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| author |   Florian Mickler <florian@mickler.org> | 2011-08-10 07:05:20 -0300 |
|---|---|---|
| committer |   Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-09-11 09:33:41 -0300 |
| commit | fc61ccd35fd59d5362d37c8bf9c0526c85086c84 (patch) | |
| tree | ef4a47ba5424d8b20637c0bdba47f5005835c6d7 /drivers/media | |
| parent | [media] nuvoton-cir: simplify raw IR sample handling (diff) | |
| download | linux-dev-fc61ccd35fd59d5362d37c8bf9c0526c85086c84.tar.xz linux-dev-fc61ccd35fd59d5362d37c8bf9c0526c85086c84.zip | |
[media] vp7045: fix buffer setup
dvb_usb_device_init calls the frontend_attach method of this driver which
uses vp7045_usb_ob. In order to have a buffer ready in vp7045_usb_op, it has to
be allocated before that happens.
Luckily we can use the whole private data as the buffer as it gets separately
allocated on the heap via kzalloc in dvb_usb_device_init and is thus apt for
use via usb_control_msg.
This fixes a
BUG: unable to handle kernel paging request at 0000000000001e78
reported by Tino Keitel and diagnosed by Dan Carpenter.
Cc: stable@kernel.org # For v3.0 and upper
Tested-by: Tino Keitel <tino.keitel@tikei.de>
Signed-off-by: Florian Mickler <florian@mickler.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/dvb/dvb-usb/vp7045.c | 26 |
1 files changed, 4 insertions, 22 deletions
diff --git a/drivers/media/dvb/dvb-usb/vp7045.c b/drivers/media/dvb/dvb-usb/vp7045.c index 3db89e3cb0bb..536c16c943bd 100644 --- a/drivers/media/dvb/dvb-usb/vp7045.c +++ b/drivers/media/dvb/dvb-usb/vp7045.c @@ -224,26 +224,8 @@ static struct dvb_usb_device_properties vp7045_properties; static int vp7045_usb_probe(struct usb_interface *intf, const struct usb_device_id *id) { - struct dvb_usb_device *d; - int ret = dvb_usb_device_init(intf, &vp7045_properties, - THIS_MODULE, &d, adapter_nr); - if (ret) - return ret; - - d->priv = kmalloc(20, GFP_KERNEL); - if (!d->priv) { - dvb_usb_device_exit(intf); - return -ENOMEM; - } - - return ret; -} - -static void vp7045_usb_disconnect(struct usb_interface *intf) -{ - struct dvb_usb_device *d = usb_get_intfdata(intf); - kfree(d->priv); - dvb_usb_device_exit(intf); + return dvb_usb_device_init(intf, &vp7045_properties, + THIS_MODULE, NULL, adapter_nr); } static struct usb_device_id vp7045_usb_table [] = { @@ -258,7 +240,7 @@ MODULE_DEVICE_TABLE(usb, vp7045_usb_table); static struct dvb_usb_device_properties vp7045_properties = { .usb_ctrl = CYPRESS_FX2, .firmware = "dvb-usb-vp7045-01.fw", - .size_of_priv = sizeof(u8 *), + .size_of_priv = 20, .num_adapters = 1, .adapter = { @@ -305,7 +287,7 @@ static struct dvb_usb_device_properties vp7045_properties = { static struct usb_driver vp7045_usb_driver = { .name = "dvb_usb_vp7045", .probe = vp7045_usb_probe, - .disconnect = vp7045_usb_disconnect, + .disconnect = dvb_usb_device_exit, .id_table = vp7045_usb_table, }; |