Author: n_hibma
Date: Sun Nov 7 15:36:07 2010
New Revision: 214919
URL: http://svn.freebsd.org/changeset/base/214919
Log:
Bugfix: Set the bit that marks a device number in use.
This would cause a panic when disconnecting the second serial device.
Submitted by: Lucius Windschuh
Modified:
head/sys/dev/usb/serial/usb_serial.c
Modified: head/sys/dev/usb/serial/usb_serial.c
==============================================================================
--- head/sys/dev/usb/serial/usb_serial.c Sun Nov 7 14:39:40 2010
(r214918)
+++ head/sys/dev/usb/serial/usb_serial.c Sun Nov 7 15:36:07 2010
(r214919)
@@ -200,9 +200,12 @@ ucom_unit_alloc(void)
mtx_lock(&ucom_bitmap_mtx);
- for (unit = 0; unit < UCOM_UNIT_MAX; unit++)
- if ((ucom_bitmap[unit / 8] & (1 << (unit % 8))) == 0)
+ for (unit = 0; unit < UCOM_UNIT_MAX; unit++) {
+ if ((ucom_bitmap[unit / 8] & (1 << (unit % 8))) == 0) {
+ ucom_bitmap[unit / 8] |= (1 << (unit % 8));
break;
+ }
+ }
mtx_unlock(&ucom_bitmap_mtx);
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