[v4,1/5] usb: split code locating ACPI companion into port and device

[v4,1/5] usb: split code locating ACPI companion into port and device

[Greg Kroah-Hartman]

On Tue, Jan 22, 2019 at 02:42:26PM -0800, Dmitry Torokhov wrote:
> On Tue, Jan 22, 2019 at 2:29 PM Rajat Jain <rajatja@google.com> wrote:
> >
> > Hi Marcel,
> >
> > On Sat, Jan 19, 2019 at 11:51 AM Marcel Holtmann <marcel@holtmann.org> wrote:
> > >
> > > Hi Rajat,
> > >
> > > > In preparation for handling embedded USB devices let's split
> > > > usb_acpi_find_companion() into usb_acpi_find_companion_for_device() and
> > > > usb_acpi_find_companion_for_port().
> > > >
> > > > Signed-off-by: Dmitry Torokhov <dtor@chromium.org>
> > > > Signed-off-by: Rajat Jain <rajatja@google.com>
> > > > Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > > > Tested-by: Sukumar Ghorai <sukumar.ghorai@intel.com>
> > > > ---
> > > > v4: Add Acked-by and Tested-by in signatures.
> > > > v3: same as v1
> > > > v2: same as v1
> > > >
> > > > drivers/usb/core/usb-acpi.c | 133 +++++++++++++++++++-----------------
> > > > 1 file changed, 72 insertions(+), 61 deletions(-)
> > >
> > > what is the plan here? I take this via bluetooth-next tree?
> >
> > Yes, I'd think that would be the best plan. Dmitry / Greg - do you
> > have any objections / suggestions?
> 
> That's up to Greg, but since he'd acked the patches I'd assume he's OK
> with taking it through bluetooth. As an option Marcel could cut an
> immutable branch off 4.20 with the first 2 patches so that he and Greg
> can both pull it into their main branches and then git will do the
> right thing when Linus pulls from them. Lee uses quite a bit of them
> in MFD and other maintainers are known to occasionally make them for
> work that needs to be shared between trees.

I don't need to take these, they can all go through one tree, which is
why I gave my ack to the patch.

thanks,

greg k-h

[v4,1/5] usb: split code locating ACPI companion into port and device

[Dmitry Torokhov]

On Tue, Jan 22, 2019 at 2:29 PM Rajat Jain <rajatja@google.com> wrote:
>
> Hi Marcel,
>
> On Sat, Jan 19, 2019 at 11:51 AM Marcel Holtmann <marcel@holtmann.org> wrote:
> >
> > Hi Rajat,
> >
> > > In preparation for handling embedded USB devices let's split
> > > usb_acpi_find_companion() into usb_acpi_find_companion_for_device() and
> > > usb_acpi_find_companion_for_port().
> > >
> > > Signed-off-by: Dmitry Torokhov <dtor@chromium.org>
> > > Signed-off-by: Rajat Jain <rajatja@google.com>
> > > Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > > Tested-by: Sukumar Ghorai <sukumar.ghorai@intel.com>
> > > ---
> > > v4: Add Acked-by and Tested-by in signatures.
> > > v3: same as v1
> > > v2: same as v1
> > >
> > > drivers/usb/core/usb-acpi.c | 133 +++++++++++++++++++-----------------
> > > 1 file changed, 72 insertions(+), 61 deletions(-)
> >
> > what is the plan here? I take this via bluetooth-next tree?
>
> Yes, I'd think that would be the best plan. Dmitry / Greg - do you
> have any objections / suggestions?

That's up to Greg, but since he'd acked the patches I'd assume he's OK
with taking it through bluetooth. As an option Marcel could cut an
immutable branch off 4.20 with the first 2 patches so that he and Greg
can both pull it into their main branches and then git will do the
right thing when Linus pulls from them. Lee uses quite a bit of them
in MFD and other maintainers are known to occasionally make them for
work that needs to be shared between trees.

Thanks.

