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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>
This commit is contained in:
Jeff Skirvin 2011-06-20 14:09:31 -07:00 committed by Dan Williams
parent fd0527ab15
commit 9b917987fd
1 changed files with 2 additions and 5 deletions
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7
drivers/scsi/isci/phy.c
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@ -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);