i2c: tegra: Fix i2c-tegra DMA config option processing
authorParker Newman <pnewman@connecttech.com>
Tue, 8 Aug 2023 14:01:06 +0000 (16:01 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 23 Aug 2023 15:52:30 +0000 (17:52 +0200)
commit3461e6492ca28253edfcd13d176d2b9b24c0ed53
tree75fbce07f9d8696e4cf98f7a4405bf93b9ed7ca6
parentba249011f6651952eef267f00f6086c8bac15049
i2c: tegra: Fix i2c-tegra DMA config option processing

commit 27ec43c77b5db780a56fc3a6d6de6bf2f74614f7 upstream.

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.

Fixes: 48cb6356fae1 ("i2c: tegra: Add GPCDMA support")
Signed-off-by: Parker Newman <pnewman@connecttech.com>
Acked-by: Andi Shyti <andi.shyti@kernel.org>
Acked-by: Akhil R <akhilrajeev@nvidia.com>
Link: https://lore.kernel.org/r/fcfcf9b3-c8c4-9b34-2ff8-cd60a3d490bd@connecttech.com
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/i2c/busses/i2c-tegra.c