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Diffstat (limited to 'drivers/iommu/fsl_pamu.c')
-rw-r--r--drivers/iommu/fsl_pamu.c27
1 files changed, 15 insertions, 12 deletions
diff --git a/drivers/iommu/fsl_pamu.c b/drivers/iommu/fsl_pamu.c
index a34355fca37a..8540625796a1 100644
--- a/drivers/iommu/fsl_pamu.c
+++ b/drivers/iommu/fsl_pamu.c
@@ -42,6 +42,8 @@ struct pamu_isr_data {
static struct paace *ppaact;
static struct paace *spaact;
+static bool probed; /* Has PAMU been probed? */
+
/*
* Table for matching compatible strings, for device tree
* guts node, for QorIQ SOCs.
@@ -530,8 +532,8 @@ u32 get_stash_id(u32 stash_dest_hint, u32 vcpu)
if (node) {
prop = of_get_property(node, "cache-stash-id", NULL);
if (!prop) {
- pr_debug("missing cache-stash-id at %s\n",
- node->full_name);
+ pr_debug("missing cache-stash-id at %pOF\n",
+ node);
of_node_put(node);
return ~(u32)0;
}
@@ -557,8 +559,8 @@ found_cpu_node:
if (stash_dest_hint == cache_level) {
prop = of_get_property(node, "cache-stash-id", NULL);
if (!prop) {
- pr_debug("missing cache-stash-id at %s\n",
- node->full_name);
+ pr_debug("missing cache-stash-id at %pOF\n",
+ node);
of_node_put(node);
return ~(u32)0;
}
@@ -568,8 +570,7 @@ found_cpu_node:
prop = of_get_property(node, "next-level-cache", NULL);
if (!prop) {
- pr_debug("can't find next-level-cache at %s\n",
- node->full_name);
+ pr_debug("can't find next-level-cache at %pOF\n", node);
of_node_put(node);
return ~(u32)0; /* can't traverse any further */
}
@@ -1033,6 +1034,9 @@ static int fsl_pamu_probe(struct platform_device *pdev)
* NOTE : All PAMUs share the same LIODN tables.
*/
+ if (WARN_ON(probed))
+ return -EBUSY;
+
pamu_regs = of_iomap(dev->of_node, 0);
if (!pamu_regs) {
dev_err(dev, "ioremap of PAMU node failed\n");
@@ -1063,8 +1067,7 @@ static int fsl_pamu_probe(struct platform_device *pdev)
guts_node = of_find_matching_node(NULL, guts_device_ids);
if (!guts_node) {
- dev_err(dev, "could not find GUTS node %s\n",
- dev->of_node->full_name);
+ dev_err(dev, "could not find GUTS node %pOF\n", dev->of_node);
ret = -ENODEV;
goto error;
}
@@ -1172,6 +1175,8 @@ static int fsl_pamu_probe(struct platform_device *pdev)
setup_liodns();
+ probed = true;
+
return 0;
error_genpool:
@@ -1246,8 +1251,7 @@ static __init int fsl_pamu_init(void)
pdev = platform_device_alloc("fsl-of-pamu", 0);
if (!pdev) {
- pr_err("could not allocate device %s\n",
- np->full_name);
+ pr_err("could not allocate device %pOF\n", np);
ret = -ENOMEM;
goto error_device_alloc;
}
@@ -1259,8 +1263,7 @@ static __init int fsl_pamu_init(void)
ret = platform_device_add(pdev);
if (ret) {
- pr_err("could not add device %s (err=%i)\n",
- np->full_name, ret);
+ pr_err("could not add device %pOF (err=%i)\n", np, ret);
goto error_device_add;
}