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usb-msc: fix write acknowledgement bug

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Fixes https://github.com/libopencm3/libopencm3/issues/409
This commit is contained in:
Sebastian Holzapfel 2018-02-06 22:33:59 +11:00 committed by Karl Palsson
parent f871e539ed
commit 64a6f362b8
1 changed files with 15 additions and 0 deletions
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15
lib/usb/usb_msc.c
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@ -594,6 +594,21 @@ static void msc_data_rx_cb(usbd_device *usbd_dev, uint8_t ep)
trans->current_block++;
}
}
/* Fix "writes aren't acknowledged" bug on Linux (PR #409) */
if (false == trans->csw_valid) {
scsi_command(ms, trans, EVENT_NEED_STATUS);
trans->csw_valid = true;
}
left = sizeof(struct usb_msc_csw) - trans->csw_sent;
if (0 < left) {
max_len = MIN(ms->ep_out_size, left);
p = &trans->csw.buf[trans->csw_sent];
len = usbd_ep_write_packet(usbd_dev, ms->ep_in, p,
max_len);
trans->csw_sent += len;
}
} else if (trans->byte_count < trans->bytes_to_write) {
if (0 < trans->block_count) {
if ((0 == trans->byte_count) && (NULL != ms->lock)) {