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| author |   Fabio Estevam <fabio.estevam@freescale.com> | 2013-09-28 00:05:34 -0300 |
|---|---|---|
| committer |   Felipe Balbi <balbi@ti.com> | 2013-10-04 09:44:43 -0500 |
| commit | f8cffc84a2ff8efc2ecca6128485877109e499f5 (patch) | |
| tree | 80f10d5cd4ff6c7d324ed55ccbe17a1ccff7d87a /drivers/usb/gadget/udc-core.c | |
| parent | ARM: OMAP2+: usb-host: Adapt to USB phy-nop RESET line changes (diff) | |
| download | linux-dev-f8cffc84a2ff8efc2ecca6128485877109e499f5.tar.xz linux-dev-f8cffc84a2ff8efc2ecca6128485877109e499f5.zip | |
usb: gadget: udc-core: Do not report -EISNAM error from gadgetfs
When mounting a gadgetfs the following error message is seen:
$ modprobe gadgetfs
gadgetfs: USB Gadget filesystem, version 24 Aug 2004
$ mkdir /dev/gadget
$ mount -t gadgetfs none /dev/gadget
nop ci_hdrc.0: failed to start (null): -120
The error comes from gadgetfs_probe(), which returns -EISNAM (-120).
As Alan Stern explains[1], this is the normal behavior:
"It is a temporary measure, used only when the file system is set up
initially. The real bind routine is gadgetfs_bind(), which gets called
when userspace configures the gadget.
In short, this is how it is intended to work. It isn't a bug."
[1] http://marc.info/?l=linux-usb&m=138029668707075&w=2
So in order to prevent the error message, do not report EISNAM as an error.
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/gadget/udc-core.c')
| -rw-r--r-- | drivers/usb/gadget/udc-core.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/gadget/udc-core.c b/drivers/usb/gadget/udc-core.c index 59891b1c48fc..27768a7d986a 100644 --- a/drivers/usb/gadget/udc-core.c +++ b/drivers/usb/gadget/udc-core.c @@ -356,7 +356,8 @@ static int udc_bind_to_driver(struct usb_udc *udc, struct usb_gadget_driver *dri kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE); return 0; err1: - dev_err(&udc->dev, "failed to start %s: %d\n", + if (ret != -EISNAM) + dev_err(&udc->dev, "failed to start %s: %d\n", udc->driver->function, ret); udc->driver = NULL; udc->dev.driver = NULL; |