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author | Sergey Shtylyov <s.shtylyov@omp.ru> | 2022-02-13 16:10:31 +0100 |
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committer | Damien Le Moal <damien.lemoal@opensource.wdc.com> | 2022-02-19 03:18:49 +0100 |
commit | 4fc5f0aa9712418dcb12c446a904a359e5568659 (patch) | |
tree | 7b88a031f50deff70ecae71de1a0e25ddc686e19 /drivers/ata/libata-sff.c | |
parent | ata: libata-sff: make ata_resources_present() return 'bool' (diff) | |
download | linux-4fc5f0aa9712418dcb12c446a904a359e5568659.tar.xz linux-4fc5f0aa9712418dcb12c446a904a359e5568659.zip |
ata: libata-sff: refactor ata_sff_set_devctl()
Commit 41dec29bcb05 ("libata: introduce sff_set_devctl() method") left some
clumsy checks surrounding calls to ata_sff_set_devctl() which Jeff Garzik
suggested to factor out... and I never followed up. :-(
At last, refactor ata_sff_set_devctl() to include the repetitive checks and
return a 'bool' result indicating if the device control register exists or
not.
While at it, further update the 'kernel-doc' comment -- the device control
register has never been a part of the taskfile, despite what Jeff and co.
think! :-)
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Diffstat (limited to 'drivers/ata/libata-sff.c')
-rw-r--r-- | drivers/ata/libata-sff.c | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c index f5e4cd046055..aefe8af5cdac 100644 --- a/drivers/ata/libata-sff.c +++ b/drivers/ata/libata-sff.c @@ -265,20 +265,26 @@ EXPORT_SYMBOL_GPL(ata_sff_wait_ready); * @ap: port where the device is * @ctl: value to write * - * Writes ATA taskfile device control register. + * Writes ATA device control register. * - * Note: may NOT be used as the sff_set_devctl() entry in - * ata_port_operations. + * RETURN: + * true if the register exists, false if not. * * LOCKING: * Inherited from caller. */ -static void ata_sff_set_devctl(struct ata_port *ap, u8 ctl) +static bool ata_sff_set_devctl(struct ata_port *ap, u8 ctl) { - if (ap->ops->sff_set_devctl) + if (ap->ops->sff_set_devctl) { ap->ops->sff_set_devctl(ap, ctl); - else + return true; + } + if (ap->ioaddr.ctl_addr) { iowrite8(ctl, ap->ioaddr.ctl_addr); + return true; + } + + return false; } /** @@ -357,8 +363,6 @@ static void ata_dev_select(struct ata_port *ap, unsigned int device, */ void ata_sff_irq_on(struct ata_port *ap) { - struct ata_ioports *ioaddr = &ap->ioaddr; - if (ap->ops->sff_irq_on) { ap->ops->sff_irq_on(ap); return; @@ -367,8 +371,7 @@ void ata_sff_irq_on(struct ata_port *ap) ap->ctl &= ~ATA_NIEN; ap->last_ctl = ap->ctl; - if (ap->ops->sff_set_devctl || ioaddr->ctl_addr) - ata_sff_set_devctl(ap, ap->ctl); + ata_sff_set_devctl(ap, ap->ctl); ata_wait_idle(ap); if (ap->ops->sff_irq_clear) @@ -1662,8 +1665,7 @@ void ata_sff_freeze(struct ata_port *ap) ap->ctl |= ATA_NIEN; ap->last_ctl = ap->ctl; - if (ap->ops->sff_set_devctl || ap->ioaddr.ctl_addr) - ata_sff_set_devctl(ap, ap->ctl); + ata_sff_set_devctl(ap, ap->ctl); /* Under certain circumstances, some controllers raise IRQ on * ATA_NIEN manipulation. Also, many controllers fail to mask @@ -2061,10 +2063,8 @@ void ata_sff_postreset(struct ata_link *link, unsigned int *classes) return; /* set up device control */ - if (ap->ops->sff_set_devctl || ap->ioaddr.ctl_addr) { - ata_sff_set_devctl(ap, ap->ctl); + if (ata_sff_set_devctl(ap, ap->ctl)) ap->last_ctl = ap->ctl; - } } EXPORT_SYMBOL_GPL(ata_sff_postreset); |