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| author | Julian Wiedmann <jwi@linux.vnet.ibm.com> | 2017-09-14 09:52:32 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-09-29 15:51:30 +0200 |
| commit | f9a5d70cfaf3e32308de0abfcc95dafe4e36ea51 (patch) | |
| tree | 6063a9716e4239f50089567a44d48137715dd40b /arch/s390 | |
| parent | bf7fa038707c4c7a51a8f3fc1872a7c0d2adf1d3 (diff) | |
| download | blackbird-op-linux-f9a5d70cfaf3e32308de0abfcc95dafe4e36ea51.tar.gz blackbird-op-linux-f9a5d70cfaf3e32308de0abfcc95dafe4e36ea51.zip | |
s390/ccwgroup: tie a ccwgroup driver to its ccw driver
When grouping devices, the ccwgroup core only checks whether all of the
devices are bound to the same ccw_driver. It has no means of checking
if the requesting ccwgroup driver actually supports this device type.
qeth implements its own device matching in qeth_core_probe_device(),
while ctcm and lcs currently have no sanity-checking at all.
Enable ccwgroup drivers to optionally defer the device type checking to
the ccwgroup core, by specifying their supported ccw_driver.
This allows us drop the device type matching from qeth, and improves
the robustness of ctcm and lcs.
Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Acked-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/ccwgroup.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/include/asm/ccwgroup.h b/arch/s390/include/asm/ccwgroup.h index 057ce0ca6377..6d50e86dd0e8 100644 --- a/arch/s390/include/asm/ccwgroup.h +++ b/arch/s390/include/asm/ccwgroup.h @@ -41,6 +41,7 @@ struct ccwgroup_device { * @thaw: undo work done in @freeze * @restore: callback for restoring after hibernation * @driver: embedded driver structure + * @ccw_driver: supported ccw_driver (optional) */ struct ccwgroup_driver { int (*setup) (struct ccwgroup_device *); @@ -55,6 +56,7 @@ struct ccwgroup_driver { int (*restore)(struct ccwgroup_device *); struct device_driver driver; + struct ccw_driver *ccw_driver; }; extern int ccwgroup_driver_register (struct ccwgroup_driver *cdriver); |
