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Subject[tip:x86/cpu] x86/intel_rdt: Trim whitespace while parsing schemata input
Commit-ID:  634b0e0491d6f6e882b922eb41c278d01a743bab
Gitweb: http://git.kernel.org/tip/634b0e0491d6f6e882b922eb41c278d01a743bab
Author: Vikas Shivappa <vikas.shivappa@linux.intel.com>
AuthorDate: Wed, 19 Apr 2017 16:50:03 -0700
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Thu, 20 Apr 2017 15:57:59 +0200

x86/intel_rdt: Trim whitespace while parsing schemata input

Schemata is displayed in tabular format which introduces some whitespace
to show data in a tabular format.

Writing back the same data fails as the parser does not handle the
whitespace.

Trim the leading and trailing whitespace before parsing.

Reported-by: Prakhya, Sai Praneeth <sai.praneeth.prakhya@intel.com>
Signed-off-by: Vikas Shivappa <vikas.shivappa@linux.intel.com>
Tested-by: Prakhya, Sai Praneeth <sai.praneeth.prakhya@intel.com>
Cc: fenghua.yu@intel.com
Cc: tony.luck@intel.com
Cc: ravi.v.shankar@intel.com
Cc: vikas.shivappa@intel.com
Link: http://lkml.kernel.org/r/1492645804-17465-3-git-send-email-vikas.shivappa@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

---
arch/x86/kernel/cpu/intel_rdt_schemata.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/intel_rdt_schemata.c b/arch/x86/kernel/cpu/intel_rdt_schemata.c
index 9467a00..e64b2cf 100644
--- a/arch/x86/kernel/cpu/intel_rdt_schemata.c
+++ b/arch/x86/kernel/cpu/intel_rdt_schemata.c
@@ -141,6 +141,7 @@ next:
id = strsep(&dom, "=");
if (!dom || kstrtoul(id, 10, &dom_id))
return -EINVAL;
+ dom = strim(dom);
list_for_each_entry(d, &r->domains, list) {
if (d->id == dom_id) {
if (r->parse_ctrlval(dom, r, d))
@@ -214,7 +215,7 @@ ssize_t rdtgroup_schemata_write(struct kernfs_open_file *of,
dom->have_new_ctrl = false;

while ((tok = strsep(&buf, "\n")) != NULL) {
- resname = strsep(&tok, ":");
+ resname = strim(strsep(&tok, ":"));
if (!tok) {
ret = -EINVAL;
goto out;
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