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Subject[PATCH] spi: spidev: use memdup_user
Date
Use memdup_user() helper instead of open-coding to simplify the code.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
---
drivers/spi/spidev.c | 10 +---------
1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c
index 9a2a79a..b00a88f 100644
--- a/drivers/spi/spidev.c
+++ b/drivers/spi/spidev.c
@@ -325,7 +325,6 @@ static struct spi_ioc_transfer *
spidev_get_ioc_message(unsigned int cmd, struct spi_ioc_transfer __user *u_ioc,
unsigned *n_ioc)
{
- struct spi_ioc_transfer *ioc;
u32 tmp;

/* Check type, command number and direction */
@@ -342,14 +341,7 @@ spidev_get_ioc_message(unsigned int cmd, struct spi_ioc_transfer __user *u_ioc,
return NULL;

/* copy into scratch area */
- ioc = kmalloc(tmp, GFP_KERNEL);
- if (!ioc)
- return ERR_PTR(-ENOMEM);
- if (__copy_from_user(ioc, u_ioc, tmp)) {
- kfree(ioc);
- return ERR_PTR(-EFAULT);
- }
- return ioc;
+ return memdup_user(u_ioc, tmp);
}

static long
--
2.9.3
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