linux/drivers/hwtracing/stm
Zhi Jin a1d75dad3a stm class: Fix an endless loop in channel allocation
There is a bug in the channel allocation logic that leads to an endless
loop when looking for a contiguous range of channels in a range with a
mixture of free and occupied channels. For example, opening three
consequtive channels, closing the first two and requesting 4 channels in
a row will trigger this soft lockup. The bug is that the search loop
forgets to skip over the range once it detects that one channel in that
range is occupied.

Restore the original intent to the logic by fixing the omission.

Signed-off-by: Zhi Jin <zhi.jin@intel.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Fixes: 7bd1d4093c ("stm class: Introduce an abstraction for System Trace Module devices")
CC: stable@vger.kernel.org # v4.4+
2019-02-21 17:44:18 +02:00
..
console.c stm class: Add SPDX GPL-2.0 header to replace GPLv2 boilerplate 2018-03-28 18:47:17 +03:00
core.c stm class: Fix an endless loop in channel allocation 2019-02-21 17:44:18 +02:00
dummy_stm.c stm class: Make dummy's master/channel ranges configurable 2018-03-28 18:47:18 +03:00
ftrace.c coresight: Moving framework and drivers to SPDX identifier 2018-05-14 16:19:59 +02:00
heartbeat.c stm class: heartbeat: Fix whitespace 2018-10-11 12:12:55 +02:00
Kconfig stm class: Add MIPI SyS-T protocol support 2018-10-11 12:12:54 +02:00
Makefile stm class: Add MIPI SyS-T protocol support 2018-10-11 12:12:54 +02:00
p_basic.c stm class: Factor out default framing protocol 2018-10-11 12:12:54 +02:00
p_sys-t.c stm class: p_sys-t: Add support for CLOCKSYNC packets 2018-10-11 12:12:54 +02:00
policy.c stm class: Fix a module refcount leak in policy creation error path 2018-12-19 20:21:06 +01:00
stm.h stm class: Add a helper for writing data packets 2018-10-11 12:12:54 +02:00