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-rw-r--r--include/linux/ssb/ssb.h20
1 files changed, 12 insertions, 8 deletions
diff --git a/include/linux/ssb/ssb.h b/include/linux/ssb/ssb.h
index 3d0a9ff24f0..24f98854736 100644
--- a/include/linux/ssb/ssb.h
+++ b/include/linux/ssb/ssb.h
@@ -269,7 +269,8 @@ struct ssb_bus {
const struct ssb_bus_ops *ops;
- /* The core in the basic address register window. (PCI bus only) */
+ /* The core currently mapped into the MMIO window.
+ * Not valid on all host-buses. So don't use outside of SSB. */
struct ssb_device *mapped_device;
union {
/* Currently mapped PCMCIA segment. (bustype == SSB_BUSTYPE_PCMCIA only) */
@@ -281,14 +282,17 @@ struct ssb_bus {
* On PCMCIA-host busses this is used to protect the whole MMIO access. */
spinlock_t bar_lock;
- /* The bus this backplane is running on. */
+ /* The host-bus this backplane is running on. */
enum ssb_bustype bustype;
- /* Pointer to the PCI bus (only valid if bustype == SSB_BUSTYPE_PCI). */
- struct pci_dev *host_pci;
- /* Pointer to the PCMCIA device (only if bustype == SSB_BUSTYPE_PCMCIA). */
- struct pcmcia_device *host_pcmcia;
- /* Pointer to the SDIO device (only if bustype == SSB_BUSTYPE_SDIO). */
- struct sdio_func *host_sdio;
+ /* Pointers to the host-bus. Check bustype before using any of these pointers. */
+ union {
+ /* Pointer to the PCI bus (only valid if bustype == SSB_BUSTYPE_PCI). */
+ struct pci_dev *host_pci;
+ /* Pointer to the PCMCIA device (only if bustype == SSB_BUSTYPE_PCMCIA). */
+ struct pcmcia_device *host_pcmcia;
+ /* Pointer to the SDIO device (only if bustype == SSB_BUSTYPE_SDIO). */
+ struct sdio_func *host_sdio;
+ };
/* See enum ssb_quirks */
unsigned int quirks;