diff options
| author | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2014-02-27 16:42:13 +0100 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2014-03-05 14:40:10 -0600 |
| commit | fb0e139d93f50f0cfa3ff4377d34c70dbc542797 (patch) | |
| tree | dcca8e716f3b018d1009ca1769c1cbe297a36d60 /drivers/usb/gadget/atmel_usba_udc.c | |
| parent | 47d1845ffac0af9e4b439277fee50b62aed650a7 (diff) | |
| download | linux-fb0e139d93f50f0cfa3ff4377d34c70dbc542797.tar.bz2 | |
usb: gadget: atmel_usba: fix crash when no endpoint are specified
If no endpoints are present in the device tree, the kernel will crash with the
following error:
Unable to handle kernel paging request at virtual address 00101008
[...]
[<c0222ff4>] (composite_dev_prepare) from [<c022326c>] (composite_bind+0x5c/0x190)
[<c022326c>] (composite_bind) from [<c021ff8c>] (udc_bind_to_driver+0x48/0xf0)
[<c021ff8c>] (udc_bind_to_driver) from [<c02208e0>] (usb_gadget_probe_driver+0x7c/0xa0)
[<c02208e0>] (usb_gadget_probe_driver) from [<c0008970>] (do_one_initcall+0x94/0x140)
[<c0008970>] (do_one_initcall) from [<c04b4b50>] (kernel_init_freeable+0xec/0x1b4)
[<c04b4b50>] (kernel_init_freeable) from [<c0376cc4>] (kernel_init+0x8/0xe4)
[<c0376cc4>] (kernel_init) from [<c0009590>] (ret_from_fork+0x14/0x24)
Code: e5950014 e1a04001 e5902008 e3a010d0 (e5922008)
---[ end trace 35c74bdd89b373d0 ]---
Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
This checks for that case and returns an error, not allowing the driver to be
loaded with no endpoints.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/gadget/atmel_usba_udc.c')
| -rw-r--r-- | drivers/usb/gadget/atmel_usba_udc.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/gadget/atmel_usba_udc.c b/drivers/usb/gadget/atmel_usba_udc.c index 18a44919ae9f..e57991edcf67 100644 --- a/drivers/usb/gadget/atmel_usba_udc.c +++ b/drivers/usb/gadget/atmel_usba_udc.c @@ -1914,6 +1914,12 @@ static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev, i++; } + if (i == 0) { + dev_err(&pdev->dev, "of_probe: no endpoint specified\n"); + ret = -EINVAL; + goto err; + } + return eps; err: return ERR_PTR(ret); |