[v4,1/5] usb: split code locating ACPI companion into port and device

[Rajat Jain]

Hi Marcel,

On Sat, Jan 19, 2019 at 11:51 AM Marcel Holtmann <marcel@holtmann.org> wrote:
>
> Hi Rajat,
>
> > In preparation for handling embedded USB devices let's split
> > usb_acpi_find_companion() into usb_acpi_find_companion_for_device() and
> > usb_acpi_find_companion_for_port().
> >
> > Signed-off-by: Dmitry Torokhov <dtor@chromium.org>
> > Signed-off-by: Rajat Jain <rajatja@google.com>
> > Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > Tested-by: Sukumar Ghorai <sukumar.ghorai@intel.com>
> > ---
> > v4: Add Acked-by and Tested-by in signatures.
> > v3: same as v1
> > v2: same as v1
> >
> > drivers/usb/core/usb-acpi.c | 133 +++++++++++++++++++-----------------
> > 1 file changed, 72 insertions(+), 61 deletions(-)
>
> what is the plan here? I take this via bluetooth-next tree?

Yes, I'd think that would be the best plan. Dmitry / Greg - do you
have any objections / suggestions?

>
> Regards
>
> Marcel
>

[v4,1/5] usb: split code locating ACPI companion into port and device

[Marcel Holtmann]

Hi Rajat,

> In preparation for handling embedded USB devices let's split
> usb_acpi_find_companion() into usb_acpi_find_companion_for_device() and
> usb_acpi_find_companion_for_port().
> 
> Signed-off-by: Dmitry Torokhov <dtor@chromium.org>
> Signed-off-by: Rajat Jain <rajatja@google.com>
> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Tested-by: Sukumar Ghorai <sukumar.ghorai@intel.com>
> ---
> v4: Add Acked-by and Tested-by in signatures.
> v3: same as v1
> v2: same as v1
> 
> drivers/usb/core/usb-acpi.c | 133 +++++++++++++++++++-----------------
> 1 file changed, 72 insertions(+), 61 deletions(-)

what is the plan here? I take this via bluetooth-next tree?

Regards

Marcel

[v4,1/5] usb: split code locating ACPI companion into port and device

[Rajat Jain]

From: Dmitry Torokhov <dtor@chromium.org>

In preparation for handling embedded USB devices let's split
usb_acpi_find_companion() into usb_acpi_find_companion_for_device() and
usb_acpi_find_companion_for_port().

Signed-off-by: Dmitry Torokhov <dtor@chromium.org>
Signed-off-by: Rajat Jain <rajatja@google.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tested-by: Sukumar Ghorai <sukumar.ghorai@intel.com>
---
v4: Add Acked-by and Tested-by in signatures.
v3: same as v1
v2: same as v1

 drivers/usb/core/usb-acpi.c | 133 +++++++++++++++++++-----------------
 1 file changed, 72 insertions(+), 61 deletions(-)

diff --git a/drivers/usb/core/usb-acpi.c b/drivers/usb/core/usb-acpi.c
index e221861b3187..8ff73c83e8e8 100644
--- a/drivers/usb/core/usb-acpi.c
+++ b/drivers/usb/core/usb-acpi.c
@@ -139,12 +139,79 @@ static struct acpi_device *usb_acpi_find_port(struct acpi_device *parent,
 	return acpi_find_child_device(parent, raw, false);
 }
 
-static struct acpi_device *usb_acpi_find_companion(struct device *dev)
+static struct acpi_device *
+usb_acpi_get_companion_for_port(struct usb_port *port_dev)
 {
 	struct usb_device *udev;
 	struct acpi_device *adev;
 	acpi_handle *parent_handle;
+	int port1;
+
+	/* Get the struct usb_device point of port's hub */
+	udev = to_usb_device(port_dev->dev.parent->parent);
+
+	/*
+	 * The root hub ports' parent is the root hub. The non-root-hub
+	 * ports' parent is the parent hub port which the hub is
+	 * connected to.
+	 */
+	if (!udev->parent) {
+		adev = ACPI_COMPANION(&udev->dev);
+		port1 = usb_hcd_find_raw_port_number(bus_to_hcd(udev->bus),
+						     port_dev->portnum);
+	} else {
+		parent_handle = usb_get_hub_port_acpi_handle(udev->parent,
+							     udev->portnum);
+		if (!parent_handle)
+			return NULL;
+
+		acpi_bus_get_device(parent_handle, &adev);
+		port1 = port_dev->portnum;
+	}
+
+	return usb_acpi_find_port(adev, port1);
+}
+
+static struct acpi_device *
+usb_acpi_find_companion_for_port(struct usb_port *port_dev)
+{
+	struct acpi_device *adev;
+	struct acpi_pld_info *pld;
+	acpi_handle *handle;
+	acpi_status status;
+
+	adev = usb_acpi_get_companion_for_port(port_dev);
+	if (!adev)
+		return NULL;
+
+	handle = adev->handle;
+	status = acpi_get_physical_device_location(handle, &pld);
+	if (!ACPI_FAILURE(status) && pld) {
+		port_dev->location = USB_ACPI_LOCATION_VALID
+			| pld->group_token << 8 | pld->group_position;
+		port_dev->connect_type = usb_acpi_get_connect_type(handle, pld);
+		ACPI_FREE(pld);
+	}
 
