libsas: remove private hex2bin() implementation

The function sas_parse_addr() could be easily substituted by hex2bin() which is in kernel library code.

Cc Christoph Hellwig <[email protected]>

Signed-off-by Andy Shevchenko <[email protected]>

---
  drivers/scsi/libsas/sas_scsi_host.c | 20 ++++----------------
  1 file changed, 4 insertions(+), 16 deletions(-)

drivers/scsi/libsas/sas_scsi_host.c +4 -16

index 58476b728c57..626727207889 100644
@@ -27,6 +27,7 @@
  #include <linux/firmware.h>
  #include <linux/export.h>
  #include <linux/ctype.h>
+#include <linux/kernel.h>
 
  #include "sas_internal.h"
 

@@ -946,21 +947,6 @@ void sas_target_destroy(struct scsi_target *starget)
  	sas_put_device(found_dev);
  }
 
-static void sas_parse_addr(u8 *sas_addr, const char *p)
-{
-	int i;
-	for (i = 0; i < SAS_ADDR_SIZE; i++) {
-		u8 h, l;
-		if (!*p)
-			break;
-		h = isdigit(*p) ? *p-'0' : toupper(*p)-'A'+10;
-		p++;
-		l = isdigit(*p) ? *p-'0' : toupper(*p)-'A'+10;
-		p++;
-		sas_addr[i] = (h<<4) | l;
-	}
-}
-
  #define SAS_STRING_ADDR_SIZE	16
 
  int sas_request_addr(struct Scsi_Host *shost, u8 *addr)

@@ -977,7 +963,9 @@ int sas_request_addr(struct Scsi_Host *shost, u8 *addr)
  		goto out;
  	}
 
-	sas_parse_addr(addr, fw->data);
+	res = hex2bin(addr, fw->data, strnlen(fw->data, SAS_ADDR_SIZE * 2) / 2);
+	if (res)
+		goto out;
 
  out:
  	release_firmware(fw);

The function sas_parse_addr() could be easily substituted by hex2bin() which is in kernel library code.