ChangeSet 1.1608.84.15, 2004/03/10 11:55:44-08:00, [EMAIL PROTECTED]
[PATCH] USB: fix stack usage in pl2303 driver
Arghh - while trying to follow this I just realized the pl2303 is DMA'ing
to the stack - not good!
Could you please just try with the patch below. I'm not sure if this might
cause the MA620 trouble but it's definedly a bug and maybe it improves
things for you...
drivers/usb/serial/pl2303.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletion(-)
diff -Nru a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
--- a/drivers/usb/serial/pl2303.c Tue Mar 16 15:02:58 2004
+++ b/drivers/usb/serial/pl2303.c Tue Mar 16 15:02:58 2004
@@ -403,7 +403,7 @@
{
struct termios tmp_termios;
struct usb_serial *serial = port->serial;
- unsigned char buf[10];
+ unsigned char *buf;
int result;
if (port_paranoia_check (port, __FUNCTION__))
@@ -414,6 +414,10 @@
usb_clear_halt(serial->dev, port->write_urb->pipe);
usb_clear_halt(serial->dev, port->read_urb->pipe);
+ buf = kmalloc(10, GFP_KERNEL);
+ if (buf==NULL)
+ return -ENOMEM;
+
#define FISH(a,b,c,d) \
result=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0), \
b, a, c, d, buf, 1, 100); \
@@ -432,6 +436,8 @@
SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 1);
FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
+
+ kfree(buf);
/* Setup termios */
if (port->tty) {
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