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qd65xx: fix deadlock on error handling

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Stop abusing ide_lock lock (switch to a private locking).

Fixes same issue as fixed by Alan Cox in atiixp host driver with
commit 6c5f8cc33e.

Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2007-10-20 00:32:35 +02:00
parent a34a8751f3
commit f949820de3
1 changed files with 9 additions and 8 deletions
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17
drivers/ide/legacy/qd65xx.c
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@ -89,13 +89,15 @@
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(&ide_lock, flags);
spin_lock_irqsave(&qd65xx_lock, flags);
outb(content,reg);
spin_unlock_irqrestore(&ide_lock, flags);
spin_unlock_irqrestore(&qd65xx_lock, flags);
}
static u8 __init qd_read_reg (unsigned long reg)
@ -103,9 +105,9 @@ static u8 __init qd_read_reg (unsigned long reg)
unsigned long flags;
u8 read;
spin_lock_irqsave(&ide_lock, flags);
spin_lock_irqsave(&qd65xx_lock, flags);
read = inb(reg);
spin_unlock_irqrestore(&ide_lock, flags);
spin_unlock_irqrestore(&qd65xx_lock, flags);
return read;
}
@ -301,16 +303,15 @@ static void qd6580_set_pio_mode(ide_drive_t *drive, const u8 pio)
static int __init qd_testreg(int port)
{
u8 savereg;
u8 readreg;
unsigned long flags;
u8 savereg, readreg;
spin_lock_irqsave(&ide_lock, flags);
spin_lock_irqsave(&qd65xx_lock, flags);
savereg = inb_p(port);
outb_p(QD_TESTVAL, port); /* safe value */
readreg = inb_p(port);
outb(savereg, port);
spin_unlock_irqrestore(&ide_lock, flags);
spin_unlock_irqrestore(&qd65xx_lock, flags);
if (savereg == QD_TESTVAL) {
printk(KERN_ERR "Outch ! the probe for qd65xx isn't reliable !\n");