On Fri, 03 Aug 2018, Guenter Roeck wrote:
> Instantiating the sm501 OHCI subdevice results in a kernel warning.
>
> sm501-usb sm501-usb: SM501 OHCI
> sm501-usb sm501-usb: new USB bus registered, assigned bus number 1
> WARNING: CPU: 0 PID: 1 at ./include/linux/dma-mapping.h:516
> ohci_init+0x194/0x2d8
> Modules linked in:
>
> CPU: 0 PID: 1 Comm: swapper Tainted: G W
> 4.18.0-rc7-00178-g0b5b1f9a78b5 #1
> PC is at ohci_init+0x194/0x2d8
> PR is at ohci_init+0x168/0x2d8
> PC : 8c27844c SP : 8f81dd94 SR : 40008001
> TEA : 29613060
> R0 : 00000000 R1 : 00000000 R2 : 00000000 R3 : 00000202
> R4 : 8fa98b88 R5 : 8c277e68 R6 : 00000000 R7 : 00000000
> R8 : 8f965814 R9 : 8c388100 R10 : 8fa98800 R11 : 8fa98928
> R12 : 8c48302c R13 : 8fa98920 R14 : 8c48302c
> MACH: 00000096 MACL: 0000017c GBR : 00000000 PR : 8c278420
>
> Call trace:
> [<(ptrval)>] usb_add_hcd+0x1e8/0x6ec
> [<(ptrval)>] _dev_info+0x0/0x54
> [<(ptrval)>] arch_local_save_flags+0x0/0x8
> [<(ptrval)>] arch_local_irq_restore+0x0/0x24
> [<(ptrval)>] ohci_hcd_sm501_drv_probe+0x114/0x2d8
> ...
>
> Initialize coherent_dma_mask when creating SM501 subdevices to fix
> the problem.
>
> Fixes: b6d6454fdb66f ("mfd: SM501 core driver")
> Signed-off-by: Guenter Roeck <li...@roeck-us.net>
> ---
> drivers/mfd/sm501.c | 1 +
> 1 file changed, 1 insertion(+)
Applied, thanks.
--
Lee Jones [李琼斯]
Linaro Services Technical Lead
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