mirror of https://gitee.com/openkylin/linux.git
libata: remove unused functions
This patch removes the following obsolete functions: - libata-core.c: __sata_phy_reset() - libata-core.c: sata_phy_reset() - libata-eh.c: ata_qc_timeout() - libata-eh.c: ata_eng_timeout() Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Tejun Heo <htejun@gmail.com>
This commit is contained in:
Adrian Bunk
Tejun Heo
parent
de753e5e86
commit
21bef6dd2b
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@ -2580,81 +2580,6 @@ void sata_print_link_status(struct ata_link *link)
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}
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}
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/**
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* __sata_phy_reset - Wake/reset a low-level SATA PHY
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* @ap: SATA port associated with target SATA PHY.
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*
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* This function issues commands to standard SATA Sxxx
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* PHY registers, to wake up the phy (and device), and
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* clear any reset condition.
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*
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* LOCKING:
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* PCI/etc. bus probe sem.
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*
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*/
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void __sata_phy_reset(struct ata_port *ap)
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{
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struct ata_link *link = &ap->link;
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unsigned long timeout = jiffies + (HZ * 5);
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u32 sstatus;
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if (ap->flags & ATA_FLAG_SATA_RESET) {
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/* issue phy wake/reset */
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sata_scr_write_flush(link, SCR_CONTROL, 0x301);
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/* Couldn't find anything in SATA I/II specs, but
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* AHCI-1.1 10.4.2 says at least 1 ms. */
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mdelay(1);
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}
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/* phy wake/clear reset */
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sata_scr_write_flush(link, SCR_CONTROL, 0x300);
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/* wait for phy to become ready, if necessary */
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do {
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msleep(200);
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sata_scr_read(link, SCR_STATUS, &sstatus);
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if ((sstatus & 0xf) != 1)
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break;
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} while (time_before(jiffies, timeout));
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/* print link status */
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sata_print_link_status(link);
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/* TODO: phy layer with polling, timeouts, etc. */
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if (!ata_link_offline(link))
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ata_port_probe(ap);
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else
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ata_port_disable(ap);
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if (ap->flags & ATA_FLAG_DISABLED)
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return;
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if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
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ata_port_disable(ap);
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return;
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}
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ap->cbl = ATA_CBL_SATA;
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}
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/**
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* sata_phy_reset - Reset SATA bus.
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* @ap: SATA port associated with target SATA PHY.
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*
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* This function resets the SATA bus, and then probes
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* the bus for devices.
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*
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* LOCKING:
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* PCI/etc. bus probe sem.
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*
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*/
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void sata_phy_reset(struct ata_port *ap)
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{
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__sata_phy_reset(ap);
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if (ap->flags & ATA_FLAG_DISABLED)
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return;
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ata_bus_reset(ap);
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}
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/**
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* ata_dev_pair - return other device on cable
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* @adev: device
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@ -7653,8 +7578,6 @@ EXPORT_SYMBOL_GPL(ata_dev_disable);
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EXPORT_SYMBOL_GPL(sata_set_spd);
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EXPORT_SYMBOL_GPL(sata_link_debounce);
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EXPORT_SYMBOL_GPL(sata_link_resume);
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EXPORT_SYMBOL_GPL(sata_phy_reset);
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EXPORT_SYMBOL_GPL(__sata_phy_reset);
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EXPORT_SYMBOL_GPL(ata_bus_reset);
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EXPORT_SYMBOL_GPL(ata_std_prereset);
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EXPORT_SYMBOL_GPL(ata_std_softreset);
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@ -7725,7 +7648,6 @@ EXPORT_SYMBOL_GPL(ata_port_desc);
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#ifdef CONFIG_PCI
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EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
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#endif /* CONFIG_PCI */
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EXPORT_SYMBOL_GPL(ata_eng_timeout);
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EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
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EXPORT_SYMBOL_GPL(ata_link_abort);
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EXPORT_SYMBOL_GPL(ata_port_abort);
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@ -559,101 +559,6 @@ void ata_port_wait_eh(struct ata_port *ap)
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}
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}
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/**
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* ata_qc_timeout - Handle timeout of queued command
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* @qc: Command that timed out
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*
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* Some part of the kernel (currently, only the SCSI layer)
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* has noticed that the active command on port @ap has not
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* completed after a specified length of time. Handle this
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* condition by disabling DMA (if necessary) and completing
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* transactions, with error if necessary.
