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[libata] sata_vsc: fix inconsistent NULL checking 

Also, cleanup interrupt mask content and note in Kconfig that this
driver supports the Intel 31244.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Dan Williams 2006-03-21 22:07:13 -05:00 committed by Jeff Garzik
parent 4d4681f6b9
commit c962990a38
2 changed files with 32 additions and 23 deletions
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4
drivers/scsi/Kconfig
View File

@ -595,10 +595,10 @@ config SCSI_SATA_VIA
If unsure, say N.
config SCSI_SATA_VITESSE
tristate "VITESSE VSC-7174 SATA support"
tristate "VITESSE VSC-7174 / INTEL 31244 SATA support"
depends on SCSI_SATA && PCI
help
This option enables support for Vitesse VSC7174 Serial ATA.
This option enables support for Vitesse VSC7174 and Intel 31244 Serial ATA.
If unsure, say N.

51
drivers/scsi/sata_vsc.c
View File

@ -82,17 +82,20 @@
#define VSC_SATA_PORT_OFFSET 0x200
/* Error interrupt status bit offsets */
#define VSC_SATA_INT_ERROR_E_OFFSET 2
#define VSC_SATA_INT_ERROR_P_OFFSET 4
#define VSC_SATA_INT_ERROR_T_OFFSET 5
#define VSC_SATA_INT_ERROR_M_OFFSET 1
#define VSC_SATA_INT_ERROR_CRC 0x40
#define VSC_SATA_INT_ERROR_T 0x20
#define VSC_SATA_INT_ERROR_P 0x10
#define VSC_SATA_INT_ERROR_R 0x8
#define VSC_SATA_INT_ERROR_E 0x4
#define VSC_SATA_INT_ERROR_M 0x2
#define VSC_SATA_INT_PHY_CHANGE 0x1
#define VSC_SATA_INT_ERROR (VSC_SATA_INT_ERROR_CRC | VSC_SATA_INT_ERROR_T | \
VSC_SATA_INT_ERROR_P | VSC_SATA_INT_ERROR_R | \
VSC_SATA_INT_ERROR_E | VSC_SATA_INT_ERROR_M | \
VSC_SATA_INT_PHY_CHANGE)
#define is_vsc_sata_int_err(port_idx, int_status) \
(int_status & ((1 << (VSC_SATA_INT_ERROR_E_OFFSET + (8 * port_idx))) | \
(1 << (VSC_SATA_INT_ERROR_P_OFFSET + (8 * port_idx))) | \
(1 << (VSC_SATA_INT_ERROR_T_OFFSET + (8 * port_idx))) | \
(1 << (VSC_SATA_INT_ERROR_M_OFFSET + (8 * port_idx))) \
)\
)
(int_status & (VSC_SATA_INT_ERROR << (8 * port_idx)))
static u32 vsc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg)
@ -215,14 +218,6 @@ static irqreturn_t vsc_sata_interrupt (int irq, void *dev_instance,
ap = host_set->ports[i];
if (is_vsc_sata_int_err(i, int_status)) {
u32 err_status;
printk(KERN_DEBUG "%s: ignoring interrupt(s)\n", __FUNCTION__);
err_status = ap ? vsc_sata_scr_read(ap, SCR_ERROR) : 0;
vsc_sata_scr_write(ap, SCR_ERROR, err_status);
handled++;
}
if (ap && !(ap->flags &
(ATA_FLAG_PORT_DISABLED|ATA_FLAG_NOINTR))) {
struct ata_queued_cmd *qc;
@ -230,12 +225,26 @@ static irqreturn_t vsc_sata_interrupt (int irq, void *dev_instance,
qc = ata_qc_from_tag(ap, ap->active_tag);
if (qc && (!(qc->tf.ctl & ATA_NIEN))) {
handled += ata_host_intr(ap, qc);
} else {
printk(KERN_DEBUG "%s: ignoring interrupt(s)\n", __FUNCTION__);
} else if (is_vsc_sata_int_err(i, int_status)) {
/*
* On some chips (i.e. Intel 31244), an error
* interrupt will sneak in at initialization
* time (phy state changes). Clearing the SCR
* error register is not required, but it prevents
* the phy state change interrupts from recurring
* later.
*/
u32 err_status;
err_status = vsc_sata_scr_read(ap, SCR_ERROR);
printk(KERN_DEBUG "%s: clearing interrupt, "
"status %x; sata err status %x\n",
__FUNCTION__,
int_status, err_status);
vsc_sata_scr_write(ap, SCR_ERROR, err_status);
/* Clear interrupt status */
ata_chk_status(ap);
handled++;
}
}
}
}