PCI/ASPM: Convert to use sysfs_match_string() helper

The sysfs_match_string() helper returns index of the matching string in an
array.  Use it in pcie_aspm_set_policy() to simplify the code.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
[bhelgaas: squash sysfs_match_string() fix into original patch for issue
Reported-by: Heiner Kallweit <hkallweit1@gmail.com>]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index c687c81..5326916 100644 (file)
--- a/drivers/pci/pcie/aspm.c
+++ b/drivers/pci/pcie/aspm.c
@@ -1127,11 +1127,9 @@ static int pcie_aspm_set_policy(const char *val,
 
        if (aspm_disabled)
                return -EPERM;
-       for (i = 0; i < ARRAY_SIZE(policy_str); i++)
-               if (!strncmp(val, policy_str[i], strlen(policy_str[i])))
-                       break;
-       if (i >= ARRAY_SIZE(policy_str))
-               return -EINVAL;
+       i = sysfs_match_string(policy_str, val);
+       if (i < 0)
+               return i;
        if (i == aspm_policy)
                return 0;