From 9b917987fd16d0687afe550a02f68099419f5d43 Mon Sep 17 00:00:00 2001 From: Jeff Skirvin Date: Mon, 20 Jun 2011 14:09:31 -0700 Subject: [PATCH] isci: Disable link layer hang detection Some targets exceed the hang detect timer. Use the OS timeout to catch hung tasks. Signed-off-by: Jeff Skirvin Signed-off-by: Dan Williams --- drivers/scsi/isci/phy.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/drivers/scsi/isci/phy.c b/drivers/scsi/isci/phy.c index 784c9a71333..93a401dfbd3 100644 --- a/drivers/scsi/isci/phy.c +++ b/drivers/scsi/isci/phy.c @@ -242,11 +242,8 @@ scic_sds_phy_link_layer_initialization(struct scic_sds_phy *sci_phy, &sci_phy->link_layer_registers->maximum_arbitration_wait_timer_timeout); } - /* - * Set the link layer hang detection to 500ms (0x1F4) from its default - * value of 128ms. Max value is 511 ms. - */ - writel(0x1F4, &sci_phy->link_layer_registers->link_layer_hang_detection_timeout); + /* Disable link layer hang detection, rely on the OS timeout for I/O timeouts. */ + writel(0, &sci_phy->link_layer_registers->link_layer_hang_detection_timeout); /* We can exit the initial state to the stopped state */ sci_change_state(&sci_phy->sm, SCI_PHY_STOPPED); -- 2.20.1