libata: use ata_id_c_string()

There were several places where ATA ID strings are manually terminated
and in some places possibly unterminated strings were passed to string
functions which don't limit length like strstr().  This patch converts
all of them over to ata_id_c_string().

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 4 insertions, 14 deletions

diff --git a/drivers/ata/pata_hpt366.c b/drivers/ata/pata_hpt366.c
index 81deb2c3824c..2202c7ec16e3 100644
--- a/drivers/ata/pata_hpt366.c
+++ b/drivers/ata/pata_hpt366.c
@@ -151,23 +151,13 @@ static const char *bad_ata66_3[] = {
 
 static int hpt_dma_blacklisted(const struct ata_device *dev, char *modestr, const char *list[])
 {
-        unsigned char model_num[ATA_ID_PROD_LEN];
-        char *s;
-        unsigned int len;
+        unsigned char model_num[ATA_ID_PROD_LEN + 1];
         int i = 0;
 
-        ata_id_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
-        s = &model_num[0];
-        len = strnlen(s, sizeof(model_num));
+        ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
 
-        /* ATAPI specifies that empty space is blank-filled; remove blanks */
-        while ((len > 0) && (s[len - 1] == ' ')) {
-                len--;
-                s[len] = 0;
-        }
-
-        while(list[i] != NULL) {
-                if (!strncmp(list[i], s, len)) {
+        while (list[i] != NULL) {
+                if (!strcmp(list[i], model_num)) {
                         printk(KERN_WARNING DRV_NAME ": %s is not supported for %s.\n",
                                 modestr, list[i]);
                         return 1;