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| author | Tina Ruchandani <ruchandani.tina@gmail.com> | 2015-10-29 10:16:57 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-11-19 14:31:45 +0300 |
| commit | dd4c22a61e0bdaf84202fcf84cb8f75ed7bb3552 (patch) | |
| tree | 7cef248203e463111c0dae2ff1cb2d47aae528d8 /drivers/media/rc/streamzap.c | |
| parent | 8c47311d34eccedb06bc60fc9435a53bd4aff392 (diff) | |
| download | linux-dd4c22a61e0bdaf84202fcf84cb8f75ed7bb3552.tar.xz | |
[media] rc-core: Remove 'struct timeval' usage
streamzap uses 'struct timeval' to store the start time of a signal for
gap tracking. struct timeval uses a 32-bit seconds representation which
will overflow in year 2038 and beyond. Replace struct timeval with ktime_t
which uses a 64-bit seconds representation and is 2038 safe. This patch
uses ktime_get_real() preserving the use of wall-clock time in the
original code.
Signed-off-by: Tina Ruchandani <ruchandani.tina@gmail.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/rc/streamzap.c')
| -rw-r--r-- | drivers/media/rc/streamzap.c | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/drivers/media/rc/streamzap.c b/drivers/media/rc/streamzap.c index 5a17cb88ff27..815243c65bc3 100644 --- a/drivers/media/rc/streamzap.c +++ b/drivers/media/rc/streamzap.c @@ -34,6 +34,7 @@ #include <linux/device.h> #include <linux/module.h> #include <linux/slab.h> +#include <linux/ktime.h> #include <linux/usb.h> #include <linux/usb/input.h> #include <media/rc-core.h> @@ -96,8 +97,8 @@ struct streamzap_ir { /* sum of signal lengths received since signal start */ unsigned long sum; /* start time of signal; necessary for gap tracking */ - struct timeval signal_last; - struct timeval signal_start; + ktime_t signal_last; + ktime_t signal_start; bool timeout_enabled; char name[128]; @@ -136,20 +137,18 @@ static void sz_push_full_pulse(struct streamzap_ir *sz, DEFINE_IR_RAW_EVENT(rawir); if (sz->idle) { - long deltv; + int delta; sz->signal_last = sz->signal_start; - do_gettimeofday(&sz->signal_start); + sz->signal_start = ktime_get_real(); - deltv = sz->signal_start.tv_sec - sz->signal_last.tv_sec; + delta = ktime_us_delta(sz->signal_start, sz->signal_last); rawir.pulse = false; - if (deltv > 15) { + if (delta > (15 * USEC_PER_SEC)) { /* really long time */ rawir.duration = IR_MAX_DURATION; } else { - rawir.duration = (int)(deltv * 1000000 + - sz->signal_start.tv_usec - - sz->signal_last.tv_usec); + rawir.duration = delta; rawir.duration -= sz->sum; rawir.duration = US_TO_NS(rawir.duration); rawir.duration = (rawir.duration > IR_MAX_DURATION) ? @@ -428,7 +427,7 @@ static int streamzap_probe(struct usb_interface *intf, sz->max_timeout = US_TO_NS(SZ_TIMEOUT * SZ_RESOLUTION); #endif - do_gettimeofday(&sz->signal_start); + sz->signal_start = ktime_get_real(); /* Complete final initialisations */ usb_fill_int_urb(sz->urb_in, usbdev, pipe, sz->buf_in, |