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Use the magic of common symbols to allow struct dev to effectively grow at

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link time to accommodate whatever bus objects are included.
This commit is contained in:
Michael Brown
2005-04-14 10:10:54 +00:00
parent 0dc98309b2
commit 75d864432c
8 changed files with 84 additions and 49 deletions
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22
src/drivers/bus/mca.c
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@@ -19,6 +19,14 @@
#define DBG(...)
#endif
/*
* Ensure that there is sufficient space in the shared dev_bus
* structure for a struct pci_device.
*
*/
DEV_BUS( struct mca_device, mca_dev );
static char mca_magic[0]; /* guaranteed unique symbol */
/*
* Fill in parameters for an MCA device based on slot number
*
@@ -53,14 +61,14 @@ static int fill_mca_device ( struct mca_device *mca ) {
* Obtain a struct mca * from a struct dev *
*
* If dev has not previously been used for an MCA device scan, blank
* out dev.mca
* out struct mca
*/
struct mca_device * mca_device ( struct dev *dev ) {
struct mca_device *mca = &dev->mca;
struct mca_device *mca = dev->bus;
if ( dev->devid.bus_type != MCA_BUS_TYPE ) {
if ( mca->magic != mca_magic ) {
memset ( mca, 0, sizeof ( *mca ) );
dev->devid.bus_type = MCA_BUS_TYPE;
mca->magic = mca_magic;
}
mca->dev = dev;
return mca;
@@ -97,8 +105,10 @@ int find_mca_device ( struct mca_device *mca, struct mca_driver *driver ) {
id->name, driver->name, id->id );
if ( mca->dev ) {
mca->dev->name = driver->name;
mca->dev->devid.vendor_id =
GENERIC_MCA_VENDOR;
mca->dev->devid.bus_type
= MCA_BUS_TYPE;
mca->dev->devid.vendor_id
= GENERIC_MCA_VENDOR;
mca->dev->devid.device_id = id->id;
}
mca->already_tried = 1;