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@@ -31,17 +31,19 @@ static int addr_aligned(struct bounce_buffer *state)
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return 1;
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}
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-int bounce_buffer_start(struct bounce_buffer *state, void *data,
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- size_t len, unsigned int flags)
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+int bounce_buffer_start_extalign(struct bounce_buffer *state, void *data,
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+ size_t len, unsigned int flags,
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+ size_t alignment,
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+ int (*addr_is_aligned)(struct bounce_buffer *state))
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{
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state->user_buffer = data;
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state->bounce_buffer = data;
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state->len = len;
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- state->len_aligned = roundup(len, ARCH_DMA_MINALIGN);
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+ state->len_aligned = roundup(len, alignment);
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state->flags = flags;
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- if (!addr_aligned(state)) {
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- state->bounce_buffer = memalign(ARCH_DMA_MINALIGN,
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+ if (!addr_is_aligned(state)) {
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+ state->bounce_buffer = memalign(alignment,
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state->len_aligned);
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if (!state->bounce_buffer)
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return -ENOMEM;
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@@ -62,6 +64,14 @@ int bounce_buffer_start(struct bounce_buffer *state, void *data,
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return 0;
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}
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+int bounce_buffer_start(struct bounce_buffer *state, void *data,
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+ size_t len, unsigned int flags)
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+{
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+ return bounce_buffer_start_extalign(state, data, len, flags,
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+ ARCH_DMA_MINALIGN,
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+ addr_aligned);
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+}
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+
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int bounce_buffer_stop(struct bounce_buffer *state)
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{
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if (state->flags & GEN_BB_WRITE) {
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