Messages in this thread Patch in this message | | | From | Bamvor Zhang Jian <> | Subject | [RFC PATCH v2 3/4] ppdev: add compat ioctl | Date | Mon, 29 Jun 2015 22:23:26 +0800 |
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Add compat ioctl in ppdev in order to solve the y2038 issue in later patch. This patch simply add pp_do_ioctl to compat_ioctl, because I found that all the ioctl access the arg as a pointer.
Signed-off-by: Bamvor Zhang Jian <bamvor.zhangjian@linaro.org> --- drivers/char/ppdev.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/char/ppdev.c b/drivers/char/ppdev.c index ae0b42b..9207658 100644 --- a/drivers/char/ppdev.c +++ b/drivers/char/ppdev.c @@ -69,6 +69,7 @@ #include <linux/ppdev.h> #include <linux/mutex.h> #include <linux/uaccess.h> +#include <linux/compat.h> #define PP_VERSION "ppdev: user-space parallel port driver" #define CHRDEV "ppdev" @@ -635,6 +636,11 @@ static long pp_ioctl(struct file *file, unsigned int cmd, unsigned long arg) return ret; } +static long pp_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) +{ + return pp_ioctl(file, cmd, (unsigned long)compat_ptr(arg)); +} + static int pp_open (struct inode * inode, struct file * file) { unsigned int minor = iminor(inode); @@ -744,6 +750,9 @@ 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, }; -- 2.1.4
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