1.安全优化。

device/pwm.c

@@ -209,8 +209,9 @@ static ssize_t mr_pwm_write(struct mr_dev *dev, int off, const void *buf, size_t
     for (wr_size = 0; wr_size < size; wr_size += sizeof(*wr_buf))
     {
         /* Calculate the compare value */
-        uint32_t compare_value = (uint32_t)(((float)*wr_buf / 1000000.0f) * (float)(pwm->period));
-        MR_BOUND(compare_value, 0, pwm->period);
+        uint32_t compare_value = MR_BOUND((uint32_t)(((float)*wr_buf / 1000000.0f) * (float)(pwm->period)),
+                                          0,
+                                          pwm->period);
         ops->write(pwm, off, compare_value);
         wr_buf++;
     }

source/device.c

@@ -388,11 +388,13 @@ MR_INLINE ssize_t dev_ioctl(struct mr_dev *dev, int desc, int off, int cmd, void
         {
             if (args != MR_NULL)
             {
-                int *path = (int *)args;
-                char *buf = (char *)path[0];
-                size_t bufsz = (size_t)path[1];
+                struct
+                {
+                    char *buf;
+                    size_t bufsz;
+                } *path = args;
 
-                return dev_get_path(dev, buf, bufsz);
+                return dev_get_path(dev, path->buf, path->bufsz);
             }
             return MR_EINVAL;
         }