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[PATCH] USB ATM: robustify poll throttling 

No functional change, but less likely to break in the future.

Signed-off-by: Duncan Sands <baldrick@free.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Duncan Sands 2005-06-23 09:23:10 +02:00 committed by Greg Kroah-Hartman
parent 322a95bc8e
commit cd5c08fb7b
1 changed files with 2 additions and 4 deletions
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6
drivers/usb/atm/speedtch.c
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@ -430,13 +430,11 @@ static void speedtch_check_status(struct speedtch_instance_data *instance)
ret = speedtch_read_status(instance);
if (ret < 0) {
atm_warn(usbatm, "error %d fetching device status\n", ret);
if (instance->poll_delay < MAX_POLL_DELAY)
instance->poll_delay *= 2;
instance->poll_delay = min(2 * instance->poll_delay, MAX_POLL_DELAY);
return;
}
if (instance->poll_delay > MIN_POLL_DELAY)
instance->poll_delay /= 2;
instance->poll_delay = max(instance->poll_delay / 2, MIN_POLL_DELAY);
atm_dbg(usbatm, "%s: line state %02x\n", __func__, buf[OFFSET_7]);