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do not loop on an incomplete io_thread_fd read

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No need to loop if less than a full buffer is read, the next
read would return EAGAIN.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Paolo Bonzini 2010-02-02 20:33:09 +01:00 committed by Anthony Liguori
parent 889ae39c9a
commit 1d0f0d91f2
1 changed files with 2 additions and 2 deletions
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4
vl.c
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@ -3229,12 +3229,12 @@ static void qemu_event_read(void *opaque)
{
int fd = (unsigned long)opaque;
ssize_t len;
char buffer[512];
/* Drain the notify pipe */
do {
char buffer[512];
len = read(fd, buffer, sizeof(buffer));
} while ((len == -1 && errno == EINTR) || len > 0);
} while ((len == -1 && errno == EINTR) || len == sizeof(buffer));
}
static int qemu_event_init(void)