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[SCSI] gdth: don't call pci_free_consistent under spinlock 

The spinlock is held over too large a region: pscratch is a permanent
address (it's allocated at boot time and never changes).  All you need
the smp lock for is mediating the scratch in use flag, so fix this by
moving the spinlock into the case where we set the pscratch_busy flag
to false.

Cc: Stable Tree <stable@kernel.org>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
James Bottomley 2008-02-17 11:24:51 -06:00
parent 279e7f5425
commit ff83efacf2
1 changed files with 2 additions and 4 deletions
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6
drivers/scsi/gdth_proc.c
View File

@ -694,15 +694,13 @@ static void gdth_ioctl_free(gdth_ha_str *ha, int size, char *buf, ulong64 paddr)
{
ulong flags;
spin_lock_irqsave(&ha->smp_lock, flags);
if (buf == ha->pscratch) {
spin_lock_irqsave(&ha->smp_lock, flags);
ha->scratch_busy = FALSE;
spin_unlock_irqrestore(&ha->smp_lock, flags);
} else {
pci_free_consistent(ha->pdev, size, buf, paddr);
}
spin_unlock_irqrestore(&ha->smp_lock, flags);
}
#ifdef GDTH_IOCTL_PROC