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s390/pci: return error after failed pci ops
Access to pci config space via pci_ops should not fail silently. Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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2c3700bbb2
1 changed files with 12 additions and 4 deletions
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@ -405,20 +405,28 @@ static int pci_read(struct pci_bus *bus, unsigned int devfn, int where,
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int size, u32 *val)
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{
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struct zpci_dev *zdev = get_zdev_by_bus(bus);
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int ret;
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if (!zdev || devfn != ZPCI_DEVFN)
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return 0;
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return zpci_cfg_load(zdev, where, val, size);
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ret = -ENODEV;
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else
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ret = zpci_cfg_load(zdev, where, val, size);
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return ret;
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}
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static int pci_write(struct pci_bus *bus, unsigned int devfn, int where,
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int size, u32 val)
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{
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struct zpci_dev *zdev = get_zdev_by_bus(bus);
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int ret;
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if (!zdev || devfn != ZPCI_DEVFN)
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return 0;
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return zpci_cfg_store(zdev, where, val, size);
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ret = -ENODEV;
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else
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ret = zpci_cfg_store(zdev, where, val, size);
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return ret;
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}
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static struct pci_ops pci_root_ops = {
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