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dm: clean up assert in virtio_rnd.c

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clean up assert in virtio_rnd.c

Tracked-On: #3252
Signed-off-by: Gao Junhao <junhao.gao@intel.com>
Reviewed-by: Yonghua Huang <yonghua.huang@intel.com>
This commit is contained in:
Gao Junhao 2019-07-04 07:38:09 +00:00 committed by ACRN System Integration
parent 842da0ac1e
commit e837116691
1 changed files with 25 additions and 17 deletions
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42
devicemodel/hw/pci/virtio/virtio_rnd.c
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@ -34,8 +34,8 @@
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <assert.h>
#include <pthread.h>
#include <errno.h>
#include "dm.h"
#include "pci_core.h"
@ -193,7 +193,6 @@ virtio_rnd_k_set_status(void *base, uint64_t status)
static int
virtio_rnd_kernel_init(struct virtio_rnd *rnd)
{
assert(rnd->vbs_k.fd == 0);
rnd->vbs_k.fd = open("/dev/vbs_rng", O_RDWR);
if (rnd->vbs_k.fd < 0) {
@ -305,7 +304,6 @@ virtio_rnd_get_entropy(void *param)
struct virtio_vq_info *vq = &rnd->vq;
struct iovec iov;
uint16_t idx;
int ret;
ssize_t len;
for (;;) {
@ -317,20 +315,24 @@ virtio_rnd_get_entropy(void *param)
* - avoid vring processing due to spurious wakeups
* - catch missing notifications before acquiring rx_mtx
*/
while (!vq_has_descs(vq)) {
ret = pthread_cond_wait(&rnd->rx_cond, &rnd->rx_mtx);
assert(ret == 0);
}
while (!vq_has_descs(vq))
pthread_cond_wait(&rnd->rx_cond, &rnd->rx_mtx);
rnd->in_progress = 1;
pthread_mutex_unlock(&rnd->rx_mtx);
do {
ret = vq_getchain(vq, &idx, &iov, 1, NULL);
assert(ret > 0);
vq_getchain(vq, &idx, &iov, 1, NULL);
len = read(rnd->fd, iov.iov_base, iov.iov_len);
assert(len > 0);
if (len <= 0) {
vq_retchain(vq);
vq_endchains(vq, 0);
/* no data available */
if (len == -1 && errno == EAGAIN)
return NULL;
break;
}
/* release this chain and handle more */
vq_relchain(vq, idx, len);
@ -384,7 +386,10 @@ virtio_rnd_init(struct vmctx *ctx, struct pci_vdev *dev, char *opts)
* Should always be able to open /dev/random.
*/
fd = open("/dev/random", O_RDONLY);
assert(fd >= 0);
if (fd < 0) {
WPRINTF(("virtio_rnd: open failed: /dev/random \n"));
return -1;
}
rnd = calloc(1, sizeof(struct virtio_rnd));
if (!rnd) {
@ -495,13 +500,16 @@ virtio_rnd_deinit(struct vmctx *ctx, struct pci_vdev *dev, char *opts)
virtio_rnd_kernel_stop(rnd);
virtio_rnd_kernel_reset(rnd);
rnd->vbs_k.status = VIRTIO_DEV_INITIAL;
assert(rnd->vbs_k.fd >= 0);
close(rnd->vbs_k.fd);
rnd->vbs_k.fd = -1;
if (rnd->vbs_k.fd >= 0) {
close(rnd->vbs_k.fd);
rnd->vbs_k.fd = -1;
}
}
assert(rnd->fd >= 0);
close(rnd->fd);
if (rnd->fd >= 0) {
close(rnd->fd);
rnd->fd = -1;
}
DPRINTF(("%s: free struct virtio_rnd!\n", __func__));
free(rnd);
}