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

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;