RE: [PATCH] i2c: tegra: Fix i2c-tegra DMA config option processing

From: Akhil R
Date: Sun Aug 06 2023 - 10:21:58 EST


>
> BTW...
>
> On Thu, Aug 03, 2023 at 05:10:02PM +0000, Parker Newman wrote:
> >
>
> you have a blank line here.
>
> > This patch fixes the Tegra DMA config option processing in the
> > i2c-tegra driver.
> >
> > Tegra processors prior to Tegra186 used APB DMA for I2C requiring
> > CONFIG_TEGRA20_APB_DMA=y while Tegra186 and later use GPC DMA
> > requiring CONFIG_TEGRA186_GPC_DMA=y.
> >
> > The check for if the processor uses APB DMA is inverted and so the
> > wrong DMA config options are checked.
> >
> > This means if CONFIG_TEGRA20_APB_DMA=y but
> CONFIG_TEGRA186_GPC_DMA=n
> > with a Tegra186 or later processor the driver will incorrectly think
> > DMA is enabled and attempt to request DMA channels that will never be
> > availible, leaving the driver in a perpetual EPROBE_DEFER state.
> >
> > Signed-off-by: Parker Newman <pnewman@xxxxxxxxxxxxxxx>
>
> As this is a fix you also need to add
>
> Fixes: 48cb6356fae1 ("i2c: tegra: Add GPCDMA support")
> Cc: Akhil R <akhilrajeev@xxxxxxxxxx>
> Cc: <stable@xxxxxxxxxxxxxxx> # v6.1+
>
> Cc'eing Akhil as well for his opinion on this.
The fix looks valid to me. Must have been a typo there.

Regards,
Akhil