| From: |
| Duncan Sands <duncan.sands@math.u-psud.fr> |
| To: |
| Greg KH <greg@kroah.com> |
| Subject: |
| [PATCH] USB ATM: robustify poll throttling |
| Date: |
| Thu, 23 Jun 2005 09:23:10 +0200 |
| Cc: |
| usbatm@lists.infradead.org, linux-usb-devel@lists.sourceforge.net |
No functional change, but less likely to break in the future.
Signed-off-by: Duncan Sands <baldrick@free.fr>
Index: Linux/drivers/usb/atm/speedtch.c
===================================================================
--- Linux.orig/drivers/usb/atm/speedtch.c 2005-06-23 09:02:45.508925765 +0200
+++ Linux/drivers/usb/atm/speedtch.c 2005-06-23 09:05:42.564761044 +0200
@@ -430,13 +430,11 @@
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]);
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