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spi: fsl-dspi: Remove possible memory leak of 'chip'

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Move the check for spi->bits_per_word
before allocation, to avoid memory leak.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Bhuvanchandra DV 2015-01-31 22:03:25 +05:30 committed by Mark Brown
parent 9298bc7273
commit ceadfd8de0
1 changed files with 7 additions and 6 deletions
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13
drivers/spi/spi-fsl-dspi.c
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@ -347,6 +347,13 @@ static int dspi_setup(struct spi_device *spi)
struct fsl_dspi *dspi = spi_master_get_devdata(spi->master);
unsigned char br = 0, pbr = 0, fmsz = 0;
if ((spi->bits_per_word >= 4) && (spi->bits_per_word <= 16)) {
fmsz = spi->bits_per_word - 1;
} else {
pr_err("Invalid wordsize\n");
return -ENODEV;
}
/* Only alloc on first setup */
chip = spi_get_ctldata(spi);
if (chip == NULL) {
@ -357,12 +364,6 @@ static int dspi_setup(struct spi_device *spi)
chip->mcr_val = SPI_MCR_MASTER | SPI_MCR_PCSIS |
SPI_MCR_CLR_TXF | SPI_MCR_CLR_RXF;
if ((spi->bits_per_word >= 4) && (spi->bits_per_word <= 16)) {
fmsz = spi->bits_per_word - 1;
} else {
pr_err("Invalid wordsize\n");
return -ENODEV;
}
chip->void_write_data = 0;