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libata: implement and use ata_noop_irq_clear() 

->irq_clear() is used to clear IRQ bit of a SFF controller and isn't
useful for drivers which don't use libata SFF HSM implementation.
However, it's a required callback and many drivers implement their own
noop version as placeholder.  This patch implements ata_noop_irq_clear
and use it to replace those custom placeholders.

Also, SFF drivers which don't support BMDMA don't need to use
ata_bmdma_irq_clear().  It becomes noop if BMDMA address isn't
initialized.  Convert them to use ata_noop_irq_clear().

Signed-off-by: Tejun Heo <htejun@gmail.com>
wifi-calibration
Tejun Heo 2008-03-25 12:22:47 +09:00 committed by Jeff Garzik
parent c1bc899f58
commit 358f9a77a6
24 changed files with 47 additions and 90 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/ata/ahci.c
View File

@ -244,7 +244,6 @@ static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
static int ahci_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val);
static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
static void ahci_irq_clear(struct ata_port *ap);
static int ahci_port_start(struct ata_port *ap);
static void ahci_port_stop(struct ata_port *ap);
static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
@ -307,7 +306,7 @@ static const struct ata_port_operations ahci_ops = {
.qc_prep = ahci_qc_prep,
.qc_issue = ahci_qc_issue,
.irq_clear = ahci_irq_clear,
.irq_clear = ata_noop_irq_clear,
.scr_read = ahci_scr_read,
.scr_write = ahci_scr_write,
@ -343,7 +342,7 @@ static const struct ata_port_operations ahci_vt8251_ops = {
.qc_prep = ahci_qc_prep,
.qc_issue = ahci_qc_issue,
.irq_clear = ahci_irq_clear,
.irq_clear = ata_noop_irq_clear,
.scr_read = ahci_scr_read,
.scr_write = ahci_scr_write,
@ -377,7 +376,7 @@ static const struct ata_port_operations ahci_p5wdh_ops = {
.qc_prep = ahci_qc_prep,
.qc_issue = ahci_qc_issue,
.irq_clear = ahci_irq_clear,
.irq_clear = ata_noop_irq_clear,
.scr_read = ahci_scr_read,
.scr_write = ahci_scr_write,
@ -1769,11 +1768,6 @@ static void ahci_port_intr(struct ata_port *ap)
}
}
static void ahci_irq_clear(struct ata_port *ap)
{
/* TODO */
}
static irqreturn_t ahci_interrupt(int irq, void *dev_instance)
{
struct ata_host *host = dev_instance;

1
drivers/ata/libata-core.c
View File

@ -7824,6 +7824,7 @@ EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
EXPORT_SYMBOL_GPL(ata_bmdma_setup);
EXPORT_SYMBOL_GPL(ata_bmdma_start);
EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
EXPORT_SYMBOL_GPL(ata_noop_irq_clear);
EXPORT_SYMBOL_GPL(ata_bmdma_status);
EXPORT_SYMBOL_GPL(ata_bmdma_stop);
EXPORT_SYMBOL_GPL(ata_bmdma_freeze);

8
drivers/ata/libata-sff.c
View File

@ -302,6 +302,14 @@ void ata_bmdma_irq_clear(struct ata_port *ap)
iowrite8(ioread8(mmio + ATA_DMA_STATUS), mmio + ATA_DMA_STATUS);
}
/**
* ata_noop_irq_clear - Noop placeholder for irq_clear
* @ap: Port associated with this ATA transaction.
*/
void ata_noop_irq_clear(struct ata_port *ap)
{
}
/**
* ata_bmdma_status - Read PCI IDE BMDMA status
* @ap: Port associated with this ATA transaction.

2
drivers/ata/pata_ali.c
View File

@ -380,7 +380,7 @@ static struct ata_port_operations ali_early_port_ops = {
.data_xfer = ata_data_xfer,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,

7
drivers/ata/pata_at32.c
View File

@ -166,11 +166,6 @@ static void pata_at32_set_piomode(struct ata_port *ap, struct ata_device *adev)
}
}
static void pata_at32_irq_clear(struct ata_port *ap)
{
/* No DMA controller yet */
}
static struct scsi_host_template at32_sht = {
.module = THIS_MODULE,
.name = DRV_NAME,
@ -208,7 +203,7 @@ static struct ata_port_operations at32_port_ops = {
.data_xfer = ata_data_xfer,
.irq_clear = pata_at32_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,

