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authorSuresh Siddha <suresh.b.siddha@intel.com>2008-09-25 18:43:34 -0700
committerIngo Molnar <mingo@elte.hu>2008-09-26 09:42:20 +0200
commit379daf6290814e41f14880094b7b773640df2461 (patch)
treee9b016fd4b8dcb0e4fbe39af75db84f313b6fd75 /include
parent9a22b6e76ba75fa0f3963cdec7829156d00a7173 (diff)
downloadop-kernel-dev-379daf6290814e41f14880094b7b773640df2461.zip
op-kernel-dev-379daf6290814e41f14880094b7b773640df2461.tar.gz
IO resources, x86: ioremap sanity check to catch mapping requests exceeding the BAR sizes
Go through the iomem resource tree to check if any of the ioremap() requests span more than any slot in the iomem resource tree and do a WARN_ON() if we hit this check. This will raise a red-flag, if some driver is mapping more than what is needed. And hopefully identify possible corruptions much earlier. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
-rw-r--r--include/linux/ioport.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index fded376..01712cf 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -169,6 +169,7 @@ extern struct resource * __devm_request_region(struct device *dev,
extern void __devm_release_region(struct device *dev, struct resource *parent,
resource_size_t start, resource_size_t n);
+extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size);
#endif /* __ASSEMBLY__ */
#endif /* _LINUX_IOPORT_H */
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