From 85044eb08d0a37b1b6bcb3504bfd660a85ba5b7b Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Tue, 20 Jul 2021 14:38:23 +0100 Subject: [PATCH] of: Return success from of_dma_set_restricted_buffer() when !OF_ADDRESS When CONFIG_OF_ADDRESS=n, of_dma_set_restricted_buffer() returns -ENODEV and breaks the boot for sparc[64] machines. Return 0 instead, since the function is essentially a glorified NOP in this configuration. Cc: Claire Chang Cc: Konrad Rzeszutek Wilk Reported-by: Guenter Roeck Suggested-by: Robin Murphy Tested-by: Guenter Roeck Tested-by: Claire Chang Reviewed-by: Christoph Hellwig Link: https://lore.kernel.org/r/20210702030807.GA2685166@roeck-us.net Fixes: fec9b625095f ("of: Add plumbing for restricted DMA pool") Signed-off-by: Will Deacon Signed-off-by: Konrad Rzeszutek Wilk --- drivers/of/of_private.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/of/of_private.h b/drivers/of/of_private.h index 376462798f7e7..f557bd22b0cf0 100644 --- a/drivers/of/of_private.h +++ b/drivers/of/of_private.h @@ -173,7 +173,8 @@ static inline int of_dma_get_range(struct device_node *np, static inline int of_dma_set_restricted_buffer(struct device *dev, struct device_node *np) { - return -ENODEV; + /* Do nothing, successfully. */ + return 0; } #endif