Messages in this thread Patch in this message | | | From | Lin Ming <> | Subject | [PATCH v4 10/13] [SCSI] pm: resume device if suspend failed | Date | Mon, 28 May 2012 13:08:37 +0800 |
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From: Aaron Lu <aaron.lu@amd.com>
V2: use scsi_device instead of device in scsi_device_resume
V1: For scsi devices which use scsi bus runtime callback, runtime suspend will call scsi_dev_type_suspend, and if the drv->suspend failed, the device will still be in active state. But since scsi_device_quiesce is called, the device will not be able to respond any more commands. So add a check here to see if err occured, if so, bring the device back to normal state with scsi_device_resume.
Signed-off-by: Aaron Lu <aaron.lu@amd.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> --- drivers/scsi/scsi_pm.c | 5 ++++- 1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/drivers/scsi/scsi_pm.c b/drivers/scsi/scsi_pm.c index c467064..a06dd56 100644 --- a/drivers/scsi/scsi_pm.c +++ b/drivers/scsi/scsi_pm.c @@ -24,8 +24,11 @@ static int scsi_dev_type_suspend(struct device *dev, pm_message_t msg) err = scsi_device_quiesce(to_scsi_device(dev)); if (err == 0) { drv = dev->driver; - if (drv && drv->suspend) + if (drv && drv->suspend) { err = drv->suspend(dev, msg); + if (err) + scsi_device_resume(to_scsi_device(dev)); + } } dev_dbg(dev, "scsi suspend: %d\n", err); return err; -- 1.7.2.5
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