On Mon, 2007-06-18 at 18:15 +0100, Liam Girdwood wrote:
On Mon, 2007-06-18 at 12:07 -0500, Paul Kavan wrote:
I now have the linux-2.6.22-rc1 kernel booting correctly without the aSoC driver activated in .config. However, when I rebuild with the aSoC and then boot, I get the following crash:
.snip. Advanced Linux Sound Architecture Driver Version 1.0.14rc4 (Wed May 09 09:51:39 2007 UTC). ASoC version 0.13.0 Unable to handle kernel NULL pointer dereference at virtual address 00000001 pgd = c0004000 [00000001] *pgd=00000000 Internal error: Oops: 801 [#1] Modules linked in: CPU: 0 PC is at grh_ek_w6811_init+0x4c/0x11c LR is at __arm_ioremap_pfn+0x2cc/0x2ec
You have a NULL pointer dereference in grh_ek_w6811_init(), most likely to be ssc as the dai private data wont be set yet. i.e.
struct at91_ssc_periph *ssc = grh_ek_w6811_dai.cpu_dai->private_data;
Forgot to add the deref itself :-
ssc->base = ioremap(AT91SAM9260_BASE_SSC, SZ_16K);
ssc is probably NULL.
Liam