7
drivers/ata/pata_icside.c
View File

@ -322,11 +322,6 @@ static struct scsi_host_template pata_icside_sht = {
.bios_param = ata_std_bios_param,
};
/* wish this was exported from libata-core */
static void ata_dummy_noret(struct ata_port *port)
{
}
static void pata_icside_postreset(struct ata_link *link, unsigned int *classes)
{
struct ata_port *ap = link->ap;
@ -380,7 +375,7 @@ static struct ata_port_operations pata_icside_port_ops = {
.error_handler = pata_icside_error_handler,
.post_internal_cmd = pata_icside_bmdma_stop,
.irq_clear = ata_dummy_noret,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.bmdma_stop = pata_icside_bmdma_stop,

2
drivers/ata/pata_isapnp.c
View File

@ -55,7 +55,7 @@ static struct ata_port_operations isapnp_port_ops = {
.data_xfer = ata_data_xfer,
.irq_clear = ata_bmdma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,

2
drivers/ata/pata_ixp4xx_cf.c
View File

@ -126,7 +126,7 @@ static struct ata_port_operations ixp4xx_port_ops = {
.cable_detect = ata_cable_40wire,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_port_start,

22
drivers/ata/pata_legacy.c
View File

@ -252,7 +252,7 @@ static struct ata_port_operations simple_port_ops = {
.data_xfer = ata_data_xfer_noirq,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
@ -279,7 +279,7 @@ static struct ata_port_operations legacy_port_ops = {
.data_xfer = ata_data_xfer_noirq,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
@ -393,7 +393,7 @@ static struct ata_port_operations pdc20230_port_ops = {
.data_xfer = pdc_data_xfer_vlb,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
@ -447,7 +447,7 @@ static struct ata_port_operations ht6560a_port_ops = {
.data_xfer = ata_data_xfer, /* Check vlb/noirq */
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
@ -512,7 +512,7 @@ static struct ata_port_operations ht6560b_port_ops = {
.data_xfer = ata_data_xfer, /* FIXME: Check 32bit and noirq */
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
@ -633,7 +633,7 @@ static struct ata_port_operations opti82c611a_port_ops = {
.data_xfer = ata_data_xfer,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
@ -765,7 +765,7 @@ static struct ata_port_operations opti82c46x_port_ops = {
.data_xfer = ata_data_xfer,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
@ -950,7 +950,7 @@ static struct ata_port_operations qdi6500_port_ops = {
.data_xfer = vlb32_data_xfer,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
@ -977,7 +977,7 @@ static struct ata_port_operations qdi6580_port_ops = {
.data_xfer = vlb32_data_xfer,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
@ -1004,7 +1004,7 @@ static struct ata_port_operations qdi6580dp_port_ops = {
.data_xfer = vlb32_data_xfer,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
@ -1095,7 +1095,7 @@ static struct ata_port_operations winbond_port_ops = {
.data_xfer = vlb32_data_xfer,
.irq_clear = ata_bmdma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,

2
drivers/ata/pata_mpc52xx.c
View File

@ -296,7 +296,7 @@ static struct ata_port_operations mpc52xx_ata_port_ops = {
.qc_prep = ata_qc_prep,
.qc_issue = ata_qc_issue_prot,
.data_xfer = ata_data_xfer,
.irq_clear = ata_bmdma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_port_start,
};

2
drivers/ata/pata_mpiix.c
View File

@ -187,7 +187,7 @@ static struct ata_port_operations mpiix_port_ops = {
.qc_issue = mpiix_qc_issue_prot,
.data_xfer = ata_data_xfer,
.irq_clear = ata_bmdma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,

2
drivers/ata/pata_ns87410.c
View File

@ -182,7 +182,7 @@ static struct ata_port_operations ns87410_port_ops = {
.data_xfer = ata_data_xfer,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,

4
drivers/ata/pata_pcmcia.c
View File

@ -164,7 +164,7 @@ static struct ata_port_operations pcmcia_port_ops = {
.data_xfer = ata_data_xfer_noirq,
.irq_clear = ata_bmdma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
@ -189,7 +189,7 @@ static struct ata_port_operations pcmcia_8bit_port_ops = {
.data_xfer = ata_data_xfer_8bit,
.irq_clear = ata_bmdma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,

