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| author | Chunyan Zhang <zhang.chunyan@linaro.org> | 2015-01-08 12:01:28 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-01-11 21:39:40 -0500 |
| commit | 9f61e309c54ac7f906422abd4ccebe10bee9debd (patch) | |
| tree | 8cc00d87d9352a06a8362ae6b60a462fb74d6395 /drivers/net/irda | |
| parent | 270d73c1c32c71e215f1c64e70be82063ec65005 (diff) | |
| download | lwn-9f61e309c54ac7f906422abd4ccebe10bee9debd.tar.gz lwn-9f61e309c54ac7f906422abd4ccebe10bee9debd.zip | |
irda: ali-ircc: Replace timeval with ktime_t
The ali ircc 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>
Diffstat (limited to 'drivers/net/irda')
| -rw-r--r-- | drivers/net/irda/ali-ircc.c | 11 | ||||
| -rw-r--r-- | drivers/net/irda/ali-ircc.h | 5 |
2 files changed, 5 insertions, 11 deletions
diff --git a/drivers/net/irda/ali-ircc.c b/drivers/net/irda/ali-ircc.c index 58f98f4de773..58ae11a14bb6 100644 --- a/drivers/net/irda/ali-ircc.c +++ b/drivers/net/irda/ali-ircc.c @@ -1462,17 +1462,12 @@ static netdev_tx_t ali_ircc_fir_hard_xmit(struct sk_buff *skb, if (mtt) { /* Check how much time we have used already */ - do_gettimeofday(&self->now); - - diff = self->now.tv_usec - self->stamp.tv_usec; + diff = ktime_us_delta(ktime_get(), self->stamp); /* self->stamp is set from ali_ircc_dma_receive_complete() */ pr_debug("%s(), ******* diff = %d *******\n", __func__, diff); - - if (diff < 0) - diff += 1000000; - + /* Check if the mtt is larger than the time we have * already used by all the protocol processing */ @@ -1884,7 +1879,7 @@ static int ali_ircc_dma_receive_complete(struct ali_ircc_cb *self) * 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(); skb = dev_alloc_skb(len+1); if (skb == NULL) diff --git a/drivers/net/irda/ali-ircc.h b/drivers/net/irda/ali-ircc.h index 0c8edb41bd0a..c2d9747a5108 100644 --- a/drivers/net/irda/ali-ircc.h +++ b/drivers/net/irda/ali-ircc.h @@ -22,7 +22,7 @@ #ifndef ALI_IRCC_H #define ALI_IRCC_H -#include <linux/time.h> +#include <linux/ktime.h> #include <linux/spinlock.h> #include <linux/pm.h> @@ -209,8 +209,7 @@ struct ali_ircc_cb { unsigned char rcvFramesOverflow; - struct timeval stamp; - struct timeval now; + ktime_t stamp; spinlock_t lock; /* For serializing operations */ |