diff options
| author | Daniel Axtens <dja@axtens.net> | 2015-08-14 09:41:21 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-08-14 13:32:05 +0200 |
| commit | 575e6986f028711287fbbf250e5289a089bac8cb (patch) | |
| tree | d26bc62a6792840f9953881f28c9e7ecff0c5f20 /drivers/misc | |
| parent | cxl: Make IRQ release idempotent (diff) | |
| download | linux-575e6986f028711287fbbf250e5289a089bac8cb.tar.xz linux-575e6986f028711287fbbf250e5289a089bac8cb.zip | |
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>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/cxl/pci.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c index dc26cdd653ad..1dae1db3166d 100644 --- a/drivers/misc/cxl/pci.c +++ b/drivers/misc/cxl/pci.c @@ -539,10 +539,18 @@ err: static void cxl_unmap_slice_regs(struct cxl_afu *afu) { - if (afu->p2n_mmio) + if (afu->p2n_mmio) { iounmap(afu->p2n_mmio); - if (afu->p1n_mmio) + afu->p2n_mmio = NULL; + } + if (afu->p1n_mmio) { iounmap(afu->p1n_mmio); + afu->p1n_mmio = NULL; + } + if (afu->afu_desc_mmio) { + iounmap(afu->afu_desc_mmio); + afu->afu_desc_mmio = NULL; + } } static void cxl_release_afu(struct device *dev) @@ -920,10 +928,16 @@ err1: static void cxl_unmap_adapter_regs(struct cxl *adapter) { - if (adapter->p1_mmio) + if (adapter->p1_mmio) { iounmap(adapter->p1_mmio); - if (adapter->p2_mmio) + adapter->p1_mmio = NULL; + pci_release_region(to_pci_dev(adapter->dev.parent), 2); + } + if (adapter->p2_mmio) { iounmap(adapter->p2_mmio); + adapter->p2_mmio = NULL; + pci_release_region(to_pci_dev(adapter->dev.parent), 0); + } } static int cxl_read_vsec(struct cxl *adapter, struct pci_dev *dev) @@ -1132,8 +1146,6 @@ static void cxl_remove_adapter(struct cxl *adapter) device_unregister(&adapter->dev); - pci_release_region(pdev, 0); - pci_release_region(pdev, 2); pci_disable_device(pdev); } |