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Subject[PATCH] misc: fastrpc: fix improper packet size calculation
Date
The buffer list is sorted and this is not being
considered while calculating packet size. This
would lead to improper copy length calculation
for non-dmaheap buffers which would eventually
cause sending improper buffers to DSP.

Signed-off-by: Jeya R <jeyr@codeaurora.org>
---
drivers/misc/fastrpc.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
index beda610..a7e550f 100644
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -719,16 +719,21 @@ static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx)
static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen)
{
u64 size = 0;
- int i;
+ int oix = 0;

size = ALIGN(metalen, FASTRPC_ALIGN);
- for (i = 0; i < ctx->nscalars; i++) {
+ for (oix = 0; oix < ctx->nbufs; oix++) {
+ int i = ctx->olaps[oix].raix;
+
+ if (ctx->args[i].length == 0)
+ continue;
+
if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) {

- if (ctx->olaps[i].offset == 0)
+ if (ctx->olaps[oix].offset == 0)
size = ALIGN(size, FASTRPC_ALIGN);

- size += (ctx->olaps[i].mend - ctx->olaps[i].mstart);
+ size += (ctx->olaps[oix].mend - ctx->olaps[oix].mstart);
}
}

--
2.7.4
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