wil6210: fix temperature debugfs

For negative temperatures, "temp" debugfs is showing wrong values.
Use signed types so proper calculations is done for sub zero
temperatures.
Signed-off-by: Dedy Lansky <dlansky@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ath/wil6210/debugfs.c

@@ -1388,7 +1388,7 @@ static const struct file_operations fops_bf = {
 };
 
 /*---------temp------------*/
-static void print_temp(struct seq_file *s, const char *prefix, u32 t)
+static void print_temp(struct seq_file *s, const char *prefix, s32 t)
 {
 	switch (t) {
 	case 0:
@@ -1396,7 +1396,8 @@ static void print_temp(struct seq_file *s, const char *prefix, u32 t)
 		seq_printf(s, "%s N/A\n", prefix);
 	break;
 	default:
-		seq_printf(s, "%s %d.%03d\n", prefix, t / 1000, t % 1000);
+		seq_printf(s, "%s %s%d.%03d\n", prefix, (t < 0 ? "-" : ""),
+			   abs(t / 1000), abs(t % 1000));
 		break;
 	}
 }
@@ -1404,7 +1405,7 @@ static void print_temp(struct seq_file *s, const char *prefix, u32 t)
 static int wil_temp_debugfs_show(struct seq_file *s, void *data)
 {
 	struct wil6210_priv *wil = s->private;
-	u32 t_m, t_r;
+	s32 t_m, t_r;
 	int rc = wmi_get_temperature(wil, &t_m, &t_r);
 
 	if (rc) {