From 0e7264cc79a2d5c0ffa32c08d8f1cf84b2ec4fef Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Thu, 10 Jan 2013 10:52:57 +0200 Subject: [PATCH] dma: at_hdmac: check direction properly for cyclic transfers dma_transfer_direction is a normal enum. It means we can't usually use the values as bit fields. Let's adjust this check and move it above the usage of the direction parameter, due to the nature of the following usage of it. Signed-off-by: Andy Shevchenko Reviewed-by: Viresh Kumar Acked-by: Nicolas Ferre Signed-off-by: Vinod Koul --- drivers/dma/at_hdmac.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c index 13a02f4425b0..6e13f262139a 100644 --- a/drivers/dma/at_hdmac.c +++ b/drivers/dma/at_hdmac.c @@ -778,7 +778,7 @@ atc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, */ static int atc_dma_cyclic_check_values(unsigned int reg_width, dma_addr_t buf_addr, - size_t period_len, enum dma_transfer_direction direction) + size_t period_len) { if (period_len > (ATC_BTSIZE_MAX << reg_width)) goto err_out; @@ -786,8 +786,6 @@ atc_dma_cyclic_check_values(unsigned int reg_width, dma_addr_t buf_addr, goto err_out; if (unlikely(buf_addr & ((1 << reg_width) - 1))) goto err_out; - if (unlikely(!(direction & (DMA_DEV_TO_MEM | DMA_MEM_TO_DEV)))) - goto err_out; return 0; @@ -886,14 +884,16 @@ atc_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len, return NULL; } + if (unlikely(!is_slave_direction(direction))) + goto err_out; + if (sconfig->direction == DMA_MEM_TO_DEV) reg_width = convert_buswidth(sconfig->dst_addr_width); else reg_width = convert_buswidth(sconfig->src_addr_width); /* Check for too big/unaligned periods and unaligned DMA buffer */ - if (atc_dma_cyclic_check_values(reg_width, buf_addr, - period_len, direction)) + if (atc_dma_cyclic_check_values(reg_width, buf_addr, period_len)) goto err_out; /* build cyclic linked list */ -- GitLab