From 6f48844e3f16b7d8a1f9a1a11bd9a11089a5292f Mon Sep 17 00:00:00 2001 From: Jeff Skirvin Date: Thu, 8 Mar 2012 22:41:48 -0800 Subject: isci: Manage the link layer hang detect timer for RNC suspensions. For STP devices under certain protocol conditions, an RNC will not suspend until the current transfer state is broken with a SYNC/ESC sequence from the SCU. The SYNC/ESC driven by expiration of the SCU link layer hang detect timer, which has too small a dynamic range to support slow SATA devices, so normally it is disabled. This change enables the timer with the minimum period at the point when the suspension is requested. Note that there is potential collateral damage to other open connections to slow SATA devices on the same port, since there is no alternative but to enable the LLHANG timer on every phy in the port for the current suspension request - there is no way to tell on which phy the RNC in question is currently active. Signed-off-by: Jeff Skirvin Signed-off-by: Dan Williams --- drivers/scsi/isci/remote_device.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'drivers/scsi/isci/remote_device.h') diff --git a/drivers/scsi/isci/remote_device.h b/drivers/scsi/isci/remote_device.h index 4a67ff0eb94e..4850b58edbe6 100644 --- a/drivers/scsi/isci/remote_device.h +++ b/drivers/scsi/isci/remote_device.h @@ -301,6 +301,13 @@ static inline void sci_remote_device_decrement_request_count(struct isci_remote_ idev->started_request_count--; } +static inline void isci_dev_set_hang_detection_timeout( + struct isci_remote_device *idev, + u32 timeout) +{ + sci_port_set_hang_detection_timeout(idev->owning_port, timeout); +} + enum sci_status sci_remote_device_frame_handler( struct isci_remote_device *idev, u32 frame_index); -- cgit v1.2.3