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firewire: Byteswap iso header so all headers are presented as be32.

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Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Kristian Høgsberg
2007-04-10 18:11:16 -04:00
committed by Stefan Richter
parent 8a2f7d932f
commit 15536221d1
1 changed files with 7 additions and 1 deletions
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8
drivers/firewire/fw-ohci.c
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@@ -1257,7 +1257,13 @@ static int handle_ir_dualbuffer_packet(struct context *context,
p = db + 1; p = db + 1;
end = p + header_length; end = p + header_length;
while (p < end && i + ctx->base.header_size <= PAGE_SIZE) { while (p < end && i + ctx->base.header_size <= PAGE_SIZE) {
memcpy(ctx->header + i, p + 4, ctx->base.header_size); /* The iso header is byteswapped to little endian by
* the controller, but the remaining header quadlets
* are big endian. We want to present all the headers
* as big endian, so we have to swap the first
* quadlet. */
*(u32 *) (ctx->header + i) = __swab32(*(u32 *) (p + 4));
memcpy(ctx->header + i + 4, p + 8, ctx->base.header_size - 4);
i += ctx->base.header_size; i += ctx->base.header_size;
p += ctx->base.header_size + 4; p += ctx->base.header_size + 4;
} }