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*
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* This also handles the case of the "lost interrupt", where
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* for some reason (possibly hardware bug, possibly driver bug)
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* an interrupt was not delivered to the driver, even though the
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* transaction completed successfully.
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*
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* TODO: kill this function once old EH is gone.
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*
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* LOCKING:
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* Inherited from SCSI layer (none, can sleep)
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*/
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static void ata_qc_timeout(struct ata_queued_cmd *qc)
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{
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struct ata_port *ap = qc->ap;
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u8 host_stat = 0, drv_stat;
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unsigned long flags;
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DPRINTK("ENTER\n");
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ap->hsm_task_state = HSM_ST_IDLE;
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spin_lock_irqsave(ap->lock, flags);
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switch (qc->tf.protocol) {
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case ATA_PROT_DMA:
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case ATA_PROT_ATAPI_DMA:
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host_stat = ap->ops->bmdma_status(ap);
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/* before we do anything else, clear DMA-Start bit */
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ap->ops->bmdma_stop(qc);
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/* fall through */
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default:
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ata_altstatus(ap);
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drv_stat = ata_chk_status(ap);
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/* ack bmdma irq events */
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ap->ops->irq_clear(ap);
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ata_dev_printk(qc->dev, KERN_ERR, "command 0x%x timeout, "
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"stat 0x%x host_stat 0x%x\n",
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qc->tf.command, drv_stat, host_stat);
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/* complete taskfile transaction */
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qc->err_mask |= AC_ERR_TIMEOUT;
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break;
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}
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spin_unlock_irqrestore(ap->lock, flags);
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ata_eh_qc_complete(qc);
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DPRINTK("EXIT\n");
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}
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/**
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* ata_eng_timeout - Handle timeout of queued command
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* @ap: Port on which timed-out command is active
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*
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* Some part of the kernel (currently, only the SCSI layer)
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* has noticed that the active command on port @ap has not
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* completed after a specified length of time. Handle this
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* condition by disabling DMA (if necessary) and completing
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* transactions, with error if necessary.
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*
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* This also handles the case of the "lost interrupt", where
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* for some reason (possibly hardware bug, possibly driver bug)
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* an interrupt was not delivered to the driver, even though the
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* transaction completed successfully.
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*
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* TODO: kill this function once old EH is gone.
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*
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* LOCKING:
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* Inherited from SCSI layer (none, can sleep)
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*/
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void ata_eng_timeout(struct ata_port *ap)
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{
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DPRINTK("ENTER\n");
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ata_qc_timeout(ata_qc_from_tag(ap, ap->link.active_tag));
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DPRINTK("EXIT\n");
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}
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static int ata_eh_nr_in_flight(struct ata_port *ap)
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{
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unsigned int tag;
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@ -771,8 +771,6 @@ static inline int ata_port_is_dummy(struct ata_port *ap)
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extern void sata_print_link_status(struct ata_link *link);
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extern void ata_port_probe(struct ata_port *);
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extern void __sata_phy_reset(struct ata_port *ap);
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extern void sata_phy_reset(struct ata_port *ap);
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extern void ata_bus_reset(struct ata_port *ap);
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extern int sata_set_spd(struct ata_link *link);
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extern int sata_link_debounce(struct ata_link *link,
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@ -994,8 +992,6 @@ extern void sata_pmp_do_eh(struct ata_port *ap,
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/*
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* EH
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*/
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extern void ata_eng_timeout(struct ata_port *ap);
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extern void ata_port_schedule_eh(struct ata_port *ap);
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extern int ata_link_abort(struct ata_link *link);
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extern int ata_port_abort(struct ata_port *ap);
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