Commit 9b917987 authored by Jeff Skirvin's avatar Jeff Skirvin Committed by Dan Williams
Browse files

isci: Disable link layer hang detection 



Some targets exceed the hang detect timer.  Use the OS timeout to
catch hung tasks.

Signed-off-by: default avatarJeff Skirvin <jeffrey.d.skirvin@intel.com>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent fd0527ab

drivers/scsi/isci/phy.c

+2 −5
Original line number Diff line number Diff line
@@ -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);