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mhi: mhi_uci: add support for shutdown and system error notification

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Add support to handle system error and shutdown
notifications from mhi host.

CRs-Fixed: 1097560
Change-Id: Ied6c907586aa4dc2ed3b1a7c19305877144b3b21
Signed-off-by: Sujeev Dias <sdias@codeaurora.org>
This commit is contained in:
Sujeev Dias 2017-01-31 11:59:23 -08:00
parent 4c332132fc
commit afe468938a
1 changed files with 35 additions and 1 deletions
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36
drivers/platform/msm/mhi_uci/mhi_uci.c
View file

@ -1185,9 +1185,43 @@ static void uci_xfer_cb(struct mhi_cb_info *cb_info)
mutex_unlock(&chan_attr->chan_lock);
wake_up(&chan_attr->wq);
break;
case MHI_CB_SYS_ERROR:
case MHI_CB_MHI_SHUTDOWN:
case MHI_CB_MHI_DISABLED:
uci_log(uci_handle->uci_ipc_log, UCI_DBG_INFO,
"MHI disabled CB received\n");
"MHI disabled CB received 0x%x for chan:%d\n",
cb_info->cb_reason, cb_info->chan);
chan_attr = (cb_info->chan % 2) ? &uci_handle->in_attr :
&uci_handle->out_attr;
mutex_lock(&chan_attr->chan_lock);
chan_attr->enabled = false;
/* we disable entire handler by grabbing only one lock */
uci_handle->enabled = false;
mutex_unlock(&chan_attr->chan_lock);
wake_up(&chan_attr->wq);
/*
* if it's ctrl channel clear the resource now
* otherwise during file close we will release the
* resources
*/
if (uci_handle == uci_handle->uci_ctxt->ctrl_client &&
chan_attr == &uci_handle->out_attr) {
struct uci_buf *itr, *tmp;
mutex_lock(&chan_attr->chan_lock);
atomic_set(&uci_handle->out_attr.avail_pkts, 0);
atomic_set(&uci_handle->out_pkt_pend_ack, 0);
list_for_each_entry_safe(itr, tmp, &chan_attr->buf_head,
node) {
list_del(&itr->node);
kfree(itr->data);
}
atomic_set(&uci_handle->completion_ack, 0);
INIT_LIST_HEAD(&uci_handle->out_attr.buf_head);
mutex_unlock(&chan_attr->chan_lock);
}
break;
case MHI_CB_XFER:
if (!cb_info->result) {