2
drivers/ata/pata_platform.c
View File

@ -86,7 +86,7 @@ static struct ata_port_operations pata_platform_port_ops = {
.data_xfer = ata_data_xfer_noirq,
.irq_clear = ata_bmdma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_dummy_ret0,

4
drivers/ata/pata_qdi.c
View File

@ -191,7 +191,7 @@ static struct ata_port_operations qdi6500_port_ops = {
.data_xfer = qdi_data_xfer,
.irq_clear = ata_bmdma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
@ -217,7 +217,7 @@ static struct ata_port_operations qdi6580_port_ops = {
.data_xfer = qdi_data_xfer,
.irq_clear = ata_bmdma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,

6
drivers/ata/pata_rb500_cf.c
View File

@ -117,10 +117,6 @@ static irqreturn_t rb500_pata_irq_handler(int irq, void *dev_instance)
return IRQ_HANDLED;
}
static void rb500_pata_irq_clear(struct ata_port *ap)
{
}
static int rb500_pata_port_start(struct ata_port *ap)
{
return 0;
@ -144,7 +140,7 @@ static struct ata_port_operations rb500_pata_port_ops = {
.error_handler = ata_bmdma_error_handler,
.irq_handler = rb500_pata_irq_handler,
.irq_clear = rb500_pata_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = rb500_pata_port_start,

2
drivers/ata/pata_winbond.c
View File

@ -159,7 +159,7 @@ static struct ata_port_operations winbond_port_ops = {
.data_xfer = winbond_data_xfer,
.irq_clear = ata_bmdma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,

8
drivers/ata/pdc_adma.c
View File

@ -138,7 +138,6 @@ static unsigned int adma_qc_issue(struct ata_queued_cmd *qc);
static int adma_check_atapi_dma(struct ata_queued_cmd *qc);
static void adma_bmdma_stop(struct ata_queued_cmd *qc);
static u8 adma_bmdma_status(struct ata_port *ap);
static void adma_irq_clear(struct ata_port *ap);
static void adma_freeze(struct ata_port *ap);
static void adma_thaw(struct ata_port *ap);
static void adma_error_handler(struct ata_port *ap);
@ -174,7 +173,7 @@ static const struct ata_port_operations adma_ata_ops = {
.freeze = adma_freeze,
.thaw = adma_thaw,
.error_handler = adma_error_handler,
.irq_clear = adma_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.port_start = adma_port_start,
.port_stop = adma_port_stop,
@ -223,11 +222,6 @@ static u8 adma_bmdma_status(struct ata_port *ap)
return 0;
}
static void adma_irq_clear(struct ata_port *ap)
{
/* nothing */
}
static void adma_reset_engine(struct ata_port *ap)
{
void __iomem *chan = ADMA_PORT_REGS(ap);

7
drivers/ata/sata_fsl.c
View File

@ -933,11 +933,6 @@ static void sata_fsl_post_internal_cmd(struct ata_queued_cmd *qc)
}
}
static void sata_fsl_irq_clear(struct ata_port *ap)
{
/* unused */
}
static void sata_fsl_error_intr(struct ata_port *ap)
{
struct ata_link *link = &ap->link;
@ -1223,7 +1218,7 @@ static const struct ata_port_operations sata_fsl_ops = {
.qc_prep = sata_fsl_qc_prep,
.qc_issue = sata_fsl_qc_issue,
.irq_clear = sata_fsl_irq_clear,
.irq_clear = ata_noop_irq_clear,
.scr_read = sata_fsl_scr_read,
.scr_write = sata_fsl_scr_write,

7
drivers/ata/sata_inic162x.c
View File

@ -266,11 +266,6 @@ static u8 inic_bmdma_status(struct ata_port *ap)
return ATA_DMA_INTR;
}
static void inic_irq_clear(struct ata_port *ap)
{
/* noop */
}
static void inic_host_intr(struct ata_port *ap)
{
void __iomem *port_base = inic_port_base(ap);
@ -555,7 +550,7 @@ static struct ata_port_operations inic_port_ops = {
.bmdma_stop = inic_bmdma_stop,
.bmdma_status = inic_bmdma_status,
.irq_clear = inic_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.qc_prep = ata_qc_prep,