+	return adev;
+}
+
+static struct acpi_device *
+usb_acpi_find_companion_for_device(struct usb_device *udev)
+{
+	struct acpi_device *adev;
+
+	if (!udev->parent)
+		return NULL;
+
+	/* root hub is only child (_ADR=0) under its parent, the HC */
+	adev = ACPI_COMPANION(udev->dev.parent);
+	return acpi_find_child_device(adev, 0, false);
+}
+
+
+static struct acpi_device *usb_acpi_find_companion(struct device *dev)
+{
 	/*
 	 * In the ACPI DSDT table, only usb root hub and usb ports are
 	 * acpi device nodes. The hierarchy like following.
@@ -158,66 +225,10 @@ static struct acpi_device *usb_acpi_find_companion(struct device *dev)
 	 * So all binding process is divided into two parts. binding
 	 * root hub and usb ports.
 	 */
-	if (is_usb_device(dev)) {
-		udev = to_usb_device(dev);
-		if (udev->parent)
-			return NULL;
-
-		/* root hub is only child (_ADR=0) under its parent, the HC */
-		adev = ACPI_COMPANION(dev->parent);
-		return acpi_find_child_device(adev, 0, false);
-	} else if (is_usb_port(dev)) {
-		struct usb_port *port_dev = to_usb_port(dev);
-		int port1 = port_dev->portnum;
-		struct acpi_pld_info *pld;
-		acpi_handle *handle;
-		acpi_status status;
-
-		/* Get the struct usb_device point of port's hub */
-		udev = to_usb_device(dev->parent->parent);
-
-		/*
-		 * The root hub ports' parent is the root hub. The non-root-hub
-		 * ports' parent is the parent hub port which the hub is
-		 * connected to.
-		 */
-		if (!udev->parent) {
-			struct usb_hcd *hcd = bus_to_hcd(udev->bus);
-			int raw;
-
-			raw = usb_hcd_find_raw_port_number(hcd, port1);
-
-			adev = usb_acpi_find_port(ACPI_COMPANION(&udev->dev),
-						  raw);
-
-			if (!adev)
-				return NULL;
-		} else {
-			parent_handle =
-				usb_get_hub_port_acpi_handle(udev->parent,
-				udev->portnum);
-			if (!parent_handle)
-				return NULL;
-
-			acpi_bus_get_device(parent_handle, &adev);
-
-			adev = usb_acpi_find_port(adev, port1);
-
-			if (!adev)
-				return NULL;
-		}
-		handle = adev->handle;
-		status = acpi_get_physical_device_location(handle, &pld);
-		if (ACPI_FAILURE(status) || !pld)
-			return adev;
-
-		port_dev->location = USB_ACPI_LOCATION_VALID
-			| pld->group_token << 8 | pld->group_position;
-		port_dev->connect_type = usb_acpi_get_connect_type(handle, pld);
-		ACPI_FREE(pld);
-
-		return adev;
-	}
+	if (is_usb_device(dev))
+		return usb_acpi_find_companion_for_device(to_usb_device(dev));
+	else if (is_usb_port(dev))
+		return usb_acpi_find_companion_for_port(to_usb_port(dev));
 
 	return NULL;
 }