thanks for the comments.
On 16/11/17 16:42, Vinod Koul wrote:
On Wed, Nov 15, 2017 at 02:10:34PM +0000, srinivas.kandagatla@xxxxxxxxxx wrote:
+static void slim_dev_release(struct device *dev)
+{
+ struct slim_device *sbdev = to_slim_device(dev);
+
+ put_device(sbdev->ctrl->dev);
which device would that be?
This is controller device
+static int slim_add_device(struct slim_controller *ctrl,
+ struct slim_device *sbdev,
+ struct device_node *node)
+{
+ sbdev->dev.bus = &slimbus_bus;
+ sbdev->dev.parent = ctrl->dev;
+ sbdev->dev.release = slim_dev_release;
+ sbdev->dev.driver = NULL;
+ sbdev->ctrl = ctrl;
+
+ dev_set_name(&sbdev->dev, "%x:%x:%x:%x",
+ sbdev->e_addr.manf_id,
+ sbdev->e_addr.prod_code,
+ sbdev->e_addr.dev_index,
+ sbdev->e_addr.instance);
+
+ get_device(ctrl->dev);
is this controller device and you ensuring it doesnt go away while you have
slaves on it?
Yes.
+static struct slim_device *slim_alloc_device(struct slim_controller *ctrl,
+ struct slim_eaddr *eaddr,
+ struct device_node *node)
+{
+ struct slim_device *sbdev;
+ int ret;
+
+ sbdev = kzalloc(sizeof(struct slim_device), GFP_KERNEL);
Usual kernel way of doing is kzalloc(*sbdev)
I agree will fix it in next version.
+void slim_report_absent(struct slim_device *sbdev)
+{
+ struct slim_controller *ctrl = sbdev->ctrl;
+
+ if (!ctrl)
+ return;
+
+ /* invalidate logical addresses */
+ mutex_lock(&ctrl->lock);
+ sbdev->is_laddr_valid = false;
+ mutex_unlock(&ctrl->lock);
+
+ ida_simple_remove(&ctrl->laddr_ida, sbdev->laddr);
+ slim_device_update_status(sbdev, SLIM_DEVICE_STATUS_DOWN);
+}
+EXPORT_SYMBOL_GPL(slim_report_absent);
Do you have APIs for report present too, if so why not add te status in
argument as you may have common handling
Yes, We do have api for reporting too, I will give it a try to combine
both.
+static int slim_device_alloc_laddr(struct slim_device *sbdev,
+ u8 *laddr, bool report_present)
+{
+ struct slim_controller *ctrl = sbdev->ctrl;
+ int ret;
+
+ mutex_lock(&ctrl->lock);
+ if (ctrl->get_laddr) {
+ ret = ctrl->get_laddr(ctrl, &sbdev->e_addr, laddr);
+ if (ret < 0)
+ goto err;
+ } else if (report_present) {
+ ret = ida_simple_get(&ctrl->laddr_ida,
+ 0, SLIM_LA_MANAGER - 1, GFP_KERNEL);
+ if (ret < 0)
+ goto err;
+
+ *laddr = ret;
+ } else {
+ ret = -EINVAL;
+ goto err;
+ }
+
+ if (ctrl->set_laddr) {
+ ret = ctrl->set_laddr(ctrl, &sbdev->e_addr, *laddr);
+ if (ret) {
+ ret = -EINVAL;
+ goto err;
+ }
+ }
+
+ sbdev->laddr = *laddr;
if you have this in sbdev, then why have this as an arg also?
Yes makes sens, laddr argument in this function is redundant, it can be
removed totally.
+ sbdev->is_laddr_valid = true;
shouldn't non-zero value signify that?
0 is also a valid laddr.
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