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>

diff --git a/arch/x86/kernel/cpu/intel_rdt_schemata.c b/arch/x86/kernel/cpu/intel_rdt_schemata.c
index 9467a00c947b2bdccd7cc39ecba0812b2d79c332..e64b2cf1c428b17c6bca7d306f405c6f852b0ff5 100644 (file)
--- 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;