kernel/linux.git/include/trace/events/clk.h, branch v4.4.151Linux kernel stable tree (mirror)https://git.radix-linux.su/kernel/linux.git/atom?h=v4.4.1512018-02-25T10:03:41+00:00clk: fix a panic error caused by accessing NULL pointer2018-02-25T10:03:41+00:00Cai Licai.li@spreadtrum.com2017-11-21T09:24:38+00:00urn:sha1:dc97e9ecd86d7e02cd5449d7aa43810346693eef
[ Upstream commit 975b820b6836b6b6c42fb84cd2e772e2b41bca67 ]
In some cases the clock parent would be set NULL when doing re-parent,
it will cause a NULL pointer accessing if clk_set trace event is
enabled.
This patch sets the parent as "none" if the input parameter is NULL.
Fixes: dfc202ead312 (clk: Add tracepoints for hardware operations)
Signed-off-by: Cai Li <cai.li@spreadtrum.com>
Signed-off-by: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
clk: Add tracepoints for hardware operations2015-03-12T19:18:51+00:00Stephen Boydsboyd@codeaurora.org2015-02-02T22:37:41+00:00urn:sha1:dfc202ead3123988793ac1160849676000b77ee4
It's useful to have tracepoints around operations that change the
hardware state so that we can debug clock hardware performance
and operations. Four basic types of events are supported: on/off
events for enable, disable, prepare, unprepare that only record
an event and a clock name, rate changing events for
clk_set_{min_,max_}rate{_range}(), phase changing events for
clk_set_phase() and parent changing events for clk_set_parent().
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Michael Turquette <mturquette@linaro.org>