Messages in this thread Patch in this message | | | From | Nicholas Mc Guire <> | Subject | [PATCH] irda: irda-usb: use msecs_to_jiffies for conversions | Date | Tue, 19 May 2015 12:51:51 +0200 |
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API compliance scanning with coccinelle flagged:
Converting milliseconds to jiffies by "val * HZ / 1000" is technically is not a clean solution as it does not handle all corner cases correctly. By changing the conversion to use msecs_to_jiffies(val) conversion is correct in all cases.
in the current code: mod_timer(&self->rx_defer_timer, jiffies + (10 * HZ / 1000)); for HZ < 100 (e.g. CONFIG_HZ == 64|32 in alpha) this effectively results in no delay at all.
Patch was compile tested for x86_64_defconfig (implies CONFIG_USB_IRDA=m)
Patch is against 4.1-rc4 (localversion-next is -next-20150519)
Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org> --- drivers/net/irda/irda-usb.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/irda/irda-usb.c b/drivers/net/irda/irda-usb.c index f6c9163..f3e4563 100644 --- a/drivers/net/irda/irda-usb.c +++ b/drivers/net/irda/irda-usb.c @@ -848,7 +848,9 @@ static void irda_usb_receive(struct urb *urb) * Jean II */ self->rx_defer_timer.function = irda_usb_rx_defer_expired; self->rx_defer_timer.data = (unsigned long) urb; - mod_timer(&self->rx_defer_timer, jiffies + (10 * HZ / 1000)); + mod_timer(&self->rx_defer_timer, + jiffies + (msecs_to_jiffies(10))); + return; } -- 1.7.10.4
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