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rng-egd: offset the point when repeatedly read from the buffer

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The buffer content might be read out more than once, currently
we just repeatedly read the first data block, buffer offset is
missing.

Cc: qemu-stable@nongnu.org
Signed-off-by: Amos Kong <akong@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Amos Kong 2013-11-21 16:42:51 +08:00 committed by Paolo Bonzini
parent 60aad298cb
commit fbdcec5c48
1 changed files with 3 additions and 1 deletions
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4
backends/rng-egd.c
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@ -91,12 +91,14 @@ static int rng_egd_chr_can_read(void *opaque)
static void rng_egd_chr_read(void *opaque, const uint8_t *buf, int size)
{
RngEgd *s = RNG_EGD(opaque);
size_t buf_offset = 0;
while (size > 0 && s->requests) {
RngRequest *req = s->requests->data;
int len = MIN(size, req->size - req->offset);
memcpy(req->data + req->offset, buf, len);
memcpy(req->data + req->offset, buf + buf_offset, len);
buf_offset += len;
req->offset += len;
size -= len;