ARMmbed
/
mbed-os
mirror of https://github.com/ARMmbed/mbed-os.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Limit USB control transfer size 

Limit the size of control reads to the max packet size of endpoint
zero. This fixes the handling of large transfers.
pull/9768/head
Russ Butler 2018-03-20 14:48:16 -05:00
parent 2a84e3a4f6
commit 0653799b5a
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
usb/device/USBDevice/USBDevice.cpp
View File

@ -49,6 +49,8 @@
#endif
#define MAX_PACKET_SIZE_EP0 64
#define USB_MIN(a, b) ((a) > (b) ? (b) : (a))
bool USBDevice::_request_get_descriptor()
{
@ -224,7 +226,7 @@ bool USBDevice::_control_out()
complete_request_xfer_done(true);
}
} else {
_phy->ep0_read(_transfer.ptr, _transfer.remaining);
_phy->ep0_read(_transfer.ptr, USB_MIN(_transfer.remaining, _max_packet_size_ep0));
}
return true;
@ -800,7 +802,7 @@ void USBDevice::_control_setup_continue()
} else {
/* OUT stage */
_transfer.stage = DataOut;
_phy->ep0_read(_transfer.ptr, _transfer.remaining);
_phy->ep0_read(_transfer.ptr, USB_MIN(_transfer.remaining, _max_packet_size_ep0));
}
} else {
/* Status stage */