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staging: fsl-mc: abstract test for existence of fsl-mc bus 

Add function to test for existence of an fsl-mc bus instance
instead of doing this by looking directly at a field in the
bus type struct.

Signed-off-by: Itai Katz <itai.katz@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Itai Katz 2015-10-04 10:09:50 +03:00 committed by Greg Kroah-Hartman
parent 9f31b69559
commit 14f928054a
2 changed files with 13 additions and 2 deletions
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13
drivers/staging/fsl-mc/bus/mc-bus.c
View File

@ -39,7 +39,7 @@ static int fsl_mc_bus_match(struct device *dev, struct device_driver *drv)
bool major_version_mismatch = false;
bool minor_version_mismatch = false;
if (WARN_ON(!fsl_mc_bus_type.dev_root))
if (WARN_ON(!fsl_mc_bus_exists()))
goto out;
if (!mc_drv->match_id_table)
@ -206,6 +206,15 @@ void fsl_mc_driver_unregister(struct fsl_mc_driver *mc_driver)
}
EXPORT_SYMBOL_GPL(fsl_mc_driver_unregister);
/**
* fsl_mc_bus_exists - check if a root dprc exists
*/
bool fsl_mc_bus_exists(void)
{
return fsl_mc_bus_type.dev_root;
}
EXPORT_SYMBOL_GPL(fsl_mc_bus_exists);
static int get_dprc_icid(struct fsl_mc_io *mc_io,
int container_id, u16 *icid)
{
@ -407,7 +416,7 @@ int fsl_mc_device_add(struct dprc_obj_desc *obj_desc,
mc_io2 = mc_io;
if (!fsl_mc_bus_type.dev_root)
if (!fsl_mc_bus_exists())
fsl_mc_bus_type.dev_root = &mc_dev->dev;
}

2
drivers/staging/fsl-mc/include/mc.h
View File

@ -182,6 +182,8 @@ int __must_check __fsl_mc_driver_register(struct fsl_mc_driver *fsl_mc_driver,
void fsl_mc_driver_unregister(struct fsl_mc_driver *driver);
bool fsl_mc_bus_exists(void);
int __must_check fsl_mc_portal_allocate(struct fsl_mc_device *mc_dev,
u16 mc_io_flags,
struct fsl_mc_io **new_mc_io);