shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-09 04:10:18 +09:00
Code Issues Packages Projects Releases Wiki Activity

stm class: Support devices with multiple instances

Browse Source 
[ Upstream commit 59be422e4c ]

By convention, the name of the stm policy directory in configfs consists of
the device name to which it applies and the actual policy name, separated
by a dot. Now, some devices already have dots in their names that separate
name of the actual device from its instance identifier. Such devices will
result in two (or more, who can tell) dots in the policy directory name.

Existing policy code, however, will treat the first dot as the one that
separates device name from policy name, therefore failing the above case.

This patch makes the last dot in the directory name be the separator, thus
prohibiting dots from being used in policy names.

Suggested-by: Chunyan Zhang <zhang.chunyan@linaro.org>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Alexander Shishkin
2016-02-15 19:12:02 +02:00
committed by Greg Kroah-Hartman
parent ffb2f3f86b
commit 65b52bbc35
1 changed files with 4 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/hwtracing/stm/policy.c
View File

@@ -332,10 +332,11 @@ stp_policies_make(struct config_group *group, const char *name)
/*
* node must look like <device_name>.<policy_name>, where
* <device_name> is the name of an existing stm device and
* <policy_name> is an arbitrary string
* <device_name> is the name of an existing stm device; may
* contain dots;
* <policy_name> is an arbitrary string; may not contain dots
*/
p = strchr(devname, '.');
p = strrchr(devname, '.');
if (!p) {
kfree(devname);
return ERR_PTR(-EINVAL);