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serial: max3107: Fix memory leaks when returning on error 

Fix memory leaks in max3107_probe() when returning on error.

Signed-off-by: Davidlohr Bueso <dave@gnu.org>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Davidlohr Bueso 2010-09-13 12:08:11 -04:00 committed by Greg Kroah-Hartman
parent 91efa75ce1
commit 68707539df
1 changed files with 25 additions and 9 deletions
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34
drivers/serial/max3107.c
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@ -986,12 +986,14 @@ int max3107_probe(struct spi_device *spi, struct max3107_plat *pdata)
s->rxbuf = kzalloc(sizeof(u16) * (MAX3107_RX_FIFO_SIZE+2), GFP_KERNEL);
if (!s->rxbuf) {
pr_err("Allocating RX buffer failed\n");
return -ENOMEM;
retval = -ENOMEM;
goto err_free4;
}
s->rxstr = kzalloc(sizeof(u8) * MAX3107_RX_FIFO_SIZE, GFP_KERNEL);
if (!s->rxstr) {
pr_err("Allocating RX buffer failed\n");
return -ENOMEM;
retval = -ENOMEM;
goto err_free3;
}
/* SPI Tx buffer
* SPI transfer buffer
@ -1002,7 +1004,8 @@ int max3107_probe(struct spi_device *spi, struct max3107_plat *pdata)
s->txbuf = kzalloc(sizeof(u16) * MAX3107_TX_FIFO_SIZE + 3, GFP_KERNEL);
if (!s->txbuf) {
pr_err("Allocating TX buffer failed\n");
return -ENOMEM;
retval = -ENOMEM;
goto err_free2;
}
/* Initialize shared data lock */
spin_lock_init(&s->data_lock);
@ -1021,13 +1024,15 @@ int max3107_probe(struct spi_device *spi, struct max3107_plat *pdata)
buf[0] = MAX3107_REVID_REG;
if (max3107_rw(s, (u8 *)buf, (u8 *)buf, 2)) {
dev_err(&s->spi->dev, "SPI transfer for REVID read failed\n");
return -EIO;
retval = -EIO;
goto err_free1;
}
if ((buf[0] & MAX3107_SPI_RX_DATA_MASK) != MAX3107_REVID1 &&
(buf[0] & MAX3107_SPI_RX_DATA_MASK) != MAX3107_REVID2) {
dev_err(&s->spi->dev, "REVID %x does not match\n",
(buf[0] & MAX3107_SPI_RX_DATA_MASK));
return -ENODEV;
retval = -ENODEV;
goto err_free1;
}
/* Disable all interrupts */
@ -1047,7 +1052,8 @@ int max3107_probe(struct spi_device *spi, struct max3107_plat *pdata)
/* Perform SPI transfer */
if (max3107_rw(s, (u8 *)buf, NULL, 4)) {
dev_err(&s->spi->dev, "SPI transfer for init failed\n");
return -EIO;
retval = -EIO;
goto err_free1;
}
/* Register UART driver */
@ -1055,7 +1061,7 @@ int max3107_probe(struct spi_device *spi, struct max3107_plat *pdata)
retval = uart_register_driver(&max3107_uart_driver);
if (retval) {
dev_err(&s->spi->dev, "Registering UART driver failed\n");
return retval;
goto err_free1;
}
driver_registered = 1;
}
@ -1074,13 +1080,13 @@ int max3107_probe(struct spi_device *spi, struct max3107_plat *pdata)
retval = uart_add_one_port(&max3107_uart_driver, &s->port);
if (retval < 0) {
dev_err(&s->spi->dev, "Adding UART port failed\n");
return retval;
goto err_free1;
}
if (pdata->configure) {
retval = pdata->configure(s);
if (retval < 0)
return retval;
goto err_free1;
}
/* Go to suspend mode */
@ -1088,6 +1094,16 @@ int max3107_probe(struct spi_device *spi, struct max3107_plat *pdata)
pdata->hw_suspend(s, 1);
return 0;
err_free1:
kfree(s->txbuf);
err_free2:
kfree(s->rxstr);
err_free3:
kfree(s->rxbuf);
err_free4:
kfree(s);
return retval;
}
EXPORT_SYMBOL_GPL(max3107_probe);