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mei: wd: simplify wd_send command 

Add reduce credits to wd_send to remove code
repetition and simplify error handling

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomas Winkler 2014-02-19 17:35:50 +02:00 committed by Greg Kroah-Hartman
parent 7ca96aa278
commit b6d81fd661
2 changed files with 30 additions and 29 deletions
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7
drivers/misc/mei/interrupt.c
View File

@ -480,10 +480,9 @@ int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list)
if (mei_cl_is_connected(&dev->wd_cl)) {
if (dev->wd_pending &&
mei_cl_flow_ctrl_creds(&dev->wd_cl) > 0) {
if (mei_wd_send(dev))
dev_dbg(&dev->pdev->dev, "wd send failed.\n");
else if (mei_cl_flow_ctrl_reduce(&dev->wd_cl))
return -EIO;
ret = mei_wd_send(dev);
if (ret)
return ret;
dev->wd_pending = false;
}
}

52
drivers/misc/mei/wd.c
View File

@ -111,13 +111,16 @@ int mei_wd_host_init(struct mei_device *dev)
* returns 0 if success,
* -EIO when message send fails
* -EINVAL when invalid message is to be sent
* -ENODEV on flow control failure
*/
int mei_wd_send(struct mei_device *dev)
{
struct mei_cl *cl = &dev->wd_cl;
struct mei_msg_hdr hdr;
int ret;
hdr.host_addr = dev->wd_cl.host_client_id;
hdr.me_addr = dev->wd_cl.me_client_id;
hdr.host_addr = cl->host_client_id;
hdr.me_addr = cl->me_client_id;
hdr.msg_complete = 1;
hdr.reserved = 0;
hdr.internal = 0;
@ -126,10 +129,24 @@ int mei_wd_send(struct mei_device *dev)
hdr.length = MEI_WD_START_MSG_SIZE;
else if (!memcmp(dev->wd_data, mei_stop_wd_params, MEI_WD_HDR_SIZE))
hdr.length = MEI_WD_STOP_MSG_SIZE;
else
else {
dev_err(&dev->pdev->dev, "wd: invalid message is to be sent, aborting\n");
return -EINVAL;
}
return mei_write_message(dev, &hdr, dev->wd_data);
ret = mei_write_message(dev, &hdr, dev->wd_data);
if (ret) {
dev_err(&dev->pdev->dev, "wd: write message failed\n");
return ret;
}
ret = mei_cl_flow_ctrl_reduce(cl);
if (ret) {
dev_err(&dev->pdev->dev, "wd: flow_ctrl_reduce failed.\n");
return ret;
}
return 0;
}
/**
@ -159,16 +176,9 @@ int mei_wd_stop(struct mei_device *dev)
goto out;
if (ret && mei_hbuf_acquire(dev)) {
ret = 0;
if (!mei_wd_send(dev)) {
ret = mei_cl_flow_ctrl_reduce(&dev->wd_cl);
if (ret)
goto out;
} else {
dev_err(&dev->pdev->dev, "wd: send stop failed\n");
}
ret = mei_wd_send(dev);
if (ret)
goto out;
dev->wd_pending = false;
} else {
dev->wd_pending = true;
@ -289,18 +299,10 @@ static int mei_wd_ops_ping(struct watchdog_device *wd_dev)
dev_dbg(&dev->pdev->dev, "wd: sending ping\n");
if (mei_wd_send(dev)) {
dev_err(&dev->pdev->dev, "wd: send failed.\n");
ret = -EIO;
ret = mei_wd_send(dev);
if (ret)
goto end;
}
if (mei_cl_flow_ctrl_reduce(&dev->wd_cl)) {
dev_err(&dev->pdev->dev, "wd: mei_cl_flow_ctrl_reduce() failed.\n");
ret = -EIO;
goto end;
}
dev->wd_pending = false;
} else {
dev->wd_pending = true;
}