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| author | Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com> | 2012-12-28 09:13:19 +0000 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-03-06 03:22:36 +0000 |
| commit | 066f289835f09a3f744d6bac96f25e25d20b3ded (patch) | |
| tree | 988d0150393c65c585680e54f436fd628b4c6bbd /arch/powerpc/include | |
| parent | 10928eb067be9d946771fe1adcb22bbaad43830c (diff) | |
| download | kernel_samsung_smdk4412-066f289835f09a3f744d6bac96f25e25d20b3ded.zip kernel_samsung_smdk4412-066f289835f09a3f744d6bac96f25e25d20b3ded.tar.gz kernel_samsung_smdk4412-066f289835f09a3f744d6bac96f25e25d20b3ded.tar.bz2 | |
powerpc/eeh: Fix crash when adding a device in a slot with DDW
commit 6a040ce72598159a74969a2d01ab0ba5ee6536b3 upstream.
The DDW code uses a eeh_dev struct from the pci_dev. However, this is
not set until eeh_add_device_late is called.
Since pci_bus_add_devices is called before eeh_add_device_late, the PCI
devices are added to the bus, making drivers' probe hooks to be called.
These will call set_dma_mask, which will call the DDW code, which will
require the eeh_dev struct from pci_dev. This would result in a crash,
due to a NULL dereference.
Calling eeh_add_device_late after pci_bus_add_devices would make the
system BUG, because device files shouldn't be added to devices there
were not added to the system. So, a new function is needed to add such
files only after pci_bus_add_devices have been called.
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
Acked-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/eeh.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h index 66ea9b8..21165a4 100644 --- a/arch/powerpc/include/asm/eeh.h +++ b/arch/powerpc/include/asm/eeh.h @@ -61,6 +61,7 @@ void __init pci_addr_cache_build(void); */ void eeh_add_device_tree_early(struct device_node *); void eeh_add_device_tree_late(struct pci_bus *); +void eeh_add_sysfs_files(struct pci_bus *); /** * eeh_remove_device_recursive - undo EEH for device & children. @@ -105,6 +106,8 @@ static inline void eeh_add_device_tree_early(struct device_node *dn) { } static inline void eeh_add_device_tree_late(struct pci_bus *bus) { } +static inline void eeh_add_sysfs_files(struct pci_bus *bus) { } + static inline void eeh_remove_bus_device(struct pci_dev *dev) { } #define EEH_POSSIBLE_ERROR(val, type) (0) #define EEH_IO_ERROR_VALUE(size) (-1UL) |