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List:       linux-usb
Subject:    [PATCH 4/6] uas: improve abort handler
From:       Gerd Hoffmann <kraxel () redhat ! com>
Date:       2012-11-30 10:54:43
Message-ID: 1354272885-7276-5-git-send-email-kraxel () redhat ! com
[Download RAW message or body]

Two changes.  First we check whenever the request is linked in the work
list and if so take it out.  Second check whenever the command is
actually in flight before asking the device to cancel it via task
management, and in case it isn't just zap the data urbs and finish it.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/usb/storage/uas.c |   19 +++++++++++++++++--
 1 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c
index 05f1f2b..5416f2a 100644
--- a/drivers/usb/storage/uas.c
+++ b/drivers/usb/storage/uas.c
@@ -715,8 +715,23 @@ static int uas_eh_abort_handler(struct scsi_cmnd *cmnd)
 	uas_log_cmd_state(cmnd, __func__);
 	spin_lock_irqsave(&devinfo->lock, flags);
 	cmdinfo->state |= COMMAND_ABORTED;
-	spin_unlock_irqrestore(&devinfo->lock, flags);
-	ret = uas_eh_task_mgmt(cmnd, "ABORT TASK", TMF_ABORT_TASK);
+	if (cmdinfo->state & IS_IN_WORK_LIST) {
+		spin_lock(&uas_work_lock);
+		list_del(&cmdinfo->list);
+		cmdinfo->state &= ~IS_IN_WORK_LIST;
+		spin_unlock(&uas_work_lock);
+	}
+	if (cmdinfo->state & COMMAND_INFLIGHT) {
+		spin_unlock_irqrestore(&devinfo->lock, flags);
+		ret = uas_eh_task_mgmt(cmnd, "ABORT TASK", TMF_ABORT_TASK);
+	} else {
+		spin_unlock_irqrestore(&devinfo->lock, flags);
+		uas_unlink_data_urbs(devinfo, cmdinfo);
+		spin_lock_irqsave(&devinfo->lock, flags);
+		uas_try_complete(cmnd, __func__);
+		spin_unlock_irqrestore(&devinfo->lock, flags);
+		ret = SUCCESS;
+	}
 	return ret;
 }
 
-- 
1.7.1

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