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| author | Chunyan Zhang <zhang.chunyan@linaro.org> | 2015-01-08 12:01:29 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-01-11 21:39:40 -0500 |
| commit | ca98278a14b76916cd09c2c899c21c29a0748d15 (patch) | |
| tree | 85785e1de3a8827e1ea8b1d441098d07788b5774 | |
| parent | 9f61e309c54ac7f906422abd4ccebe10bee9debd (diff) | |
| download | op-kernel-dev-ca98278a14b76916cd09c2c899c21c29a0748d15.zip op-kernel-dev-ca98278a14b76916cd09c2c899c21c29a0748d15.tar.gz | |
irda: irda-usb: Replace timeval with ktime_t
The irda usb driver uses 'timeval', which we try to remove in the kernel
because all 32-bit time types will break in the year 2038.
This patch also changes do_gettimeofday() to ktime_get() accordingly,
since ktime_get returns a ktime_t, but do_gettimeofday returns a
struct timeval, and the other reason is that ktime_get() uses
the monotonic clock.
This patch uses ktime_us_delta to get the elapsed time, and in this
way it no longer needs to check for the overflow, because
ktime_us_delta returns time difference of microsecond.
Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/irda/irda-usb.c | 10 | ||||
| -rw-r--r-- | drivers/net/irda/irda-usb.h | 5 |
2 files changed, 4 insertions, 11 deletions
diff --git a/drivers/net/irda/irda-usb.c b/drivers/net/irda/irda-usb.c index 48b2f9a..f6c9163 100644 --- a/drivers/net/irda/irda-usb.c +++ b/drivers/net/irda/irda-usb.c @@ -495,18 +495,12 @@ static netdev_tx_t irda_usb_hard_xmit(struct sk_buff *skb, mtt = irda_get_mtt(skb); if (mtt) { int diff; - do_gettimeofday(&self->now); - diff = self->now.tv_usec - self->stamp.tv_usec; + diff = ktime_us_delta(ktime_get(), self->stamp); #ifdef IU_USB_MIN_RTT /* Factor in USB delays -> Get rid of udelay() that * would be lost in the noise - Jean II */ diff += IU_USB_MIN_RTT; #endif /* IU_USB_MIN_RTT */ - /* If the usec counter did wraparound, the diff will - * go negative (tv_usec is a long), so we need to - * correct it by one second. Jean II */ - if (diff < 0) - diff += 1000000; /* Check if the mtt is larger than the time we have * already used by all the protocol processing @@ -869,7 +863,7 @@ static void irda_usb_receive(struct urb *urb) * reduce the min turn time a bit since we will know * how much time we have used for protocol processing */ - do_gettimeofday(&self->stamp); + self->stamp = ktime_get(); /* Check if we need to copy the data to a new skb or not. * For most frames, we use ZeroCopy and pass the already diff --git a/drivers/net/irda/irda-usb.h b/drivers/net/irda/irda-usb.h index 58ddb52..8ac389f 100644 --- a/drivers/net/irda/irda-usb.h +++ b/drivers/net/irda/irda-usb.h @@ -29,7 +29,7 @@ * *****************************************************************************/ -#include <linux/time.h> +#include <linux/ktime.h> #include <net/irda/irda.h> #include <net/irda/irda_device.h> /* struct irlap_cb */ @@ -157,8 +157,7 @@ struct irda_usb_cb { char *speed_buff; /* Buffer for speed changes */ char *tx_buff; - struct timeval stamp; - struct timeval now; + ktime_t stamp; spinlock_t lock; /* For serializing Tx operations */ |
