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authorLinus Torvalds <torvalds@linux-foundation.org>2016-02-25 18:54:53 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-02-25 18:54:53 -0800
commit3d7b365490d5f2f8ac1aaaf6cce775e6a8b7f570 (patch)
tree416a123b9eb6ae0dc9ad6df3bbbfc0c130edf195 /kernel/memremap.c
parent1ebe3839e66ae85e065157ba9d6f7923ad8d8fbf (diff)
parentc45442055dfdeb265cc20c9eeaa9fd11a75fbf51 (diff)
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Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm fixes from Dan Williams: - Two fixes for compatibility with the ACPI 6.1 specification. Without these fixes multi-interface DIMMs will fail to be probed, and address range scrub commands to find memory errors will give results that the kernel will mis-interpret. For multi-interface DIMMs Linux will accept either the original 6.0 implementation or 6.1. For address range scrub we'll only support 6.1 since ACPI formalized this DSM differently than the original example [1] implemented in v4.2. The expectation is that production systems will only ever ship the ACPI 6.1 address range scrub command definition. - The wider async address range scrub work targeting 4.6 discovered that the original synchronous implementation in 4.5 is not sizing its return buffer correctly. - Arnd caught that my recent fix to the size of the pfn_t flags missed updating the flags variable used in the pmem driver. - Toshi found that we mishandle the memremap() return value in devm_memremap(). * 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: nvdimm: use 'u64' for pfn flags devm_memremap: Fix error value when memremap failed nfit: update address range scrub commands to the acpi 6.1 format libnvdimm, tools/testing/nvdimm: fix 'ars_status' output buffer sizing nfit: fix multi-interface dimm handling, acpi6.1 compatibility
Diffstat (limited to 'kernel/memremap.c')
-rw-r--r--kernel/memremap.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/memremap.c b/kernel/memremap.c
index 7a1b5c3..b981a7b 100644
--- a/kernel/memremap.c
+++ b/kernel/memremap.c
@@ -136,8 +136,10 @@ void *devm_memremap(struct device *dev, resource_size_t offset,
if (addr) {
*ptr = addr;
devres_add(dev, ptr);
- } else
+ } else {
devres_free(ptr);
+ return ERR_PTR(-ENXIO);
+ }
return addr;
}
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