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drm/vmwgfx: Add a check to handle host message failure

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Discovered by static code analysis tool.  If for some reason communication
with the host fails more than preset number of retries, return an error
instead of return garbage.

Signed-off-by: Sinclair Yeh <syeh@vmware.com>
Reviewed-by: Charmaine Lee <charmainel@vmware.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
This commit is contained in:
Sinclair Yeh 2016-06-29 16:31:01 -07:00
parent 81e257e964
commit a9cd9c044a
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/vmwgfx/vmwgfx_msg.c
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@ -300,6 +300,9 @@ static int vmw_recv_msg(struct rpc_channel *channel, void **msg,
break;
}
if (retries == RETRIES)
return -EINVAL;
*msg_len = reply_len;
*msg = reply;