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irda: irda-usb: use msecs_to_jiffies for conversions 

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-20150522)

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nicholas Mc Guire 2015-05-23 14:46:30 +02:00 committed by David S. Miller
parent 6ae4ae8e51
commit bbfe0f37ae
1 changed files with 3 additions and 1 deletions
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4
drivers/net/irda/irda-usb.c
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@ -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;
}