Re: [PATCH] dma-pool: Do not allocate pool memory from CMA

Amit Pundir
2020-07-31T07:20:33Z

On Fri, 31 Jul 2020 at 06:40, Nathan Chancellor
<natechancellor@gmail.com> wrote:
>
> On Tue, Jul 28, 2020 at 12:09:18PM +0200, Christoph Hellwig wrote:
> > Ok, I found a slight bug that wasn't intended. I wanted to make sure
> > we can always fall back to a lower pool, but got that wrong. Should be
> > fixed in the next version.
>
> Hi Christoph and Nicolas,
>
> Did a version of that series ever get send out? I am coming into the
> conversation late but I am running into an issue with the Raspberry Pi 4
> not booting on linux-next, which appears to be due to this patch now in
> mainline as commit d9765e41d8e9 ("dma-pool: do not allocate pool memory
> from CMA") combined with
> https://lore.kernel.org/lkml/20200725014529.1143208-2-jiaxun.yang@flygoat.com/
> in -next:
>
> [ 1.423163] raspberrypi-firmware soc:firmware: Request 0x00000001 returned status 0x00000000
> [ 1.431883] raspberrypi-firmware soc:firmware: Request 0x00030046 returned status 0x00000000
> [ 1.443888] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [ 1.452527] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 0 config (-22 80)
> [ 1.460836] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [ 1.469445] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 1 config (-22 81)
> [ 1.477735] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [ 1.486350] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 2 config (-22 82)
> [ 1.494639] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [ 1.503246] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 3 config (-22 83)
> [ 1.511529] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [ 1.520131] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 4 config (-22 84)
> [ 1.528414] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [ 1.537017] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 5 config (-22 85)
> [ 1.545299] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [ 1.553903] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 6 config (-22 86)
> [ 1.562184] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [ 1.570787] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 7 config (-22 87)
> [ 1.579897] raspberrypi-firmware soc:firmware: Request 0x00030030 returned status 0x00000000
> [ 1.589419] raspberrypi-firmware soc:firmware: Request 0x00028001 returned status 0x00000000
> [ 1.599391] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [ 1.608018] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 1 config (-22 81)
> [ 1.616313] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [ 1.624932] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 1 config (-22 81)
> [ 1.633195] pwrseq_simple: probe of wifi-pwrseq failed with error -22
> [ 1.643904] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [ 1.652544] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 2 config (-22 82)
> [ 1.660839] raspberrypi-firmware soc:firmware: Request 0x00030041 returned status 0x00000000
> [ 1.669446] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 2 state (-22 82)
> [ 1.677727] leds-gpio: probe of leds failed with error -22
> [ 1.683735] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [ 1.692346] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 6 config (-22 86)
> [ 1.700636] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [ 1.709240] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 6 config (-22 86)
> [ 1.717496] reg-fixed-voltage: probe of sd_vcc_reg failed with error -22
> [ 1.725546] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [ 1.734176] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 4 config (-22 84)
> [ 1.742465] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [ 1.751072] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 4 config (-22 84)
> [ 1.759332] gpio-regulator: probe of sd_io_1v8_reg failed with error -22
> [ 1.768042] raspberrypi-firmware soc:firmware: Request 0x00028001 returned status 0x00000000
> [ 1.780871] ALSA device list:
> [ 1.783960] No soundcards found.
> [ 1.787633] Waiting for root device PARTUUID=45a8dd8a-02...
>
> I am unsure if it is related to the issue that Amit is having or
> if that makes sense at all but I can reliably reproduce it.
>
> v5.8-rc1: OK
> v5.8-rc1 + d9765e41d8e9e: OK
> v5.8-rc1 + "of_address: Add bus type match for pci ranges parser": OK
> v5.8-rc1 + both: BROKEN
>
> I wanted to test the series to see if this fixes anything. If you would
> prefer a different thread for this or further information, please let
> me know.

Hi Nathan,

Here is the patch series:
https://lists.linuxfoundation.org/pipermail/iommu/2020-July/047008.html
https://lists.linuxfoundation.org/pipermail/iommu/2020-July/047010.html

I hope it works for you, it didn't work for me. More details in this
thread here:
https://lists.linuxfoundation.org/pipermail/iommu/2020-July/047009.html

Regards,
Amit Pundir

>
> Cheers,
> Nathan