X-Git-Url: https://oss.titaniummirror.com/gitweb?a=blobdiff_plain;f=src%2Fcp210x.c.karmic;h=707665782103b02ad8597c86c77c839a45b32e91;hb=adcc360e576188af96b2dd22be2bed75e151d769;hp=78d6b62c1e0e1a84c0bae56825dd909ad6766224;hpb=a50a97ae61aefa7a7795e46c71c1eee09ac951b6;p=cp210x.git

diff --git a/src/cp210x.c.karmic b/src/cp210x.c.karmic
index 78d6b62..7076657 100644
--- a/src/cp210x.c.karmic
+++ b/src/cp210x.c.karmic
@@ -228,25 +228,66 @@ static struct usb_serial_driver cp210x_device = {
 #define CP210x_PART_CP2102	0x02
 #define CP210x_PART_CP2103	0x03
 
+/* Helper to make usb string size */
+#define USBSTRLEN(x)		(x * 2 + 2)
+
+/* Populates usbstr with: (len) + (0x03) + unicode(str).  Each char in str
+ * takes two bytes in unicode format.
+ * Returns the resulting length of the string in usbstr.
+ * This function can accept overlapping usbstr and str as long as the overlap
+ * does not cause data written to usbstr to overwrite data not yet read from
+ * str.
+ */
+static int make_usb_string(char *usbstr, size_t usblen, char *src,
+		size_t srclen)
+{
+	int len = 0;
+
+	if (usbstr && usblen >= 2 && src && *src && srclen) {
+		char *p;
+
+		if (usblen > 255)
+			usblen = 255;
+
+		p = usbstr + 1;
+		*p++ = 0x03;
+		len = 2;
+		while (srclen && len < usblen) {
+			*p++ = *src++;
+			*p++ = 0;
+			len += 2;
+			srclen--;
+		}
+		*usbstr = (char)len;
+	}
+	return len;
+}
+
 /*
- * cp210x_buf_from_user
- * Copy a buffer from user space, returning the number of bytes copied
- * from ubuf.buf into kbuf.  klen is the size of the buffer at kbuf.
+ * cp210x_usbstr_from_user
+ * Populate kbuf with a usb string derived from a user space variable.  klen
+ * is the size of the buffer at kbuf.
+ * Returns the number of bytes used in kbuf.
  */
-static size_t cp210x_buf_from_user(char *kbuf, unsigned long ubuf, size_t klen)
+static size_t cp210x_usbstr_from_user(char *kbuf, unsigned long ubuf, size_t klen)
 {
 	struct cp210x_buffer t;
+	char* str;
+	size_t slen;
 
-	if (!kbuf || !ubuf || !klen ||
-			copy_from_user(&t, (struct cp210x_buffer __user *)ubuf,
-			sizeof(t)))
+	if (!kbuf || !ubuf || !klen)
+		return 0;
+	if (copy_from_user(&t, (struct cp210x_buffer __user *)ubuf, sizeof(t)))
 		return 0;
-	if (t.len < klen)
-		klen = t.len;
-	if (!t.buf || !t.len ||
-			copy_from_user(kbuf, (u8 __user *)t.buf, klen))
+	if (!t.buf || !t.len || USBSTRLEN(t.len) > klen)
 		return 0;
-	return klen;
+	slen = (klen - 2) / 2;
+	if (t.len < slen)
+		slen = t.len;
+	str = kbuf + klen - slen;
+	if (copy_from_user(str, (u8 __user *)t.buf, slen))
+		return 0;
+	return make_usb_string(kbuf, klen, str, slen);
 }
 
 /* cp210x_has_setmfg
@@ -340,39 +381,6 @@ static inline int cp210x_setu16(struct usb_serial_port *port, int cmd,
 			value, NULL, 0);
 }
 
-/* Populates usbstr with: (len) + (0x03) + unicode(str).  Each char in str
- * takes up two bytes in unicode format, so the resulting len(usbstr) is
- * 2 * len(str) + 2.
- * Returns the resulting length of the string in usbstr.
- * This function can accept overlapping usbstr and str as long as the overlap
- * does not cause data written to usbstr to overwrite data not yet read from
- * str.
- */
-static int make_usb_string(char *usbstr, size_t usblen, char *src,
-		size_t srclen)
-{
-	int len = 0;
-
-	if (usbstr && usblen >= 2 && src && *src && srclen) {
-		char *p;
-
-		if (usblen > 255)
-			usblen = 255;
-
-		p = usbstr + 1;
-		*p++ = 0x03;
-		len = 2;
-		while (srclen && len < usblen) {
-			*p++ = *src++;
-			*p++ = 0;
-			len += 2;
-			srclen--;
-		}
-		*usbstr = (char)len;
-	}
-	return len;
-}
-
 /*
  * cp210x_setstr
  *
@@ -756,7 +764,7 @@ static int cp210x_ioctl(struct tty_struct *tty, struct file *file,
 	}
 	break;
 
-	case IOCTL_GPIOGET:
+	case CP210x_IOCTL_GPIOGET:
 	if (cp210x_get_partnum(port) == CP210x_PART_CP2103) {
 		u8 gpio = 0;
 		if (!cp210x_gpioget(port, &gpio) && !copy_to_user(
@@ -766,27 +774,28 @@ static int cp210x_ioctl(struct tty_struct *tty, struct file *file,
 	return -EFAULT;
 	break;
 
