diff mbox

[2/2] ppdev: add support for compat ioctl

Message ID 1449641498-5761-3-git-send-email-bamvor.zhangjian@linaro.org
State New
Headers show

Commit Message

Bamvor Zhang Jian Dec. 9, 2015, 6:11 a.m. UTC 
The arg of ioctl in ppdev is the pointer of integer except the
timeval in PPSETTIME, PPGETTIME. Different size of timeval
is already supported by the previous patches. So, it is safe
to add compat support.

Signed-off-by: Bamvor Jian Zhang <bamvor.zhangjian@linaro.org>

---
 drivers/char/ppdev.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

-- 
2.1.4

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diff mbox

Patch

diff --git a/drivers/char/ppdev.c b/drivers/char/ppdev.c
index 19a4d6e..7390166 100644
--- a/drivers/char/ppdev.c
+++ b/drivers/char/ppdev.c
@@ -670,6 +670,14 @@  static long pp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 	return ret;
 }
 
+#ifdef CONFIG_COMPAT
+static long pp_compat_ioctl(struct file *file, unsigned int cmd,
+		unsigned long arg)
+{
+	return pp_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
+}
+#endif
+
 static int pp_open (struct inode * inode, struct file * file)
 {
 	unsigned int minor = iminor(inode);
@@ -779,6 +787,9 @@  static const struct file_operations pp_fops = {
 	.write		= pp_write,
 	.poll		= pp_poll,
 	.unlocked_ioctl	= pp_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl   = pp_compat_ioctl,
+#endif
 	.open		= pp_open,
 	.release	= pp_release,
 };