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| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2016-01-29 14:13:30 (GMT) |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-02-23 07:56:16 (GMT) |
| commit | 9a99649f2a89fdfc9dde5d5401675561567bf99a (patch) | |
| tree | b15f95ac2c6a81c3dd85b4ab815406c164979d5f /arch/s390/pci/pci.c | |
| parent | 1b17cb796f5d40ffa239c6926385abd83a77a49b (diff) | |
| download | linux-9a99649f2a89fdfc9dde5d5401675561567bf99a.tar.xz | |
s390/pci: remove pdev pointer from arch data
For each PCI function we need to maintain arch specific data in
struct zpci_dev which also contains a pointer to struct pci_dev.
When a function is registered or deregistered (which is triggered by PCI
common code) we need to adjust that pointer which could interfere with
the machine check handler (triggered by FW) using zpci_dev->pdev.
Since multiple instances of the same pdev could exist at a time this can't
be solved with locking.
Fix that by ditching the pdev pointer and use a bus walk to reach
struct pci_dev (only one instance of a pdev can be registered at the bus
at a time).
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/pci/pci.c')
| -rw-r--r-- | arch/s390/pci/pci.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c index 8f19c8f..f76d01e 100644 --- a/arch/s390/pci/pci.c +++ b/arch/s390/pci/pci.c @@ -637,11 +637,9 @@ static void zpci_cleanup_bus_resources(struct zpci_dev *zdev) int pcibios_add_device(struct pci_dev *pdev) { - struct zpci_dev *zdev = to_zpci(pdev); struct resource *res; int i; - zdev->pdev = pdev; pdev->dev.groups = zpci_attr_groups; zpci_map_resources(pdev); @@ -664,8 +662,7 @@ int pcibios_enable_device(struct pci_dev *pdev, int mask) { struct zpci_dev *zdev = to_zpci(pdev); - zdev->pdev = pdev; - zpci_debug_init_device(zdev); + zpci_debug_init_device(zdev, dev_name(&pdev->dev)); zpci_fmb_enable_device(zdev); return pci_enable_resources(pdev, mask); @@ -677,7 +674,6 @@ void pcibios_disable_device(struct pci_dev *pdev) zpci_fmb_disable_device(zdev); zpci_debug_exit_device(zdev); - zdev->pdev = NULL; } #ifdef CONFIG_HIBERNATE_CALLBACKS |