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isci: fix COMSAS negation timout workaround for WD SAS drives 

The following patch is a fix for the WD workaround
COMSAS negation timeout change. This patch disables the
OOB SM when the OOB is placed in reset, which allows
the updated COMSAS negation timeout value to take
effect.

Cc: Dan Thompson <daniel.j.thompson@intel.com>
Reported-by: Dan Thompson <daniel.j.thompson@intel.com>
Signed-off-by: Dave Maurer <david.c.maurer@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dave Maurer 2012-06-22 06:45:33 +00:00 committed by Dan Williams
parent 6d70a74ffd
commit a900375605
1 changed files with 2 additions and 0 deletions
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2
drivers/scsi/isci/phy.c
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@ -1205,6 +1205,7 @@ static void scu_link_layer_start_oob(struct isci_phy *iphy)
/** Reset OOB sequence - start */
val = readl(&ll->phy_configuration);
val &= ~(SCU_SAS_PCFG_GEN_BIT(OOB_RESET) |
SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE) |
SCU_SAS_PCFG_GEN_BIT(HARD_RESET));
writel(val, &ll->phy_configuration);
readl(&ll->phy_configuration); /* flush */
@ -1236,6 +1237,7 @@ static void scu_link_layer_tx_hard_reset(
* to the starting state. */
phy_configuration_value =
readl(&iphy->link_layer_registers->phy_configuration);
phy_configuration_value &= ~(SCU_SAS_PCFG_GEN_BIT(OOB_ENABLE));
phy_configuration_value |=
(SCU_SAS_PCFG_GEN_BIT(HARD_RESET) |
SCU_SAS_PCFG_GEN_BIT(OOB_RESET));