[PATCH 5.10 649/717] spi: mxic: Dont leak SPI master in probe error path

Greg Kroah-Hartman
2020-12-28T14:32:54Z

From: Lukas Wunner <lukas@wunner.de>

commit cc53711b2191cf3b3210283ae89bf0abb98c70a3 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/spi/spi-mxic.c | 10 ++--------
1 file changed, 2 insertions(+), 8 deletions(-)

--- a/drivers/spi/spi-mxic.c
+++ b/drivers/spi/spi-mxic.c
@@ -529,7 +529,7 @@ static int mxic_spi_probe(struct platfor
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 platfor
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;
}