-	case IOCTL_GPIOSET:
+	case CP210x_IOCTL_GPIOSET:
 	if (cp210x_get_partnum(port) == CP210x_PART_CP2103 &&
 			!cp210x_gpioset(port, arg))
 		return 0;
 	return -EFAULT;
 	break;
 
-	case IOCTL_GPIOBIC:
-	case IOCTL_GPIOBIS:
+	case CP210x_IOCTL_GPIOBIC:
+	case CP210x_IOCTL_GPIOBIS:
 	if (cp210x_get_partnum(port) == CP210x_PART_CP2103 &&
-			!cp210x_gpiosetb(port, (cmd==IOCTL_GPIOBIC) ?  0 : arg,
-			(cmd==IOCTL_GPIOBIC) ? arg : 0))
+			!cp210x_gpiosetb(port,
+				(cmd==CP210x_IOCTL_GPIOBIC) ?  0 : arg,
+				(cmd==CP210x_IOCTL_GPIOBIC) ? arg : 0))
 		return 0;
 	return -EFAULT;
 	break;
 
-	case IOCTL_DEVICERESET:
+	case CP210x_IOCTL_DEVICERESET:
 	return cp210x_reset(port);
 	break;
 
-	case IOCTL_PORTCONFGET:
+	case CP210x_IOCTL_PORTCONFGET:
 	{
 		struct cp210x_port_config config;
 		if (!cp210x_portconfget(port, &config) && !copy_to_user(
@@ -797,7 +806,7 @@ static int cp210x_ioctl(struct tty_struct *tty, struct file *file,
 	return -EFAULT;
 	break;
 
-	case IOCTL_PORTCONFSET:
+	case CP210x_IOCTL_PORTCONFSET:
 	{
 	struct cp210x_port_config config;
 	if (!copy_from_user(&config, (struct cp210x_port_config __user *)arg,
@@ -808,7 +817,7 @@ static int cp210x_ioctl(struct tty_struct *tty, struct file *file,
 	}
 	break;
 
-	case IOCTL_SETVID:
+	case CP210x_IOCTL_SETVID:
 	{
 		unsigned int vid;
 		if (!copy_from_user(&vid, (unsigned int __user *)arg,
@@ -819,7 +828,7 @@ static int cp210x_ioctl(struct tty_struct *tty, struct file *file,
 	}
 	break;
 
-	case IOCTL_SETPID:
+	case CP210x_IOCTL_SETPID:
 	{
 		unsigned int pid;
 		if (!copy_from_user(&pid, (unsigned int __user *)arg,
@@ -830,46 +839,40 @@ static int cp210x_ioctl(struct tty_struct *tty, struct file *file,
 	}
 	break;
 
-	case IOCTL_SETMFG:
+	case CP210x_IOCTL_SETMFG:
 	if (cp210x_has_setmfg()) {
-		char usbstr[CP210x_MAX_MFG_STRLEN * 2 + 2];
-		char *str = usbstr + sizeof(usbstr) - CP210x_MAX_MFG_STRLEN;
-		size_t len = cp210x_buf_from_user(str, arg,
-				CP210x_MAX_MFG_STRLEN);
-		len = make_usb_string(usbstr, sizeof(usbstr), str, len);
+		char usbstr[USBSTRLEN(CP210x_MAX_MFG_STRLEN)];
+		size_t len = cp210x_usbstr_from_user(usbstr, arg,
+				sizeof(usbstr));
 		if (len && cp210x_setstr(port, 0x00, usbstr) == len)
 			return 0;
 	}
 	return -EFAULT;
 	break;
 
-	case IOCTL_SETPRODUCT:
+	case CP210x_IOCTL_SETPRODUCT:
 	{
-		char usbstr[CP210x_MAX_PRODUCT_STRLEN * 2 + 2];
-		char *str = usbstr + sizeof(usbstr) - CP210x_MAX_PRODUCT_STRLEN;
-		size_t len = cp210x_buf_from_user(str, arg,
-				CP210x_MAX_PRODUCT_STRLEN);
-		len = make_usb_string(usbstr, sizeof(usbstr), str, len);
+		char usbstr[USBSTRLEN(CP210x_MAX_PRODUCT_STRLEN)];
+		size_t len = cp210x_usbstr_from_user(usbstr, arg,
+				sizeof(usbstr));
 		if (len && cp210x_setstr(port, 0x03, usbstr) == len)
 			return 0;
 		return -EFAULT;
 	}
 	break;
 
-	case IOCTL_SETSERIAL:
+	case CP210x_IOCTL_SETSERIAL:
 	{
-		char usbstr[CP210x_MAX_SERIAL_STRLEN * 2 + 2];
-		char *str = usbstr + sizeof(usbstr) - CP210x_MAX_SERIAL_STRLEN;
-		size_t len = cp210x_buf_from_user(str, arg,
-				CP210x_MAX_SERIAL_STRLEN);
-		len = make_usb_string(usbstr, sizeof(usbstr), str, len);
+		char usbstr[USBSTRLEN(CP210x_MAX_SERIAL_STRLEN)];
+		size_t len = cp210x_usbstr_from_user(usbstr, arg,
+				sizeof(usbstr));
 		if (len && cp210x_setstr(port, 0x04, usbstr) == len)
 			return 0;
 		return -EFAULT;
 	}
 	break;
 
-	case IOCTL_SETDEVVER:
+	case CP210x_IOCTL_SETDEVVER:
 	{
 		unsigned int ver;
 		if (!copy_from_user(&ver, (unsigned int __user *)arg,