The following commit makes the Tegra APB DMA engine fail to initialize
correctly: 0cf6230af909a86f81907455eca2a5c9b8f68fe6
ARM: tegra: Move tegra_common_init to tegra_init_early
The reason is that tegra_init_early_ calls tegra_dma_init which calls
request_threaded_irq, which fails since the IRQ hasn't yet been marked
valid; that only happens in tegra_init_irq, which gets called after
tegra_init_early.
This used to work OK, since tegra_init_early was tegra_common_init, which
got called after tegra_init_irq, basically from the beginning of
tegra_harmony_init.
Solve this by converting tegra_dma_init to a postcore_initcall. This makes
it execute late enough that IRQs are marked valid, and avoids having to
add it back to every machine's init function.
Signed-off-by: Stephen Warren <[email protected]>
---
v2: Dropped include of mach/dma.h from common.c
arch/arm/mach-tegra/common.c | 4 ----
arch/arm/mach-tegra/dma.c | 1 +
2 files changed, 1 insertions(+), 4 deletions(-)
diff --git a/arch/arm/mach-tegra/common.c b/arch/arm/mach-tegra/common.c
index 516e100..d5e3f89 100644
--- a/arch/arm/mach-tegra/common.c
+++ b/arch/arm/mach-tegra/common.c
@@ -25,7 +25,6 @@
#include <asm/hardware/cache-l2x0.h>
#include <mach/iomap.h>
-#include <mach/dma.h>
#include <mach/system.h>
#include "board.h"
@@ -81,7 +80,4 @@ void __init tegra_init_early(void)
tegra_init_clock();
tegra_clk_init_from_table(common_clk_init_table);
tegra_init_cache();
-#ifdef CONFIG_TEGRA_SYSTEM_DMA
- tegra_dma_init();
-#endif
}
diff --git a/arch/arm/mach-tegra/dma.c b/arch/arm/mach-tegra/dma.c
index 2d720f2..bd4f62a 100644
--- a/arch/arm/mach-tegra/dma.c
+++ b/arch/arm/mach-tegra/dma.c
@@ -743,6 +743,7 @@ fail:
}
return ret;
}
+postcore_initcall(tegra_dma_init);
#ifdef CONFIG_PM
static u32 apb_dma[5*TEGRA_SYSTEM_DMA_CH_NR + 3];
--
1.7.1
On Wed, Feb 23, 2011 at 9:41 AM, Stephen Warren <[email protected]> wrote:
> The following commit makes the Tegra APB DMA engine fail to initialize
> correctly: 0cf6230af909a86f81907455eca2a5c9b8f68fe6
> ARM: tegra: Move tegra_common_init to tegra_init_early
>
> The reason is that tegra_init_early_ calls tegra_dma_init which calls
> request_threaded_irq, which fails since the IRQ hasn't yet been marked
> valid; that only happens in tegra_init_irq, which gets called after
> tegra_init_early.
>
> This used to work OK, since tegra_init_early was tegra_common_init, which
> got called after tegra_init_irq, basically from the beginning of
> tegra_harmony_init.
>
> Solve this by converting tegra_dma_init to a postcore_initcall. This makes
> it execute late enough that IRQs are marked valid, and avoids having to
> add it back to every machine's init function.
>
> Signed-off-by: Stephen Warren <[email protected]>
Acked-by: Olof Johansson <[email protected]>