[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 <anemo@mba.ocn.ne.jp>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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 @@
/* 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);