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drivers/misc: fix rpmsg dev poll assert crash

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when client read and poll wait buffer from server side and server side may
poll notify more than one times, then rpmsgdev in client side will call
"rpmsgdev_poll_setup(priv, 0, false);" twice which will cause crash in
vela rpmsgdev_server.c

Signed-off-by: rongyichang <rongyichang@xiaomi.com>
This commit is contained in:
rongyichang
2024-11-05 17:26:37 +08:00
committed by Xiang Xiao
parent 0bad7f814a
commit d73815e3e9
1 changed files with 6 additions and 5 deletions
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drivers/misc/rpmsgdev_server.c
+6 -5
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@@ -403,12 +403,13 @@ static int rpmsgdev_poll_handler(FAR struct rpmsg_endpoint *ept,
}
else
{
DEBUGASSERT(dev->cfd != 0);
msg->header.result = file_poll(&dev->file, &dev->fd, false);
if (msg->header.result == OK)
if (dev->cfd != 0)
{
dev->cfd = 0;
msg->header.result = file_poll(&dev->file, &dev->fd, false);
if (msg->header.result == OK)
{
dev->cfd = 0;
}
}
}