diff options
| author | Gabriele Mazzotta <gabriele.mzt@gmail.com> | 2015-04-25 19:52:36 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-06-06 08:19:36 -0700 |
| commit | d7ad68665c207a92d32a366a01481ebe3a6b2d57 (patch) | |
| tree | bf11b940bc783c4affc90c8533a812fff73678e5 | |
| parent | cdf0b10c2e341792e3a7ec622a767d62aadf38c9 (diff) | |
libata: Add helper to determine when PHY events should be ignored
commit 8393b811f38acdf7fd8da2028708edad3e68ce1f upstream.
This is a preparation commit that will allow to add other criteria
according to which PHY events should be dropped.
Signed-off-by: Gabriele Mazzotta <gabriele.mzt@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/ata/libahci.c | 3 | ||||
| -rw-r--r-- | drivers/ata/libata-core.c | 19 | ||||
| -rw-r--r-- | include/linux/libata.h | 1 |
3 files changed, 21 insertions, 2 deletions
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c index 36605abe5a67..b65d79cd43d5 100644 --- a/drivers/ata/libahci.c +++ b/drivers/ata/libahci.c @@ -1693,8 +1693,7 @@ static void ahci_handle_port_interrupt(struct ata_port *ap, if (unlikely(resetting)) status &= ~PORT_IRQ_BAD_PMP; - /* if LPM is enabled, PHYRDY doesn't mean anything */ - if (ap->link.lpm_policy > ATA_LPM_MAX_POWER) { + if (sata_lpm_ignore_phy_events(&ap->link)) { status &= ~PORT_IRQ_PHYRDY; ahci_scr_write(&ap->link, SCR_ERROR, SERR_PHYRDY_CHG); } diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 538574f98e22..7f72ca0f0fc8 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -6825,6 +6825,25 @@ u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val, return tmp; } +/** + * sata_lpm_ignore_phy_events - test if PHY event should be ignored + * @link: Link receiving the event + * + * Test whether the received PHY event has to be ignored or not. + * + * LOCKING: + * None: + * + * RETURNS: + * True if the event has to be ignored. + */ +bool sata_lpm_ignore_phy_events(struct ata_link *link) +{ + /* if LPM is enabled, PHYRDY doesn't mean anything */ + return !!(link->lpm_policy > ATA_LPM_MAX_POWER); +} +EXPORT_SYMBOL_GPL(sata_lpm_ignore_phy_events); + /* * Dummy port_ops */ diff --git a/include/linux/libata.h b/include/linux/libata.h index e13b3aef0b0c..cf205c03d758 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -1201,6 +1201,7 @@ extern struct ata_device *ata_dev_pair(struct ata_device *adev); extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap); extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q); +extern bool sata_lpm_ignore_phy_events(struct ata_link *link); extern int ata_cable_40wire(struct ata_port *ap); extern int ata_cable_80wire(struct ata_port *ap); |