[PATCH v13 1/5] usb: hci: add hc_driver as argument for usb_hcd_pci_probe

Vinod Koul
2020-05-06T06:00:59Z

usb_hcd_pci_probe expects users to call this with driver_data set as
hc_driver, that limits the possibility of using the driver_data for
driver data.

Add hc_driver as argument to usb_hcd_pci_probe and modify the callers
ehci/ohci/xhci/uhci to pass hc_driver as argument and freeup the
driver_data used

Tested xhci driver on Dragon-board RB3, compile tested ehci, ohci and
uhci.

Suggested-by: Mathias Nyman <mathias.nyman@linux.intel.com>
[For all but the xHCI parts]
Acked-by: Alan Stern <stern@rowland.harvard.edu>
[For the xhci part]
Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
drivers/usb/core/hcd-pci.c | 7 ++++---
drivers/usb/host/ehci-pci.c | 6 ++----
drivers/usb/host/ohci-pci.c | 9 ++++++---
drivers/usb/host/uhci-pci.c | 8 ++++++--
drivers/usb/host/xhci-pci.c | 14 +++++---------
include/linux/usb/hcd.h | 3 ++-
6 files changed, 25 insertions(+), 22 deletions(-)

diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index f0a259937da8..1547aa6e5314 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -159,6 +159,7 @@ static void ehci_wait_for_companions(struct pci_dev *pdev, struct usb_hcd *hcd,
* usb_hcd_pci_probe - initialize PCI-based HCDs
* @dev: USB Host Controller being probed
* @id: pci hotplug id connecting controller to HCD framework
+ * @driver: USB HC driver handle
* Context: !in_interrupt()
*
* Allocates basic PCI resources for this USB host controller, and
@@ -169,9 +170,9 @@ static void ehci_wait_for_companions(struct pci_dev *pdev, struct usb_hcd *hcd,
*
* Return: 0 if successful.
*/
-int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
+int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id,
+ const struct hc_driver *driver)
{
- struct hc_driver *driver;
struct usb_hcd *hcd;
int retval;
int hcd_irq = 0;
@@ -181,7 +182,7 @@ int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)

if (!id)
return -EINVAL;
- driver = (struct hc_driver *)id->driver_data;
+
if (!driver)
return -EINVAL;

diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index 1a48ab1bd3b2..3c3820ad9092 100644
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -360,23 +360,21 @@ static int ehci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
if (is_bypassed_id(pdev))
return -ENODEV;
- return usb_hcd_pci_probe(pdev, id);
+ return usb_hcd_pci_probe(pdev, id, &ehci_pci_hc_driver);
}

static void ehci_pci_remove(struct pci_dev *pdev)
{
pci_clear_mwi(pdev);
- usb_hcd_pci_remove(pdev);
+ usb_hcd_pci_remove(pdev);
}

/* PCI driver selection metadata; PCI hotplugging uses this */
static const struct pci_device_id pci_ids [] = { {
/* handle any USB 2.0 EHCI controller */
PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_EHCI, ~0),
- .driver_data = (unsigned long) &ehci_pci_hc_driver,
}, {
PCI_VDEVICE(STMICRO, PCI_DEVICE_ID_STMICRO_USB_HOST),
- .driver_data = (unsigned long) &ehci_pci_hc_driver,
},
{ /* end: all zeroes */ }
};
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index 22117a6aeb4a..585222af24ff 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -277,21 +277,24 @@ static const struct ohci_driver_overrides pci_overrides __initconst = {
static const struct pci_device_id pci_ids[] = { {
/* handle any USB OHCI controller */
PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_OHCI, ~0),
- .driver_data = (unsigned long) &ohci_pci_hc_driver,
}, {
/* The device in the ConneXT I/O hub has no class reg */
PCI_VDEVICE(STMICRO, PCI_DEVICE_ID_STMICRO_USB_OHCI),
- .driver_data = (unsigned long) &ohci_pci_hc_driver,
}, { /* end: all zeroes */ }
};
MODULE_DEVICE_TABLE (pci, pci_ids);

