From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Fri, 4 May 2018 19:19:25 +0000 (+0300)
Subject: intel_th: pti: Use sysfs_match_string() helper
X-Git-Tag: v5.1-rc1~147^2~44^2~3
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=1d2ef028bf9a9272c658782d9c75f60658770ba4;p=linux-2.6-block.git

intel_th: pti: Use sysfs_match_string() helper

Use sysfs_match_string() helper instead of open coded variant.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
---

diff --git a/drivers/hwtracing/intel_th/pti.c b/drivers/hwtracing/intel_th/pti.c
index 56694339cb06..0da6b787f553 100644
--- a/drivers/hwtracing/intel_th/pti.c
+++ b/drivers/hwtracing/intel_th/pti.c
@@ -272,19 +272,17 @@ static ssize_t lpp_dest_store(struct device *dev, struct device_attribute *attr,
 			      const char *buf, size_t size)
 {
 	struct pti_device *pti = dev_get_drvdata(dev);
-	ssize_t ret = -EINVAL;
 	int i;
 
-	for (i = 0; i < ARRAY_SIZE(lpp_dest_str); i++)
-		if (sysfs_streq(buf, lpp_dest_str[i]))
-			break;
+	i = sysfs_match_string(lpp_dest_str, buf);
+	if (i < 0)
+		return i;
 
-	if (i < ARRAY_SIZE(lpp_dest_str) && pti->lpp_dest_mask & BIT(i)) {
-		pti->lpp_dest = i;
-		ret = size;
-	}
+	if (!(pti->lpp_dest_mask & BIT(i)))
+		return -EINVAL;
 
-	return ret;
+	pti->lpp_dest = i;
+	return size;
 }
 
 static DEVICE_ATTR_RW(lpp_dest);