On Thu, Oct 09, 2014 at 10:25:20AM +0530, George Cherian wrote: > > On 10/08/2014 11:59 PM, Sebastian Andrzej Siewior wrote: > >So testing managed to configure musb in DMA mode but not load the > >matching cppi41 driver for DMA. This results in > > > >|musb-hdrc musb-hdrc.0.auto: Failed to request rx1. > >|musb-hdrc musb-hdrc.0.auto: musb_init_controller failed with status -517 > >|platform musb-hdrc.0.auto: Driver musb-hdrc requests probe deferral > > > >which is "okay". Once the driver is loaded we re-try probing and > >everyone is happy. Until then if you try suspend say > > echo mem > /sys/power/state > >then you go boom > > > >|Unable to handle kernel NULL pointer dereference at virtual address 000003a4 > >|pgd = cf50c000 > >|[000003a4] *pgd=8f6a3831, *pte=00000000, *ppte=00000000 > >|Internal error: Oops: 17 [#1] ARM > >|PC is at dsps_suspend+0x18/0x9c [musb_dsps] > >|LR is at dsps_suspend+0x18/0x9c [musb_dsps] > >|pc : [<bf08e268>] lr : [<bf08e268>] psr: a0000013 > >|sp : cbd97e00 ip : c0af4394 fp : 00000000 > >|r10: c0831d90 r9 : 00000002 r8 : cf6da410 > >|r7 : c03ba4dc r6 : bf08f224 r5 : 00000000 r4 : cbc5fcd0 > >|r3 : bf08e250 r2 : bf08f264 r1 : cf6da410 r0 : 00000000 > >|[<bf08e268>] (dsps_suspend [musb_dsps]) from [<c03ba508>] (platform_pm_suspend+0x2c/0x54) > >|Code: e1a04000 e9900041 e2800010 eb4caa8e (e59053a4) > > > >because platform_get_drvdata(glue->musb) returns a NULL pointer as long as the > >device is not fully probed. > > > >Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> > Tested-by: George Cherian <george.cherian@xxxxxx> Care to rebase on testing/next ? It doesn't apply: checking file drivers/usb/musb/musb_dsps.c Hunk #1 FAILED at 868. Hunk #2 succeeded at 887 (offset 1 line). 1 out of 2 hunks FAILED -- balbi
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