11
drivers/ata/sata_mv.c
View File

@ -461,7 +461,6 @@ struct mv_hw_ops {
void (*reset_bus)(struct ata_host *host, void __iomem *mmio);
};
static void mv_irq_clear(struct ata_port *ap);
static int mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val);
static int mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val);
static int mv5_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val);
@ -564,7 +563,7 @@ static const struct ata_port_operations mv5_ops = {
.qc_issue = mv_qc_issue,
.data_xfer = ata_data_xfer,
.irq_clear = mv_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.error_handler = mv_error_handler,
@ -592,7 +591,7 @@ static const struct ata_port_operations mv6_ops = {
.qc_issue = mv_qc_issue,
.data_xfer = ata_data_xfer,
.irq_clear = mv_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.error_handler = mv_error_handler,
@ -620,7 +619,7 @@ static const struct ata_port_operations mv_iie_ops = {
.qc_issue = mv_qc_issue,
.data_xfer = ata_data_xfer,
.irq_clear = mv_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.error_handler = mv_error_handler,
@ -801,10 +800,6 @@ static inline int mv_get_hc_count(unsigned long port_flags)
return ((port_flags & MV_FLAG_DUAL_HC) ? 2 : 1);
}
static void mv_irq_clear(struct ata_port *ap)
{
}
static void mv_set_edma_ptrs(void __iomem *port_mmio,
struct mv_host_priv *hpriv,
struct mv_port_priv *pp)

8
drivers/ata/sata_qstor.c
View File

@ -121,7 +121,6 @@ static unsigned int qs_qc_issue(struct ata_queued_cmd *qc);
static int qs_check_atapi_dma(struct ata_queued_cmd *qc);
static void qs_bmdma_stop(struct ata_queued_cmd *qc);
static u8 qs_bmdma_status(struct ata_port *ap);
static void qs_irq_clear(struct ata_port *ap);
static void qs_freeze(struct ata_port *ap);
static void qs_thaw(struct ata_port *ap);
static void qs_error_handler(struct ata_port *ap);
@ -157,7 +156,7 @@ static const struct ata_port_operations qs_ata_ops = {
.freeze = qs_freeze,
.thaw = qs_thaw,
.error_handler = qs_error_handler,
.irq_clear = qs_irq_clear,
.irq_clear = ata_noop_irq_clear,
.irq_on = ata_irq_on,
.scr_read = qs_scr_read,
.scr_write = qs_scr_write,
@ -211,11 +210,6 @@ static u8 qs_bmdma_status(struct ata_port *ap)
return 0;
}
static void qs_irq_clear(struct ata_port *ap)
{
/* nothing */
}
static inline void qs_enter_reg_mode(struct ata_port *ap)
{
u8 __iomem *chan = qs_mmio_base(ap->host) + (ap->port_no * 0x4000);

8
drivers/ata/sata_sil24.c
View File

@ -348,7 +348,6 @@ static void sil24_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
static int sil24_qc_defer(struct ata_queued_cmd *qc);
static void sil24_qc_prep(struct ata_queued_cmd *qc);
static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc);
static void sil24_irq_clear(struct ata_port *ap);
static void sil24_pmp_attach(struct ata_port *ap);
static void sil24_pmp_detach(struct ata_port *ap);
static void sil24_freeze(struct ata_port *ap);
@ -416,7 +415,7 @@ static const struct ata_port_operations sil24_ops = {
.qc_prep = sil24_qc_prep,
.qc_issue = sil24_qc_issue,
.irq_clear = sil24_irq_clear,
.irq_clear = ata_noop_irq_clear,
.scr_read = sil24_scr_read,
.scr_write = sil24_scr_write,
@ -921,11 +920,6 @@ static unsigned int sil24_qc_issue(struct ata_queued_cmd *qc)
return 0;
}
static void sil24_irq_clear(struct ata_port *ap)
{
/* unused */
}
static void sil24_pmp_attach(struct ata_port *ap)
{
sil24_config_pmp(ap, 1);

1
include/linux/libata.h
View File

@ -896,6 +896,7 @@ extern void ata_bmdma_start(struct ata_queued_cmd *qc);
extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
extern u8 ata_bmdma_status(struct ata_port *ap);
extern void ata_bmdma_irq_clear(struct ata_port *ap);
extern void ata_noop_irq_clear(struct ata_port *ap);
extern void ata_bmdma_freeze(struct ata_port *ap);
extern void ata_bmdma_thaw(struct ata_port *ap);
extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,