+static int ohci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
+{
+ return usb_hcd_pci_probe(dev, id, &ohci_pci_hc_driver);
+}
+
/* pci driver glue; this is a "new style" PCI driver module */
static struct pci_driver ohci_pci_driver = {
.name = hcd_name,
.id_table = pci_ids,

- .probe = usb_hcd_pci_probe,
+ .probe = ohci_pci_probe,
.remove = usb_hcd_pci_remove,
.shutdown = usb_hcd_pci_shutdown,

diff --git a/drivers/usb/host/uhci-pci.c b/drivers/usb/host/uhci-pci.c
index 957c87efc746..9b88745d247f 100644
--- a/drivers/usb/host/uhci-pci.c
+++ b/drivers/usb/host/uhci-pci.c
@@ -287,17 +287,21 @@ static const struct hc_driver uhci_driver = {
static const struct pci_device_id uhci_pci_ids[] = { {
/* handle any USB UHCI controller */
PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_UHCI, ~0),
- .driver_data = (unsigned long) &uhci_driver,
}, { /* end: all zeroes */ }
};

MODULE_DEVICE_TABLE(pci, uhci_pci_ids);

+static int uhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
+{
+ return usb_hcd_pci_probe(dev, id, &uhci_driver);
+}
+
static struct pci_driver uhci_pci_driver = {
.name = hcd_name,
.id_table = uhci_pci_ids,

- .probe = usb_hcd_pci_probe,
+ .probe = uhci_pci_probe,
.remove = usb_hcd_pci_remove,
.shutdown = uhci_shutdown,

diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 766b74723e64..b6c2f5c530e3 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -327,11 +327,8 @@ static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
int retval;
struct xhci_hcd *xhci;
- struct hc_driver *driver;
struct usb_hcd *hcd;

- driver = (struct hc_driver *)id->driver_data;
-
/* Prevent runtime suspending between USB-2 and USB-3 initialization */
pm_runtime_get_noresume(&dev->dev);

@@ -341,7 +338,7 @@ static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
* to say USB 2.0, but I'm not sure what the implications would be in
* the other parts of the HCD code.
*/
- retval = usb_hcd_pci_probe(dev, id);
+ retval = usb_hcd_pci_probe(dev, id, &xhci_pci_hc_driver);

if (retval)
goto put_runtime_pm;
@@ -349,8 +346,8 @@ static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
/* USB 2.0 roothub is stored in the PCI device now. */
hcd = dev_get_drvdata(&dev->dev);
xhci = hcd_to_xhci(hcd);
- xhci->shared_hcd = usb_create_shared_hcd(driver, &dev->dev,
- pci_name(dev), hcd);
+ xhci->shared_hcd = usb_create_shared_hcd(&xhci_pci_hc_driver, &dev->dev,
+ pci_name(dev), hcd);
if (!xhci->shared_hcd) {
retval = -ENOMEM;
goto dealloc_usb2_hcd;
@@ -544,10 +541,9 @@ static void xhci_pci_shutdown(struct usb_hcd *hcd)
/*-------------------------------------------------------------------------*/

/* PCI driver selection metadata; PCI hotplugging uses this */
-static const struct pci_device_id pci_ids[] = { {
+static const struct pci_device_id pci_ids[] = {
/* handle any USB 3.0 xHCI controller */
- PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0),
- .driver_data = (unsigned long) &xhci_pci_hc_driver,
+ { PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0),
},
{ /* end: all zeroes */ }
};
diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h
index e12105ed3834..3dbb42c637c1 100644
--- a/include/linux/usb/hcd.h
+++ b/include/linux/usb/hcd.h
@@ -479,7 +479,8 @@ extern void usb_hcd_platform_shutdown(struct platform_device *dev);
struct pci_dev;
struct pci_device_id;
extern int usb_hcd_pci_probe(struct pci_dev *dev,
- const struct pci_device_id *id);
+ const struct pci_device_id *id,
+ const struct hc_driver *driver);
extern void usb_hcd_pci_remove(struct pci_dev *dev);
extern void usb_hcd_pci_shutdown(struct pci_dev *dev);

--
2.25.4