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cxl: Clean up adapter MMIO unmap path.
- MMIO pointer unmapping is guarded by a null pointer check. However, iounmap doesn't null the pointer, just invalidate it. Therefore, explicitly null the pointer after unmapping. - afu_desc_mmio also needs to be unmapped. - PCI regions are allocated in cxl_map_adapter_regs. Therefore they should be released in unmap, not elsewhere. Acked-by: Cyril Bur <cyrilbur@gmail.com> Signed-off-by: Daniel Axtens <dja@axtens.net> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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@ -539,10 +539,18 @@ static int cxl_map_slice_regs(struct cxl_afu *afu, struct cxl *adapter, struct p
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static void cxl_unmap_slice_regs(struct cxl_afu *afu)
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{
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if (afu->p2n_mmio)
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if (afu->p2n_mmio) {
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iounmap(afu->p2n_mmio);
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if (afu->p1n_mmio)
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afu->p2n_mmio = NULL;
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}
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if (afu->p1n_mmio) {
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iounmap(afu->p1n_mmio);
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afu->p1n_mmio = NULL;
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}
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if (afu->afu_desc_mmio) {
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iounmap(afu->afu_desc_mmio);
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afu->afu_desc_mmio = NULL;
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}
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}
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static void cxl_release_afu(struct device *dev)
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@ -920,10 +928,16 @@ static int cxl_map_adapter_regs(struct cxl *adapter, struct pci_dev *dev)
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static void cxl_unmap_adapter_regs(struct cxl *adapter)
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{
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if (adapter->p1_mmio)
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if (adapter->p1_mmio) {
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iounmap(adapter->p1_mmio);
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if (adapter->p2_mmio)
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adapter->p1_mmio = NULL;
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pci_release_region(to_pci_dev(adapter->dev.parent), 2);
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}
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if (adapter->p2_mmio) {
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iounmap(adapter->p2_mmio);
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adapter->p2_mmio = NULL;
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pci_release_region(to_pci_dev(adapter->dev.parent), 0);
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}
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}
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static int cxl_read_vsec(struct cxl *adapter, struct pci_dev *dev)
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@ -1132,8 +1146,6 @@ static void cxl_remove_adapter(struct cxl *adapter)
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device_unregister(&adapter->dev);
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pci_release_region(pdev, 0);
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pci_release_region(pdev, 2);
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pci_disable_device(pdev);
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}
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