| Message ID | 20220127090806.8201-1-tangmeng@uniontech.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v2] scsi: sr: Improve the judgment statement | expand |
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c index f925b1f1f9ad..610baa630067 100644 --- a/drivers/scsi/sr.c +++ b/drivers/scsi/sr.c @@ -222,12 +222,16 @@ static unsigned int sr_get_events(struct scsi_device *sdev) if (eh->nea || eh->notification_class != 0x4) return 0; - if (med->media_event_code == 1) + switch (med->media_event_code) { + case 1: return DISK_EVENT_EJECT_REQUEST; - else if (med->media_event_code == 2) - return DISK_EVENT_MEDIA_CHANGE; - else if (med->media_event_code == 3) + case 2: + case 3: return DISK_EVENT_MEDIA_CHANGE; + default: + break; + } + return 0; }
The previous code has a less-than-perfect usage of judgment syntax. When the med->media_event_code value is equal to 2 or 3, the same value is returned, so it would be better to combine the implementation statements when the med->media_event_code value is equal to 2 or 3. Moreover, when a variable is equal to multiple values, it is better to use a switch judgment statement. Signed-off-by: tangmeng <tangmeng@uniontech.com> --- drivers/scsi/sr.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-)