From: Geliang Tang <geliangtang@gmail.com>
Date: Sat, 6 May 2017 23:42:17 +0800
Subject: spi: spidev: use memdup_user
Git-commit: f7929436a286ca31f0365a7013de968017f76818
Patch-mainline: v4.13-rc1
References: fate#326572
Use memdup_user() helper instead of open-coding to simplify the code.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.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 3b570018705c..d4d2d8d9f3e7 100644
--- a/drivers/spi/spidev.c
+++ b/drivers/spi/spidev.c
@@ -324,7 +324,6 @@ 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 */
@@ -341,14 +340,7 @@ 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
--
2.11.0