[Libusb-devel] MAX_READ_WRITE

[Martin V. <mva...@me...>]

Hi,

I would like to know if this is still a limit under Linux 2.6.5?

/* Linux usbdevfs has a limit of one page size per read/write. 4096 is
*/
/* the most portable maximum we can do for now */
#define MAX_READ_WRITE	4096

From :
int usb_bulk_write(usb_dev_handle *dev, int ep, char *bytes, int length,
int timeout)

The maximum is an 'int', so 65536?  (64KB)

I don't know exactly how the low level function is working, but in some
CBW write command, I set some burst size > 4KB and I do not have
mistake. But again, on the new device, I can go up to 16KB without any
problem. The 32KB return me the 4KB error limit.

I will check tomorrow morning the code more in detail. By this time I
will appreciate if you can tell me the limitation today. 

Thank's 
Martin