From 4e2247b2bd289f079349d6c69755f8cff4e31f2b Mon Sep 17 00:00:00 2001
From: Lan Tianyu <tianyu.lan@intel.com>
Date: Thu, 15 Mar 2012 11:11:31 +0800
Subject: [PATCH] [SCSI] sd: Add runtime pm in the sd_check_events()

The sd_check_event() will be called periodly even when the device is in the
suspended status to check media event. The scsi_test_unit_ready() in the
sd_check_event() will issue scsi cmd request. Issuing scsi request when the
device is in the suspeneded status will cause problem. For example, when a usb
flash disk in the suspended status, scsi_test_unit_ready() issues a scsi
request. The request will be returned as failed because the usb device is not
active. The patch adds scsi_autopm_get_device() and scsi_autopm_put_device()
around scsi_test_unit_ready() in the sd_check_event() to resolve such problem.

Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
---
Reading git-format-patch failed