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authorDavid S. Miller <davem@davemloft.net>2010-04-10 20:26:55 -0700
committerDavid S. Miller <davem@davemloft.net>2010-04-12 23:46:18 -0700
commite182c77cc291456eed127b1472952ddb59a81a9d (patch)
tree317f39f6360f4f988ca09118fd2e3c23f5619964 /arch/sparc
parent25ad403f67d7673f38a473ec138d240804785ae3 (diff)
downloadop-kernel-dev-e182c77cc291456eed127b1472952ddb59a81a9d.zip
op-kernel-dev-e182c77cc291456eed127b1472952ddb59a81a9d.tar.gz
sparc64: Fix memory leak in pci_register_iommu_region().
Found by kmemleak. If request_resource() fails, we leak the struct resource we allocated to represent the IOMMU mapping area. This actually happens on sun4v machines because the IOMEM area is only reported sans the IOMMU region, unlike all previous systems. I'll need to fix that at some point, but for now fix the leak. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc')
-rw-r--r--arch/sparc/kernel/pci_common.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/arch/sparc/kernel/pci_common.c b/arch/sparc/kernel/pci_common.c
index b775658..8a00058 100644
--- a/arch/sparc/kernel/pci_common.c
+++ b/arch/sparc/kernel/pci_common.c
@@ -371,14 +371,19 @@ static void pci_register_iommu_region(struct pci_pbm_info *pbm)
struct resource *rp = kzalloc(sizeof(*rp), GFP_KERNEL);
if (!rp) {
- prom_printf("Cannot allocate IOMMU resource.\n");
- prom_halt();
+ pr_info("%s: Cannot allocate IOMMU resource.\n",
+ pbm->name);
+ return;
}
rp->name = "IOMMU";
rp->start = pbm->mem_space.start + (unsigned long) vdma[0];
rp->end = rp->start + (unsigned long) vdma[1] - 1UL;
rp->flags = IORESOURCE_BUSY;
- request_resource(&pbm->mem_space, rp);
+ if (request_resource(&pbm->mem_space, rp)) {
+ pr_info("%s: Unable to request IOMMU resource.\n",
+ pbm->name);
+ kfree(rp);
+ }
}
}
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