USB: usbmon: mask seconds properly in text API

The code does not implement the comment, so timestamps for long traces
become confusing instead of wrapping neatly as expected. This was actually
observed. Fortunately for API being in debugfs, we can just fix this instead
of staying bug-for-bug compatible. Double fortunately, the stable binary
API is not affected.

Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/mon/mon_text.c b/drivers/usb/mon/mon_text.c
index 16bfb61d24f9bd5f1a5bd61baa966ce24bbb6570..31c11888ec6a9e3bed63f56628761a98e193789d 100644 (file)
--- a/drivers/usb/mon/mon_text.c
+++ b/drivers/usb/mon/mon_text.c
@@ -180,7 +180,7 @@ static inline unsigned int mon_get_timestamp(void)
        unsigned int stamp;
 
        do_gettimeofday(&tval);
-       stamp = tval.tv_sec & 0xFFFF;   /* 2^32 = 4294967296. Limit to 4096s. */
+       stamp = tval.tv_sec & 0xFFF;    /* 2^32 = 4294967296. Limit to 4096s. */
        stamp = stamp * 1000000 + tval.tv_usec;
        return stamp;
 }