The sysfs file for the libata error handling has multiple issues in the way it prints time stamps:
* it prints a 9-digit nanosecond value using a %06lu format string, which drops some leading zeroes * it converts a 64-bit jiffes value to a timespec using jiffies_to_timespec(), which takes a 'long' argument, so the result is wrong after a jiffies overflow (49 days). * we try to avoid using timespec because that generally overflows in 2038, although this particular usage is ok.
This replaces the jiffies_to_timespec call with an open-coded implementation that gets it right.
Signed-off-by: Arnd Bergmann arnd@arndb.de --- drivers/ata/libata-transport.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/ata/libata-transport.c b/drivers/ata/libata-transport.c index e2d94972962d..7ef16c085058 100644 --- a/drivers/ata/libata-transport.c +++ b/drivers/ata/libata-transport.c @@ -495,12 +495,13 @@ struct ata_show_ering_arg { static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg) { struct ata_show_ering_arg* arg = void_arg; - struct timespec time; + u64 seconds; + u32 rem;
- jiffies_to_timespec(ent->timestamp,&time); + seconds = div_u64_rem(ent->timestamp, HZ, &rem); arg->written += sprintf(arg->buf + arg->written, - "[%5lu.%06lu]", - time.tv_sec, time.tv_nsec); + "[%5llu.%09lu]", seconds, + rem * NSEC_PER_SEC / HZ); arg->written += get_ata_err_names(ent->err_mask, arg->buf + arg->written); return 0;