android/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

qd65xx: remove pointless qd_{read,write}_reg() (take 2)

Browse Source 
These functions are atomic so locking is pointless (noticed by Sergei).

v2:
We can now just use local_irq_save/restore() in qd_testreg() (noticed by Jeff).

Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2007-10-20 00:32:37 +02:00
parent a02bfd3ce9
commit c196567a81
1 changed files with 12 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
drivers/ide/legacy/qd65xx.c
View File

@ -89,28 +89,6 @@
static int timings[4]={-1,-1,-1,-1}; /* stores current timing for each timer */
static DEFINE_SPINLOCK(qd65xx_lock);
static void qd_write_reg (u8 content, unsigned long reg)
{
unsigned long flags;
spin_lock_irqsave(&qd65xx_lock, flags);
outb(content,reg);
spin_unlock_irqrestore(&qd65xx_lock, flags);
}
static u8 __init qd_read_reg (unsigned long reg)
{
unsigned long flags;
u8 read;
spin_lock_irqsave(&qd65xx_lock, flags);
read = inb(reg);
spin_unlock_irqrestore(&qd65xx_lock, flags);
return read;
}
/*
* qd_select:
*
@ -123,7 +101,7 @@ static void qd_select (ide_drive_t *drive)
(QD_TIMREG(drive) & 0x02);
if (timings[index] != QD_TIMING(drive))
qd_write_reg(timings[index] = QD_TIMING(drive), QD_TIMREG(drive));
outb(timings[index] = QD_TIMING(drive), QD_TIMREG(drive));
}
/*
@ -286,7 +264,7 @@ static void qd6580_set_pio_mode(ide_drive_t *drive, const u8 pio)
}
if (!HWIF(drive)->channel && drive->media != ide_disk) {
qd_write_reg(0x5f, QD_CONTROL_PORT);
outb(0x5f, QD_CONTROL_PORT);
printk(KERN_WARNING "%s: ATAPI: disabled read-ahead FIFO "
"and post-write buffer on %s.\n",
drive->name, HWIF(drive)->name);
@ -306,12 +284,12 @@ static int __init qd_testreg(int port)
unsigned long flags;
u8 savereg, readreg;
spin_lock_irqsave(&qd65xx_lock, flags);
local_irq_save(flags);
savereg = inb_p(port);
outb_p(QD_TESTVAL, port); /* safe value */
readreg = inb_p(port);
outb(savereg, port);
spin_unlock_irqrestore(&qd65xx_lock, flags);
local_irq_restore(flags);
if (savereg == QD_TESTVAL) {
printk(KERN_ERR "Outch ! the probe for qd65xx isn't reliable !\n");
@ -365,13 +343,13 @@ static void __exit qd_unsetup(ide_hwif_t *hwif)
if (set_pio_mode == (void *)qd6500_set_pio_mode) {
// will do it for both
qd_write_reg(QD6500_DEF_DATA, QD_TIMREG(&hwif->drives[0]));
outb(QD6500_DEF_DATA, QD_TIMREG(&hwif->drives[0]));
} else if (set_pio_mode == (void *)qd6580_set_pio_mode) {
if (QD_CONTROL(hwif) & QD_CONTR_SEC_DISABLED) {
qd_write_reg(QD6580_DEF_DATA, QD_TIMREG(&hwif->drives[0]));
qd_write_reg(QD6580_DEF_DATA2, QD_TIMREG(&hwif->drives[1]));
outb(QD6580_DEF_DATA, QD_TIMREG(&hwif->drives[0]));
outb(QD6580_DEF_DATA2, QD_TIMREG(&hwif->drives[1]));
} else {
qd_write_reg(hwif->channel ? QD6580_DEF_DATA2 : QD6580_DEF_DATA, QD_TIMREG(&hwif->drives[0]));
outb(hwif->channel ? QD6580_DEF_DATA2 : QD6580_DEF_DATA, QD_TIMREG(&hwif->drives[0]));
}
} else {
printk(KERN_WARNING "Unknown qd65xx tuning fonction !\n");
@ -394,7 +372,7 @@ static int __init qd_probe(int base)
u8 config;
u8 unit;
config = qd_read_reg(QD_CONFIG_PORT);
config = inb(QD_CONFIG_PORT);
if (! ((config & QD_CONFIG_BASEPORT) >> 1 == (base == 0xb0)) )
return 1;
@ -438,7 +416,7 @@ static int __init qd_probe(int base)
/* qd6580 found */
control = qd_read_reg(QD_CONTROL_PORT);
control = inb(QD_CONTROL_PORT);
printk(KERN_NOTICE "qd6580 at %#x\n", base);
printk(KERN_DEBUG "qd6580: config=%#x, control=%#x, ID3=%u\n",
@ -459,7 +437,7 @@ static int __init qd_probe(int base)
ide_device_add(idx);
qd_write_reg(QD_DEF_CONTR, QD_CONTROL_PORT);
outb(QD_DEF_CONTR, QD_CONTROL_PORT);
return 1;
} else {
@ -486,7 +464,7 @@ static int __init qd_probe(int base)
ide_device_add(idx);
qd_write_reg(QD_DEF_CONTR, QD_CONTROL_PORT);
outb(QD_DEF_CONTR, QD_CONTROL_PORT);
return 0; /* no other qd65xx possible */
}