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Commit 973fbce6 authored by Bhuvanchandra DV's avatar Bhuvanchandra DV Committed by Mark Brown
Browse files

spi: spi-fsl-dspi: Remove usage of devm_kzalloc 



devm_* API was supposed to be used only in probe function call.
Memory is allocated at 'probe' and free automatically at 'remove'.
Usage of devm_* functions outside probe sometimes leads to memory leak.
Avoid using devm_kzalloc in dspi_setup_transfer and use kzalloc instead.
Also add the dspi_cleanup function to free the controller data upon
cleanup.

Acked-by: default avatarStefan Agner <stefan@agner.ch>
Signed-off-by: default avatarBhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
parent 97bf6af1

drivers/spi/spi-fsl-dspi.c

+12 −2
Original line number Diff line number Diff line
@@ -342,8 +342,7 @@ static int dspi_setup_transfer(struct spi_device *spi, struct spi_transfer *t) 
	/* Only alloc on first setup */

	chip = spi_get_ctldata(spi);

	if (chip == NULL) {

		chip = devm_kzalloc(&spi->dev, sizeof(struct chip_data),

				    GFP_KERNEL);

		chip = kzalloc(sizeof(struct chip_data), GFP_KERNEL);

		if (!chip)

			return -ENOMEM;

	}
@@ -382,6 +381,16 @@ static int dspi_setup(struct spi_device *spi) 
	return dspi_setup_transfer(spi, NULL);

}



static void dspi_cleanup(struct spi_device *spi)

{

	struct chip_data *chip = spi_get_ctldata((struct spi_device *)spi);



	dev_dbg(&spi->dev, "spi_device %u.%u cleanup\n",

			spi->master->bus_num, spi->chip_select);



	kfree(chip);

}



static irqreturn_t dspi_interrupt(int irq, void *dev_id)

{

	struct fsl_dspi *dspi = (struct fsl_dspi *)dev_id;
@@ -467,6 +476,7 @@ static int dspi_probe(struct platform_device *pdev) 
	dspi->bitbang.master->setup = dspi_setup;

	dspi->bitbang.master->dev.of_node = pdev->dev.of_node;



	master->cleanup = dspi_cleanup;

	master->mode_bits = SPI_CPOL | SPI_CPHA;

	master->bits_per_word_mask = SPI_BPW_MASK(4) | SPI_BPW_MASK(8) |

					SPI_BPW_MASK(16);