[kernel] fix device_open oflag comparison error. (#7512)

Guozhanxin · web-flow · commit 12a4bb154a21 · 2023-05-16T18:46:42.000+08:00
diff --git a/src/device.c b/src/device.c
@@ -235,7 +235,7 @@ rt_err_t rt_device_open(rt_device_t dev, rt_uint16_t oflag)
 
     /* device is not opened or opened by other oflag, call device_open interface */
     if (!(dev->open_flag & RT_DEVICE_OFLAG_OPEN) ||
-         ((dev->open_flag & RT_DEVICE_OFLAG_MASK) | (oflag & RT_DEVICE_OFLAG_MASK)))
+         ((dev->open_flag & RT_DEVICE_OFLAG_MASK) != (oflag & RT_DEVICE_OFLAG_MASK)))
     {
         if (device_open != RT_NULL)
         {

Original file line number	Diff line number	Diff line change
`@@ -235,7 +235,7 @@ rt_err_t rt_device_open(rt_device_t dev, rt_uint16_t oflag)`
`235`	`235`
`236`	`236`	`/* device is not opened or opened by other oflag, call device_open interface */`
`237`	`237`	`if (!(dev->open_flag & RT_DEVICE_OFLAG_OPEN) \|\|`
`238`		`- ((dev->open_flag & RT_DEVICE_OFLAG_MASK) \| (oflag & RT_DEVICE_OFLAG_MASK)))`
	`238`	`+ ((dev->open_flag & RT_DEVICE_OFLAG_MASK) != (oflag & RT_DEVICE_OFLAG_MASK)))`
`239`	`239`	`{`
`240`	`240`	`if (device_open != RT_NULL)`
`241`	`241`	`{`