Messages in this thread Patch in this message |  | | Date | Thu, 20 Oct 2016 10:07:36 -0400 | From | Tejun Heo <> | Subject | Re: [PATCH] ata: set ncq_prio_enabled if device has support |
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Hello, Adam.
Applied to libata/for-4.10 with minor edits.
Thanks!
------ 8< ------ From 4e647d960c510e0d5cd700058fb8ddd529c390ee Mon Sep 17 00:00:00 2001 From: Adam Manzanares <adam.manzanares@hgst.com> Date: Wed, 19 Oct 2016 20:40:19 -0700 Subject: [PATCH] ata: set ncq_prio_enabled iff device has support
We previously had a check to see if the device has support for prioritized ncq commands and a check to see if a device flag is set, through a sysfs variable, in order to send a prioritized command.
This patch only allows the sysfs variable to be set if the device supports prioritized commands enabling one check in ata_build_rw_tf in order to determine whether or not to send a prioritized command.
This patch depends on ata: ATA Command Priority Disabled By Default
tj: Minor subject and formatting updates.
Signed-off-by: Adam Manzanares <adam.manzanares@wdc.com> Signed-off-by: Tejun Heo <tj@kernel.org> --- drivers/ata/libata-core.c | 3 +-- drivers/ata/libata-scsi.c | 10 ++++++++-- 2 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index b294339..43842fd 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -787,8 +787,7 @@ int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev, if (tf->flags & ATA_TFLAG_FUA) tf->device |= 1 << 7; - if ((dev->flags & ATA_DFLAG_NCQ_PRIO) && - (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE)) { + if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE) { if (class == IOPRIO_CLASS_RT) tf->hob_nsect |= ATA_PRIO_HIGH << ATA_SHIFT_PRIO; diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 87597a3..49c09d8 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -323,10 +323,16 @@ static ssize_t ata_ncq_prio_enable_store(struct device *device, goto unlock; } - if (input) + if (input) { + if (!(dev->flags & ATA_DFLAG_NCQ_PRIO)) { + rc = -EOPNOTSUPP; + goto unlock; + } + dev->flags |= ATA_DFLAG_NCQ_PRIO_ENABLE; - else + } else { dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE; + } unlock: spin_unlock_irqrestore(ap->lock, flags); -- 2.7.4
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