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staging: unisys: visorbus: add error handling to chipset_bus_create 

The function chipset_bus_create should return an error. If an error
is returned, it is assumed the response has not been sent by bus_create.

Correctly handle when the error has been returned in visorchipset.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
David Kershner 2017-03-28 09:34:35 -04:00 committed by Greg Kroah-Hartman
parent e030d39d58
commit 621f5e1852
3 changed files with 17 additions and 10 deletions
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17
drivers/staging/unisys/visorbus/visorbus_main.c
View File

@ -1090,24 +1090,25 @@ remove_all_visor_devices(void)
}
}
void
int
chipset_bus_create(struct visor_device *dev)
{
int rc;
int err;
u32 bus_no = dev->chipset_bus_no;
POSTCODE_LINUX(BUS_CREATE_ENTRY_PC, 0, bus_no, DIAG_SEVERITY_PRINT);
rc = create_bus_instance(dev);
err = create_bus_instance(dev);
POSTCODE_LINUX(BUS_CREATE_EXIT_PC, 0, bus_no, DIAG_SEVERITY_PRINT);
if (rc < 0)
if (err < 0) {
POSTCODE_LINUX(BUS_CREATE_FAILURE_PC, 0, bus_no,
DIAG_SEVERITY_ERR);
else
POSTCODE_LINUX(CHIPSET_INIT_SUCCESS_PC, 0, bus_no,
DIAG_SEVERITY_PRINT);
return err;
}
bus_create_response(dev, rc);
bus_create_response(dev, err);
return 0;
}
void

2
drivers/staging/unisys/visorbus/visorbus_private.h
View File

@ -27,7 +27,7 @@
* command line
*/
void chipset_bus_create(struct visor_device *bus_info);
int chipset_bus_create(struct visor_device *bus_info);
void chipset_bus_destroy(struct visor_device *bus_info);
void chipset_device_create(struct visor_device *dev_info);
void chipset_device_destroy(struct visor_device *dev_info);

8
drivers/staging/unisys/visorbus/visorchipset.c
View File

@ -656,11 +656,17 @@ bus_create(struct controlvm_message *inmsg)
bus_info->visorchannel = visorchannel;
/* Response will be handled by chipset_bus_create */
chipset_bus_create(bus_info);
err = chipset_bus_create(bus_info);
/* If error chipset_bus_create didn't respond, need to respond here */
if (err)
goto err_destroy_channel;
POSTCODE_LINUX(BUS_CREATE_EXIT_PC, 0, bus_no, DIAG_SEVERITY_PRINT);
return 0;
err_destroy_channel:
visorchannel_destroy(visorchannel);
err_free_pending_msg:
kfree(bus_info->pending_msg_hdr);