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 <jeffrey.d.skirvin@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/scsi/isci/phy.c b/drivers/scsi/isci/phy.c
index 784c9a7..93a401d 100644
--- a/drivers/scsi/isci/phy.c
+++ b/drivers/scsi/isci/phy.c
@@ -242,11 +242,8 @@
&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);