X-Git-Url: http://developer.intra2net.com/git/?p=libftdi;a=blobdiff_plain;f=src%2Fftdi.c;h=6de60bee189ad902ad59753a3f91124cf0e12507;hp=1e92dc585d66be0a5da7b3b43a040ad64e513c0b;hb=200bd3ed2e1d2389217be44c0adc728909a2a100;hpb=17431287ffa37d2085dbe7cb30afa17487e456a2

diff --git a/src/ftdi.c b/src/ftdi.c
index 1e92dc5..6de60be 100644
--- a/src/ftdi.c
+++ b/src/ftdi.c
@@ -2,7 +2,7 @@
                           ftdi.c  -  description
                              -------------------
     begin                : Fri Apr 4 2003
-    copyright            : (C) 2003-2010 by Intra2net AG
+    copyright            : (C) 2003-2011 by Intra2net AG and the libftdi developers
     email                : opensource@intra2net.com
  ***************************************************************************/
 
@@ -1376,19 +1376,22 @@ static void ftdi_write_data_cb(struct libusb_transfer *transfer)
 struct ftdi_transfer_control *ftdi_write_data_submit(struct ftdi_context *ftdi, unsigned char *buf, int size)
 {
     struct ftdi_transfer_control *tc;
-    struct libusb_transfer *transfer = libusb_alloc_transfer(0);
+    struct libusb_transfer *transfer;
     int write_size, ret;
 
     if (ftdi == NULL || ftdi->usb_dev == NULL)
-    {
-        libusb_free_transfer(transfer);
         return NULL;
-    }
 
     tc = (struct ftdi_transfer_control *) malloc (sizeof (*tc));
+    if (!tc)
+        return NULL;
 
-    if (!tc || !transfer)
+    transfer = libusb_alloc_transfer(0);
+    if (!transfer)
+    {
+        free(tc);
         return NULL;
+    }
 
     tc->ftdi = ftdi;
     tc->completed = 0;
@@ -1410,8 +1413,7 @@ struct ftdi_transfer_control *ftdi_write_data_submit(struct ftdi_context *ftdi,
     if (ret < 0)
     {
         libusb_free_transfer(transfer);
-        tc->completed = 1;
-        tc->transfer = NULL;
+        free(tc);
         return NULL;
     }
     tc->transfer = transfer;
@@ -2310,6 +2312,7 @@ int ftdi_eeprom_build(struct ftdi_context *ftdi)
         case TYPE_2232H:            // six extra config bytes + 4 bytes PnP stuff
         case TYPE_4232H:
             user_area_size = 86;
+            break;
         default:
             user_area_size = 0;
             break;
@@ -2941,7 +2944,6 @@ int ftdi_eeprom_decode(struct ftdi_context *ftdi, int verbose)
                                 "IOMODE","BB_WR","BB_RD"
                                };
             char *cbus_BB[] = {"RXF","TXE","RD", "WR"};
-            int i;
 
             if (eeprom->invert)
             {
@@ -2976,12 +2978,12 @@ int ftdi_eeprom_decode(struct ftdi_context *ftdi, int verbose)
 /**
    Get a value from the decoded EEPROM structure
 
-   \\param ftdi pointer to ftdi_context
-   \\param value_name Enum of the value to query
-   \\param Pointer to store read value
+   \param ftdi pointer to ftdi_context
+   \param value_name Enum of the value to query
+   \param value Pointer to store read value
 
-   \\retval 0: all fine
-   \\retval -1: Value doesn't exist
+   \retval 0: all fine
+   \retval -1: Value doesn't exist
 */
 int ftdi_get_eeprom_value(struct ftdi_context *ftdi, enum ftdi_eeprom_value value_name, int* value)
 {
@@ -3111,13 +3113,13 @@ int ftdi_get_eeprom_value(struct ftdi_context *ftdi, enum ftdi_eeprom_value valu
    Set a value in the decoded EEPROM Structure
    No parameter checking is performed
 
-   \\param ftdi pointer to ftdi_context
-   \\param value_name Enum of the value to query
-   \\param Value to set
+   \param ftdi pointer to ftdi_context
+   \param value_name Enum of the value to set
+   \param value to set
 
-   \\retval 0: all fine
-   \\retval -1: Value doesn't exist
-   \\retval -2: Value not user settable
+   \retval 0: all fine
+   \retval -1: Value doesn't exist
+   \retval -2: Value not user settable
 */
 int ftdi_set_eeprom_value(struct ftdi_context *ftdi, enum ftdi_eeprom_value value_name, int value)
 {
@@ -3245,17 +3247,27 @@ int ftdi_set_eeprom_value(struct ftdi_context *ftdi, enum ftdi_eeprom_value valu
 /** Get the read-only buffer to the binary EEPROM content
 
     \param ftdi pointer to ftdi_context
-    \param ftdi buffer to receive EEPROM content
+    \param buf buffer to receive EEPROM content
     \param size Size of receiving buffer
 
     \retval 0: All fine
     \retval -1: struct ftdi_contxt or ftdi_eeprom missing
+    \retval -2: Not enough room to store eeprom
 */
 int ftdi_get_eeprom_buf(struct ftdi_context *ftdi, unsigned char * buf, int size)
 {
     if (!ftdi || !(ftdi->eeprom))
         ftdi_error_return(-1, "No appropriate structure");
+
+    if (!buf || size < ftdi->eeprom->size)
+        ftdi_error_return(-1, "Not enough room to store eeprom");
+
+    // Only copy up to FTDI_MAX_EEPROM_SIZE bytes
+    if (size > FTDI_MAX_EEPROM_SIZE)
+        size = FTDI_MAX_EEPROM_SIZE;
+
     memcpy(buf, ftdi->eeprom->buf, size);
+
     return 0;
 }