The default 256 KiB coherent pool may be too small for some of the Kirkwood devices, so increase it to make sure that devices will be able to allocate their buffers with GFP_ATOMIC flag.
Suggested-by: Josh Coombs josh.coombs@gmail.com Signed-off-by: Marek Szyprowski m.szyprowski@samsung.com --- arch/arm/mach-kirkwood/common.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-kirkwood/common.c b/arch/arm/mach-kirkwood/common.c index c4b64ad..d748f50 100644 --- a/arch/arm/mach-kirkwood/common.c +++ b/arch/arm/mach-kirkwood/common.c @@ -517,6 +517,13 @@ void __init kirkwood_wdt_init(void) void __init kirkwood_init_early(void) { orion_time_set_base(TIMER_VIRT_BASE); + + /* + * Some Kirkwood devices allocate their coherent buffers from atomic + * context. Increase size of atomic coherent pool to make sure such + * the allocations won't fail. + */ + init_dma_coherent_pool_size(SZ_1M); }
int kirkwood_tclk;