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@@ -235,7 +235,7 @@ rt_err_t rt_device_open(rt_device_t dev, rt_uint16_t oflag)
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/* device is not opened or opened by other oflag, call device_open interface */
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/* device is not opened or opened by other oflag, call device_open interface */
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if (!(dev->open_flag & RT_DEVICE_OFLAG_OPEN) ||
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if (!(dev->open_flag & RT_DEVICE_OFLAG_OPEN) ||
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- ((dev->open_flag & RT_DEVICE_OFLAG_MASK) | (oflag & RT_DEVICE_OFLAG_MASK)))
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+ ((dev->open_flag & RT_DEVICE_OFLAG_MASK) != (oflag & RT_DEVICE_OFLAG_MASK)))
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{
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{
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if (device_open != RT_NULL)
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if (device_open != RT_NULL)
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{
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{
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guo