dvb-t: crash with smsmdtv/smsdvb (2.6.38.2)

Hi,

this happens on 2.6.38.2 (I had the problem in .37 too, therefore I upgraded) on an ARM machine (Guruplug ServerPlus) with my USB DVB-T Stick from Hauppauge ("WinTV Ministick") in use with the corresponding smsmdtv and smsdvb modules. The DVB-T Stick is 24/7 in use by vdr (http://www.tvdr.de). I get this crash only "every now and then", like, a couple of hours or a couple of days (but it comes, for sure). So I can only reproduce it by patience.

dmesg output:
--------------------------------------------------------------------------------------------------------------
[...]

Unable to handle kernel paging request at virtual address e1682000
pgd = df3fc000
[e1682000] *pgd=1f22e811, *pte=00000000, *ppte=00000000
Internal error: Oops: 7 [#1]
last sysfs file: /sys/devices/platform/orion-ehci.0/usb1/1-1/1-1.1/bcdDevice
Modules linked in: rfcomm l2cap xt_tcpudp iptable_filter ipt_addrtype ip_tables x_tables smsdvb dvb_core ir_lirc_codec smsusb lirc_dev smsmdtv rc_core pl2303 usbserial usb_storage btmrvl_sdio libertas_sdio btmrvl libertas bluetooth sg ehci_hcd
CPU: 0    Not tainted  (2.6.38.2 #1)
PC is at memcpy+0x188/0x3a4
LR is at 0xd95d0430
pc : [<c01d85a8>]    lr : [<d95d0430>]    psr: 20000013

sp : dbd73e90 ip : 7275626d fp : dbd73eb0
r10: e1681f14 r9 : 61482073 r8 : 614405f9
r7 : 00726567 r6 : 00ff4e57 r5 : 01003000 r4 : 00450270 r3 : 00d95d04 r2 : 00000100 r1 : e1681ff4 r0 : 42f78e60
Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
Control: 0005397f Table: 1f3fc000 DAC: 00000015 Process vdr (pid: 5708, stack limit = 0xdbd72270)

Stack: (0xdbd73e90 to 0xdbd74000)

3e80: 42f78d93 dbd72000 0000026d 00000000
3ea0: dbd73eb4 42f78d93 000004fc c01e137c ddcd0340 dbd7f5e0 000004fc e131c194 3ec0: 42f78d93 000004fc 000004fc dbd72000 dbd73f10 000004fc 00000000 bf0c06d0 3ee0: e131c194 e131c194 42f78d93 000004fc dbd73f04 bf0b7424 e131c1a8 00000800 3f00: 00000d28 db469740 df2fd2d4 df2fd318 00000013 df2fd2d4 0000c089 e131c140 3f20: 00000003 42f78d93 dcd56300 00000ffd e131c1b0 00000000 42f79dbc bf0b75bc 3f40: 00001000 dcd56300 42f78d90 dbd73f80 00001000 dbd72000 00000000 c009dbf4 3f60: dcd56300 42f78d90 dcd56300 42f78d90 00000000 00000000 00001000 c009dd08 3f80: 00000000 00000000 00001000 00000001 00000005 00001000 42f78d90 00000003 3fa0: c0029c04 c0029a80 00000005 00001000 00000005 42f78d90 00001000 00000005 3fc0: 00000005 00001000 42f78d90 00000003 42f78d20 00000012 42f79d90 42f79dbc 3fe0: 00000000 42f78cf8 400358cc 40036034 80000010 00000005 1fffe831 1fffec31

Code: f5d1f07c e8b100f0 e1a0342e e2522020 (e8b15300) 
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