firewire: ohci: replace vm_map_ram() with vmap()
vm_map_ram() is intended for short-lived objects, so using it for the AR buffers could fragment address space, especially on a 32-bit machine. For an allocation that lives as long as the device, vmap() is the better choice. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
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1 changed files with 2 additions and 4 deletions
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@ -689,8 +689,7 @@ static void ar_context_release(struct ar_context *ctx)
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{
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unsigned int i;
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if (ctx->buffer)
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vm_unmap_ram(ctx->buffer, AR_BUFFERS + AR_WRAPAROUND_PAGES);
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vunmap(ctx->buffer);
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for (i = 0; i < AR_BUFFERS; i++)
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if (ctx->pages[i]) {
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@ -1018,8 +1017,7 @@ static int ar_context_init(struct ar_context *ctx, struct fw_ohci *ohci,
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pages[i] = ctx->pages[i];
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for (i = 0; i < AR_WRAPAROUND_PAGES; i++)
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pages[AR_BUFFERS + i] = ctx->pages[i];
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ctx->buffer = vm_map_ram(pages, AR_BUFFERS + AR_WRAPAROUND_PAGES,
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-1, PAGE_KERNEL);
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ctx->buffer = vmap(pages, ARRAY_SIZE(pages), VM_MAP, PAGE_KERNEL);
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if (!ctx->buffer)
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goto out_of_memory;
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