Andrew Morton writes: > > > Begin forwarded message: > > Date: Sat, 24 Sep 2005 17:21:07 +0200 > From: Bernhard Rosenkraenzer <bero@xxxxxxxxxxxx> > To: linux-kernel@xxxxxxxxxxxxxxx > Subject: NULL pointer dereference when loading the budget-av module [...] > [ 115.304801] Call Trace: > [ 115.304843] [<d08dcc33>] i2c_transfer+0x3e/0x50 [i2c_core] > [ 115.304889] [<ce83196a>] tda10021_attach+0x7c/0xca [tda10021] AFAIR, there is a bug in tda10021.c in tda10021_readreg() which references state->frontend.dvb->num This is fatal if the frontend is not at the probed address and thus not yet registered (no dvb entry set yet -> NULL pointer ...). This happens with some batches of KNC cards, probably the older ones? I got one of the old KNC prototypes. They are not properly supported by the linuxtv drivers. The wrong I2C addresses are scanned, which exposes the above bug, and changes in the config of the tda10021 from earlier this year screw up the signal timing for those cards (but seem to improve that of the current production cards?). Ralph
