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authorBernhard Walle <walle@corscience.de>2011-02-03 09:37:18 +0100
committerGrant Likely <grant.likely@secretlab.ca>2011-02-03 09:55:43 -0700
commit7d48ec3698e7b747efa744fd340b0f2d1dbfd3e0 (patch)
tree821683241a3715d558d60a666d8b8b560114008c /drivers/spi/spidev.c
parent9dabb3f3269d042908bf1f4e685413c39cc8c373 (diff)
downloadlinux-linaro-stable-7d48ec3698e7b747efa744fd340b0f2d1dbfd3e0.tar.gz
spi/spidev: Add 32 bit compat ioctl()
Add the compat_ioctl for operations on /dev/spi* so that 32 bit userspace applications can access SPI. As far as I can see all data structure are already prepared for that, so no additional conversion has to be done. My use case is MIPS with N32 userspace ABI and toolchain, and that was also the platform where I tested it successfully (Cavium Octeon). Signed-off-by: Bernhard Walle <walle@corscience.de> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/spi/spidev.c')
-rw-r--r--drivers/spi/spidev.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c
index 603428213d21..d9fd86211365 100644
--- a/drivers/spi/spidev.c
+++ b/drivers/spi/spidev.c
@@ -30,6 +30,7 @@
#include <linux/errno.h>
#include <linux/mutex.h>
#include <linux/slab.h>
+#include <linux/compat.h>
#include <linux/spi/spi.h>
#include <linux/spi/spidev.h>
@@ -471,6 +472,16 @@ spidev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
return retval;
}
+#ifdef CONFIG_COMPAT
+static long
+spidev_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ return spidev_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
+}
+#else
+#define spidev_compat_ioctl NULL
+#endif /* CONFIG_COMPAT */
+
static int spidev_open(struct inode *inode, struct file *filp)
{
struct spidev_data *spidev;
@@ -543,6 +554,7 @@ static const struct file_operations spidev_fops = {
.write = spidev_write,
.read = spidev_read,
.unlocked_ioctl = spidev_ioctl,
+ .compat_ioctl = spidev_compat_ioctl,
.open = spidev_open,
.release = spidev_release,
.llseek = no_llseek,