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[POWERPC] Split out the logic that allocates struct iommus 

Split out the logic that allocates a struct iommu into a separate
function.  This can fail however the calling code has never cared - so
just return if we can't allocate an iommu.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Michael Ellerman 2008-01-30 01:13:59 +11:00 committed by Paul Mackerras
parent 41d824bf61
commit 209bfbb478
1 changed files with 16 additions and 4 deletions
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20
arch/powerpc/platforms/cell/iommu.c
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@ -565,10 +565,9 @@ static int __init cell_iommu_get_window(struct device_node *np,
return 0;
}
static void __init cell_iommu_init_one(struct device_node *np, unsigned long offset)
static struct cbe_iommu * __init cell_iommu_alloc(struct device_node *np)
{
struct cbe_iommu *iommu;
unsigned long base, size;
int nid, i;
/* Get node ID */
@ -576,7 +575,7 @@ static void __init cell_iommu_init_one(struct device_node *np, unsigned long off
if (nid < 0) {
printk(KERN_ERR "iommu: failed to get node for %s\n",
np->full_name);
return;
return NULL;
}
pr_debug("iommu: setting up iommu for node %d (%s)\n",
nid, np->full_name);
@ -592,7 +591,7 @@ static void __init cell_iommu_init_one(struct device_node *np, unsigned long off
if (cbe_nr_iommus >= NR_IOMMUS) {
printk(KERN_ERR "iommu: too many IOMMUs detected ! (%s)\n",
np->full_name);
return;
return NULL;
}
/* Init base fields */
@ -603,6 +602,19 @@ static void __init cell_iommu_init_one(struct device_node *np, unsigned long off
snprintf(iommu->name, sizeof(iommu->name), "iommu%d", i);
INIT_LIST_HEAD(&iommu->windows);
return iommu;
}
static void __init cell_iommu_init_one(struct device_node *np,
unsigned long offset)
{
struct cbe_iommu *iommu;
unsigned long base, size;
iommu = cell_iommu_alloc(np);
if (!iommu)
return;
/* Obtain a window for it */
cell_iommu_get_window(np, &base, &size);