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libftdi: (tomj) limit ftdi_read buffer size to n*64 bytes, n != 0
author
Thomas Jarosch
<opensource@intra2net.com>
Mon, 28 Jul 2003 15:51:29 +0000 (15:51 +0000)
committer
Thomas Jarosch
<opensource@intra2net.com>
Mon, 28 Jul 2003 15:51:29 +0000 (15:51 +0000)
ftdi/ftdi.c
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diff --git
a/ftdi/ftdi.c
b/ftdi/ftdi.c
index
01d8f1a
..
2ccc2b7
100644
(file)
--- a/
ftdi/ftdi.c
+++ b/
ftdi/ftdi.c
@@
-216,6
+216,11
@@
int ftdi_read_data(struct ftdi_context *ftdi, unsigned char *buf, int size) {
int ret = 1;
int offset = 0;
+ if (size != 0 && size % 64 != 0) {
+ ftdi->error_str = "Sorry, read buffer size must currently be a multiple (1x, 2x, 3x...) of 64";
+ return -2;
+ }
+
while (offset < size && ret > 0) {
ret = usb_bulk_read (ftdi->usb_dev, 0x81, readbuf, 64, ftdi->usb_timeout);
// Skip FTDI status bytes