From f3537ea7b9c2f10397a8b68cd006981d7c615431 Mon Sep 17 00:00:00 2001 From: Atsushi Nemoto Date: Mon, 1 May 2006 12:16:17 -0700 Subject: [PATCH] [PATCH] genrtc: fix read on 64-bit platforms Fix genrtc's read() routine for 64-bit platforms. Current gen_rtc_read() stores 64bit integer and returns 8 even if an user tried to read a 32bit integer. Signed-off-by: Atsushi Nemoto Cc: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/char/genrtc.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/char/genrtc.c b/drivers/char/genrtc.c index d3a2bc3..588fca5 100644 --- a/drivers/char/genrtc.c +++ b/drivers/char/genrtc.c @@ -200,13 +200,13 @@ static ssize_t gen_rtc_read(struct file *file, char __user *buf, /* first test allows optimizer to nuke this case for 32-bit machines */ if (sizeof (int) != sizeof (long) && count == sizeof (unsigned int)) { unsigned int uidata = data; - retval = put_user(uidata, (unsigned long __user *)buf); + retval = put_user(uidata, (unsigned int __user *)buf) ?: + sizeof(unsigned int); } else { - retval = put_user(data, (unsigned long __user *)buf); + retval = put_user(data, (unsigned long __user *)buf) ?: + sizeof(unsigned long); } - if (!retval) - retval = sizeof(unsigned long); out: current->state = TASK_RUNNING; remove_wait_queue(&gen_rtc_wait, &wait); -- 2.7.4