+ Paul, Benoit, Rajendra
On Tue, Aug 9, 2011 at 2:26 PM, Luciano Coelho <coelho@xxxxxx> wrote:
> I'm again getting a very similar oops with 3.1-rc1 on my pandaboard:
>
> [ 2.054351] usbcore: registered new interface driver cdc_ncm
> [ 2.061431] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
> [ 2.068664] Unhandled fault: imprecise external abort (0x1406) at 0x00000000
> [ 2.076110] Internal error: : 1406 [#1] SMP
> [ 2.080505] Modules linked in:
> [ 2.083709] CPU: 0 Not tainted (3.1.0-rc1-wl+ #283)
> [ 2.089233] PC is at omap_usbhs_enable+0x148/0x590
> [ 2.094299] LR is at trace_hardirqs_off+0x14/0x18
...
> [ 2.310150] [<c02a8640>] (omap_usbhs_enable+0x148/0x590) from [<c0321d60>] (ehci_hcd_omap_probe+0x1b4/0x568)
> [ 2.320526] [<c0321d60>] (ehci_hcd_omap_probe+0x1b4/0x568) from [<c0298cfc>] (platform_drv_probe+0x24/0x28)
> [ 2.330780] [<c0298cfc>] (platform_drv_probe+0x24/0x28) from [<c0297650>] (driver_probe_device+0x158/0x27c)
> [ 2.341033] [<c0297650>] (driver_probe_device+0x158/0x27c) from [<c02977ec>] (__driver_attach+0x78/0x9c)
> [ 2.351043] [<c02977ec>] (__driver_attach+0x78/0x9c) from [<c0296c00>] (bus_for_each_dev+0x5c/0x8c)
> [ 2.360565] [<c0296c00>] (bus_for_each_dev+0x5c/0x8c) from [<c0297334>] (driver_attach+0x28/0x30)
> [ 2.369903] [<c0297334>] (driver_attach+0x28/0x30) from [<c02963ec>] (bus_add_driver+0xd8/0x260)
> [ 2.379180] [<c02963ec>] (bus_add_driver+0xd8/0x260) from [<c0297f00>] (driver_register+0xb8/0x144)
> [ 2.388702] [<c0297f00>] (driver_register+0xb8/0x144) from [<c02991e0>] (platform_driver_register+0x54/0x68)
> [ 2.399047] [<c02991e0>] (platform_driver_register+0x54/0x68) from [<c069904c>] (ehci_hcd_init+0xa8/0xfc)
> [ 2.409149] [<c069904c>] (ehci_hcd_init+0xa8/0xfc) from [<c0008854>] (do_one_initcall+0xa8/0x17c)
> [ 2.418487] [<c0008854>] (do_one_initcall+0xa8/0x17c) from [<c06792d4>] (kernel_init+0x88/0x134)
> [ 2.427764] [<c06792d4>] (kernel_init+0x88/0x134) from [<c0014ba0>] (kernel_thread_exit+0x0/0x8)
I get this too.
> Any clues?
Reverting 665d001338b494d6d62810aa99b4c0fa1a0884b9 "OMAP2+: hwmod:
Follow the recommended PRCM module enable sequence" fixes this for me.
More specifically, this hunk alone seems to do the trick:
diff --git a/arch/arm/mach-omap2/clock44xx_data.c b/arch/arm/mach-omap2/clock44x
index 2af0e3f..12d22a8 100644
--- a/arch/arm/mach-omap2/clock44xx_data.c
+++ b/arch/arm/mach-omap2/clock44xx_data.c
@@ -3379,7 +3379,6 @@ int __init omap4xxx_clk_init(void)
}
clk_init(&omap2_clk_functions);
- omap2_clk_disable_clkdm_control();
for (c = omap44xx_clks; c < omap44xx_clks + ARRAY_SIZE(omap44xx_clks);
c++)
I'm not suggesting this is anyway near a real fix, but hopefully it
will help pin-point the problem (clock44xx_data.c changes ?).
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