* Russell King - ARM Linux <linux@xxxxxxxxxxxxxxxx> [120208 08:05]: > When the PMIC is not found, voltdm->pmic will be NULL. vp.c's > initialization function tries to dereferences this, which causes an > oops: > > Unable to handle kernel NULL pointer dereference at virtual address 00000000 > pgd = c0004000 > [00000000] *pgd=00000000 > Internal error: Oops: 5 [#1] PREEMPT > Modules linked in: > CPU: 0 Not tainted (3.3.0-rc2+ #204) > PC is at omap_vp_init+0x5c/0x15c > LR is at omap_vp_init+0x58/0x15c > pc : [<c03db880>] lr : [<c03db87c>] psr: 60000013 > sp : c181ff30 ip : c181ff68 fp : c181ff64 > r10: c0407808 r9 : c040786c r8 : c0407814 > r7 : c0026868 r6 : c00264fc r5 : c040ad6c r4 : 00000000 > r3 : 00000040 r2 : 000032c8 r1 : 0000fa00 r0 : 000032c8 > Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel > Control: 10c5387d Table: 80004019 DAC: 00000015 > Process swapper (pid: 1, stack limit = 0xc181e2e8) > Stack: (0xc181ff30 to 0xc1820000) > ff20: c0381d00 c02e9c6d c0383582 c040786c > ff40: c040ad6c c00264fc c0026868 c0407814 00000000 c03d9de4 c181ff8c c181ff68 > ff60: c03db448 c03db830 c02e982c c03fdfb8 c03fe004 c0039988 00000013 00000000 > ff80: c181ff9c c181ff90 c03d9df8 c03db390 c181ffdc c181ffa0 c0008798 c03d9df0 > ffa0: c181ffc4 c181ffb0 c0055a44 c0187050 c0039988 c03fdfb8 c03fe004 c0039988 > ffc0: 00000013 00000000 00000000 00000000 c181fff4 c181ffe0 c03d1284 c0008708 > ffe0: 00000000 c03d1208 00000000 c181fff8 c0039988 c03d1214 1077ce40 01f7ee08 > Backtrace: > [<c03db824>] (omap_vp_init+0x0/0x15c) from [<c03db448>] (omap_voltage_late_init+0xc4/0xfc) > [<c03db384>] (omap_voltage_late_init+0x0/0xfc) from [<c03d9df8>] (omap2_common_pm_late_init+0x14/0x54) > r8:00000000 r7:00000013 r6:c0039988 r5:c03fe004 r4:c03fdfb8 > [<c03d9de4>] (omap2_common_pm_late_init+0x0/0x54) from [<c0008798>] (do_one_initcall+0x9c/0x164) > [<c00086fc>] (do_one_initcall+0x0/0x164) from [<c03d1284>] (kernel_init+0x7c/0x120) > [<c03d1208>] (kernel_init+0x0/0x120) from [<c0039988>] (do_exit+0x0/0x2cc) > r5:c03d1208 r4:00000000 > Code: e5ca300b e5900034 ebf69027 e5994024 (e5941000) > ---[ end trace aed617dddaf32c3d ]--- > Kernel panic - not syncing: Attempted to kill init! > > Signed-off-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx> This is better than Kevin's earlier patch because of the descriptive error: Acked-by: Tony Lindgren <tony@xxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
