.org> # v5.0+
Cc: Mason Yang <masonccyang@mxic.com.tw>
Link: https://lore.kernel.org/r/4fa6857806e7e75741c05d057ac9df3564460114.1607286887.git.lukas@wunner.de
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-mxic.c b/drivers/spi/spi-mxic.c
index 8c630ac..96b4182 100644 (file)
--- a/drivers/spi/spi-mxic.c
+++ b/drivers/spi/spi-mxic.c
@@ -529,7 +529,7 @@ static int mxic_spi_probe(struct platform_device *pdev)
        struct mxic_spi *mxic;
        int ret;
 
-       master = spi_alloc_master(&pdev->dev, sizeof(struct mxic_spi));
+       master = devm_spi_alloc_master(&pdev->dev, sizeof(struct mxic_spi));
        if (!master)
                return -ENOMEM;
 
@@ -574,15 +574,9 @@ static int mxic_spi_probe(struct platform_device *pdev)
        ret = spi_register_master(master);
        if (ret) {
                dev_err(&pdev->dev, "spi_register_master failed\n");
-               goto err_put_master;
+               pm_runtime_disable(&pdev->dev);
        }
 
-       return 0;
-
-err_put_master:
-       spi_master_put(master);
-       pm_runtime_disable(&pdev->dev);
-
        return ret;
 }