ARM: Kirkwood: increase atomic coherent pool size

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 <[email protected]> Signed-off-by: Marek Szyprowski <[email protected]> Acked-by: Jason Cooper <[email protected]>
dokyukim · Aug 28, 2012 · cb01b63 · cb01b63
1 parent fb71285
commit cb01b63
Showing 1 changed file with 7 additions and 0 deletions.
diff --git 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;