[PATCH 5.19 0200/1157] spi: spi-altera-dfl: Fix an error handling path

Greg Kroah-Hartman
2022-08-15T22:42:21Z

From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

[ Upstream commit 8e3ca32f46994e74b7f43c57731150b2aedb2630 ]

The spi_alloc_master() call is not undone in all error handling paths.
Moreover, there is no .remove function to release the allocated memory.

In order to fix both this issues, switch to devm_spi_alloc_master().

This allows further simplification of the probe.

Fixes: ba2fc167e944 ("spi: altera: Add DFL bus driver for Altera API Controller")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/0607bb59f4073f86abe5c585d35245aef0b045c6.1653805901.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/spi/spi-altera-dfl.c | 14 +++++---------
1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/drivers/spi/spi-altera-dfl.c b/drivers/spi/spi-altera-dfl.c
index ca40923258af..596e181ae136 100644
--- a/drivers/spi/spi-altera-dfl.c
+++ b/drivers/spi/spi-altera-dfl.c
@@ -128,9 +128,9 @@ static int dfl_spi_altera_probe(struct dfl_device *dfl_dev)
struct spi_master *master;
struct altera_spi *hw;
void __iomem *base;
- int err = -ENODEV;
+ int err;

- master = spi_alloc_master(dev, sizeof(struct altera_spi));
+ master = devm_spi_alloc_master(dev, sizeof(struct altera_spi));
if (!master)
return -ENOMEM;

@@ -159,10 +159,9 @@ static int dfl_spi_altera_probe(struct dfl_device *dfl_dev)
altera_spi_init_master(master);

err = devm_spi_register_master(dev, master);
- if (err) {
- dev_err(dev, "%s failed to register spi master %d\n", __func__, err);
- goto exit;
- }
+ if (err)
+ return dev_err_probe(dev, err, "%s failed to register spi master\n",
+ __func__);

if (dfl_dev->revision == FME_FEATURE_REV_MAX10_SPI_N5010)
strscpy(board_info.modalias, "m10-n5010", SPI_NAME_SIZE);
@@ -179,9 +178,6 @@ static int dfl_spi_altera_probe(struct dfl_device *dfl_dev)
}

return 0;
-exit:
- spi_master_put(master);
- return err;
}

static const struct dfl_device_id dfl_spi_altera_ids[] = {
--
2.35.1