diff options
| author | Parker Newman <pnewman@connecttech.com> | 2023-08-08 17:01:06 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-08-23 18:52:30 +0300 |
| commit | 3461e6492ca28253edfcd13d176d2b9b24c0ed53 (patch) | |
| tree | 75fbce07f9d8696e4cf98f7a4405bf93b9ed7ca6 /drivers/i2c | |
| parent | ba249011f6651952eef267f00f6086c8bac15049 (diff) | |
| download | linux-3461e6492ca28253edfcd13d176d2b9b24c0ed53.tar.xz | |
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>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-tegra.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index 2bc40f957e50..aa469b33ee2e 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -449,7 +449,7 @@ static int tegra_i2c_init_dma(struct tegra_i2c_dev *i2c_dev) if (i2c_dev->is_vi) return 0; - if (!i2c_dev->hw->has_apb_dma) { + if (i2c_dev->hw->has_apb_dma) { if (!IS_ENABLED(CONFIG_TEGRA20_APB_DMA)) { dev_dbg(i2c_dev->dev, "APB DMA support not enabled\n"); return 0; |