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Subject[patch 34/46] USB: remove optional bus bindings in isp1760, fixing runtime warning
2.6.27-stable review patch.  If anyone has any objections, please let us know.


From: Sebastian Andrzej Siewior <>

commit ff30bf1ca4b548c0928dae6bfce89458b95e5bf4 upstream.

Roland Reported the following:
| kmem_cache_create: duplicate cache isp1760_qtd
| Pid: 461, comm: modprobe Tainted: G W 2.6.28-rc2-git3-default #4
| Call Trace:
| [<c017540e>] kmem_cache_create+0xc9/0x3a3
| [<c0159a8d>] free_pages_bulk+0x16c/0x1c9
| [<f165c05f>] isp1760_init+0x0/0xb [isp1760]
| [<f165c018>] init_kmem_once+0x18/0x5f [isp1760]
| [<f165c064>] isp1760_init+0x5/0xb [isp1760]
| [<c010113d>] _stext+0x4d/0x148
| [<c0142936>] load_module+0x12cd/0x142e
| [<c01743c4>] kmem_cache_destroy+0x0/0xd7
| [<c0142b1e>] sys_init_module+0x87/0x176
| [<c01039eb>] sysenter_do_call+0x12/0x2f

The reason, is that ret is initialized with ENODEV instead of 0 _or_
the kmem cache is not freed in error case with no bus binding.

The difference between OF+PCI and OF only is
| 15148 804 32 15984 3e70 isp1760-of-pci.o
| 13748 676 8 14432 3860 isp1760-of.o

about 1.5 KiB.

Until there is a checkbox where the user *must* select atleast one item,
and may select multiple entries I don't make it selectable anymore.
Having a driver which can't be used under any circumstances is broken
anyway and I've seen distros shipping it that way.

Reported-by: Roland Kletzing <>
Signed-off-by: Sebastian Andrzej Siewior <>
Signed-off-by: Greg Kroah-Hartman <>

drivers/usb/host/Kconfig | 23 ++++++-----------------
drivers/usb/host/isp1760-if.c | 22 +++++++++++-----------
2 files changed, 17 insertions(+), 28 deletions(-)

--- a/drivers/usb/host/isp1760-if.c
+++ b/drivers/usb/host/isp1760-if.c
@@ -14,16 +14,16 @@
#include "../core/hcd.h"
#include "isp1760-hcd.h"

-#ifdef CONFIG_USB_ISP1760_OF
#include <linux/of.h>
#include <linux/of_platform.h>

-#ifdef CONFIG_USB_ISP1760_PCI
+#ifdef CONFIG_PCI
#include <linux/pci.h>

-#ifdef CONFIG_USB_ISP1760_OF
static int of_isp1760_probe(struct of_device *dev,
const struct of_device_id *match)
@@ -128,7 +128,7 @@ static struct of_platform_driver isp1760

-#ifdef CONFIG_USB_ISP1760_PCI
+#ifdef CONFIG_PCI
static u32 nxp_pci_io_base;
static u32 iolength;
static u32 pci_mem_phy0;
@@ -287,28 +287,28 @@ static struct pci_driver isp1761_pci_dri

static int __init isp1760_init(void)
- int ret = -ENODEV;
+ int ret;


-#ifdef CONFIG_USB_ISP1760_OF
ret = of_register_platform_driver(&isp1760_of_driver);
if (ret) {
return ret;
-#ifdef CONFIG_USB_ISP1760_PCI
+#ifdef CONFIG_PCI
ret = pci_register_driver(&isp1761_pci_driver);
if (ret)
goto unreg_of;
return ret;

-#ifdef CONFIG_USB_ISP1760_PCI
+#ifdef CONFIG_PCI
-#ifdef CONFIG_USB_ISP1760_OF
@@ -318,10 +318,10 @@ module_init(isp1760_init);

static void __exit isp1760_exit(void)
-#ifdef CONFIG_USB_ISP1760_OF
-#ifdef CONFIG_USB_ISP1760_PCI
+#ifdef CONFIG_PCI
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -110,29 +110,18 @@ config USB_ISP116X_HCD

config USB_ISP1760_HCD
tristate "ISP 1760 HCD support"
- depends on USB && EXPERIMENTAL
+ depends on USB && EXPERIMENTAL && (PCI || PPC_OF)
The ISP1760 chip is a USB 2.0 host controller.

This driver does not support isochronous transfers or OTG.
+ This USB controller is usually attached to a non-DMA-Master
+ capable bus. NXP's eval kit brings this chip on PCI card
+ where the chip itself is behind a PLB to simulate such
+ a bus.

To compile this driver as a module, choose M here: the
- module will be called isp1760-hcd.
-config USB_ISP1760_PCI
- bool "Support for the PCI bus"
- depends on USB_ISP1760_HCD && PCI
- ---help---
- Enables support for the device present on the PCI bus.
- This should only be required if you happen to have the eval kit from
- NXP and you are going to test it.
-config USB_ISP1760_OF
- bool "Support for the OF platform bus"
- depends on USB_ISP1760_HCD && PPC_OF
- ---help---
- Enables support for the device present on the PowerPC
- OpenFirmware platform bus.
+ module will be called isp1760.

tristate "OHCI HCD support"

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