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USB: usbmon: Use 64bit timestamp for mon_bin_hdr 

struct mon_bin_hdr allows for a 64-bit seconds timestamp. The code
currently uses 'struct timeval' to populate the timestamp in mon_bin_hdr,
which has a 32-bit seconds field and will overflow in year 2038 and beyond.
This patch replaces 'struct timeval' with 'struct timespec64' which is
y2038 safe. This patch is part of a larger attempt to remove instances
of struct timeval and other 32-bit timekeeping (time_t, struct timespec)
from the kernel.

Signed-off-by: Tina Ruchandani <ruchandani.tina@gmail.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tina Ruchandani 2015-10-29 22:44:31 -07:00 committed by Greg Kroah-Hartman
parent 18fc4ebdc7
commit 8ab0f723af
1 changed files with 9 additions and 8 deletions
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17
drivers/usb/mon/mon_bin.c
View File

@ -18,6 +18,7 @@
#include <linux/mm.h>
#include <linux/scatterlist.h>
#include <linux/slab.h>
#include <linux/time64.h>
#include <asm/uaccess.h>
@ -92,8 +93,8 @@ struct mon_bin_hdr {
unsigned short busnum; /* Bus number */
char flag_setup;
char flag_data;
s64 ts_sec; /* gettimeofday */
s32 ts_usec; /* gettimeofday */
s64 ts_sec; /* getnstimeofday64 */
s32 ts_usec; /* getnstimeofday64 */
int status;
unsigned int len_urb; /* Length of data (submitted or actual) */
unsigned int len_cap; /* Delivered length */
@ -483,7 +484,7 @@ static void mon_bin_event(struct mon_reader_bin *rp, struct urb *urb,
char ev_type, int status)
{
const struct usb_endpoint_descriptor *epd = &urb->ep->desc;
struct timeval ts;
struct timespec64 ts;
unsigned long flags;
unsigned int urb_length;
unsigned int offset;
@ -494,7 +495,7 @@ static void mon_bin_event(struct mon_reader_bin *rp, struct urb *urb,
struct mon_bin_hdr *ep;
char data_tag = 0;
do_gettimeofday(&ts);
getnstimeofday64(&ts);
spin_lock_irqsave(&rp->b_lock, flags);
@ -568,7 +569,7 @@ static void mon_bin_event(struct mon_reader_bin *rp, struct urb *urb,
ep->busnum = urb->dev->bus->busnum;
ep->id = (unsigned long) urb;
ep->ts_sec = ts.tv_sec;
ep->ts_usec = ts.tv_usec;
ep->ts_usec = ts.tv_nsec / NSEC_PER_USEC;
ep->status = status;
ep->len_urb = urb_length;
ep->len_cap = length + lendesc;
@ -629,12 +630,12 @@ static void mon_bin_complete(void *data, struct urb *urb, int status)
static void mon_bin_error(void *data, struct urb *urb, int error)
{
struct mon_reader_bin *rp = data;
struct timeval ts;
struct timespec64 ts;
unsigned long flags;
unsigned int offset;
struct mon_bin_hdr *ep;
do_gettimeofday(&ts);
getnstimeofday64(&ts);
spin_lock_irqsave(&rp->b_lock, flags);
@ -656,7 +657,7 @@ static void mon_bin_error(void *data, struct urb *urb, int error)
ep->busnum = urb->dev->bus->busnum;
ep->id = (unsigned long) urb;
ep->ts_sec = ts.tv_sec;
ep->ts_usec = ts.tv_usec;
ep->ts_usec = ts.tv_nsec / NSEC_PER_USEC;
ep->status = error;
ep->flag_setup = '-';