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staging: unisys: Convert bus functions to pass bus_info pointer around

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Most bus functions pass bus_no around and then do a lookup inside each
function to find the bus_info struct.  Instead just pass the pointer.

This prepares us for a later conversion to using visor_device.

Signed-off-by: Don Zickus <dzickus@redhat.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Don Zickus 2015-05-13 13:22:24 -04:00 committed by Greg Kroah-Hartman
parent 5ecbd5d46d
commit 3032aeddd8
3 changed files with 42 additions and 52 deletions
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44
drivers/staging/unisys/visorbus/visorbus_main.c
View File

@ -108,8 +108,8 @@ static long long bus_count; /** number of bus instances */
static long long total_devices_created;
/** ever-increasing */
static void chipset_bus_create(u32 bus_no);
static void chipset_bus_destroy(u32 bus_no);
static void chipset_bus_create(struct visorchipset_bus_info *bus_info);
static void chipset_bus_destroy(struct visorchipset_bus_info *bus_info);
static void chipset_device_create(u32 bus_no, u32 dev_no);
static void chipset_device_destroy(u32 bus_no, u32 dev_no);
static void chipset_device_pause(u32 bus_no, u32 dev_no);
@ -1331,11 +1331,11 @@ fix_vbus_dev_info(struct visor_device *visordev)
/** Create a device instance for the visor bus itself.
*/
static struct visorbus_devdata *
create_bus_instance(int id)
create_bus_instance(struct visorchipset_bus_info *bus_info)
{
struct visorbus_devdata *rc = NULL;
struct visorbus_devdata *devdata = NULL;
struct visorchipset_bus_info bus_info;
int id = bus_info->bus_no;
POSTCODE_LINUX_2(BUS_CREATE_ENTRY_PC, POSTCODE_SEVERITY_INFO);
devdata = kzalloc(sizeof(*devdata), GFP_KERNEL);
@ -1355,15 +1355,14 @@ create_bus_instance(int id)
goto away;
}
devdata->devno = id;
if ((visorchipset_get_bus_info(id, &bus_info)) &&
(bus_info.chan_info.channel_addr > 0) &&
(bus_info.chan_info.n_channel_bytes > 0)) {
u64 channel_addr = bus_info.chan_info.channel_addr;
if ((bus_info->chan_info.channel_addr > 0) &&
(bus_info->chan_info.n_channel_bytes > 0)) {
u64 channel_addr = bus_info->chan_info.channel_addr;
unsigned long n_channel_bytes =
(unsigned long)
bus_info.chan_info.n_channel_bytes;
bus_info->chan_info.n_channel_bytes;
uuid_le channel_type_guid =
bus_info.chan_info.channel_type_uuid;
bus_info->chan_info.channel_type_uuid;
devdata->chan = visorchannel_create(channel_addr,
n_channel_bytes,
@ -1373,7 +1372,7 @@ create_bus_instance(int id)
POSTCODE_LINUX_3(DEVICE_CREATE_FAILURE_PC, channel_addr,
POSTCODE_SEVERITY_ERR);
} else {
if (bus_info.flags.server) {
if (bus_info->flags.server) {
init_vbus_channel(devdata->chan);
} else {
if (get_vbus_header_info(devdata->chan,
@ -1466,19 +1465,17 @@ static unsigned long test_bus_nos[MAXDEVICETEST];
static unsigned long test_dev_nos[MAXDEVICETEST];
static void
chipset_bus_create(u32 bus_no)
chipset_bus_create(struct visorchipset_bus_info *bus_info)
{
struct visorchipset_bus_info bus_info;
struct visorbus_devdata *devdata;
int rc = -1;
u32 bus_no = bus_info->bus_no;
POSTCODE_LINUX_3(BUS_CREATE_ENTRY_PC, bus_no, POSTCODE_SEVERITY_INFO);
if (!visorchipset_get_bus_info(bus_no, &bus_info))
goto away;
devdata = create_bus_instance(bus_no);
devdata = create_bus_instance(bus_info);
if (!devdata)
goto away;
if (!visorchipset_set_bus_context(bus_no, devdata))
if (!visorchipset_set_bus_context(bus_info, devdata))
goto away;
POSTCODE_LINUX_3(BUS_CREATE_EXIT_PC, bus_no, POSTCODE_SEVERITY_INFO);
rc = 0;
@ -1491,30 +1488,27 @@ away:
POSTCODE_LINUX_3(CHIPSET_INIT_SUCCESS_PC, bus_no,
POSTCODE_SEVERITY_INFO);
if (chipset_responders.bus_create)
(*chipset_responders.bus_create) (bus_no, rc);
(*chipset_responders.bus_create) (bus_info, rc);
}
static void
chipset_bus_destroy(u32 bus_no)
chipset_bus_destroy(struct visorchipset_bus_info *bus_info)
{
struct visorchipset_bus_info bus_info;
struct visorbus_devdata *devdata;
int rc = -1;
if (!visorchipset_get_bus_info(bus_no, &bus_info))
goto away;
devdata = (struct visorbus_devdata *)(bus_info.bus_driver_context);
devdata = (struct visorbus_devdata *)(bus_info->bus_driver_context);
if (!devdata)
goto away;
remove_bus_instance(devdata);
if (!visorchipset_set_bus_context(bus_no, NULL))
if (!visorchipset_set_bus_context(bus_info, NULL))
goto away;
rc = 0;
away:
if (rc < 0)
return;
if (chipset_responders.bus_destroy)
(*chipset_responders.bus_destroy)(bus_no, rc);
(*chipset_responders.bus_destroy)(bus_info, rc);
}
static void

11
drivers/staging/unisys/visorbus/visorbus_private.h
View File

@ -104,8 +104,8 @@ struct visorchipset_bus_info {
* visorchipset.)
*/
struct visorchipset_busdev_notifiers {
void (*bus_create)(u32 bus_no);
void (*bus_destroy)(u32 bus_no);
void (*bus_create)(struct visorchipset_bus_info *bus_info);
void (*bus_destroy)(struct visorchipset_bus_info *bus_info);
void (*device_create)(u32 bus_no, u32 dev_no);
void (*device_destroy)(u32 bus_no, u32 dev_no);
void (*device_pause)(u32 bus_no, u32 dev_no);
@ -119,8 +119,8 @@ struct visorchipset_busdev_notifiers {
* -1 = it failed
*/
struct visorchipset_busdev_responders {
void (*bus_create)(u32 bus_no, int response);
void (*bus_destroy)(u32 bus_no, int response);
void (*bus_create)(struct visorchipset_bus_info *p, int response);
void (*bus_destroy)(struct visorchipset_bus_info *p, int response);
void (*device_create)(u32 bus_no, u32 dev_no, int response);
void (*device_destroy)(u32 bus_no, u32 dev_no, int response);
void (*device_pause)(u32 bus_no, u32 dev_no, int response);
@ -142,7 +142,8 @@ bool visorchipset_get_bus_info(u32 bus_no,
struct visorchipset_bus_info *bus_info);
bool visorchipset_get_device_info(u32 bus_no, u32 dev_no,
struct visorchipset_device_info *dev_info);
bool visorchipset_set_bus_context(u32 bus_no, void *context);
bool visorchipset_set_bus_context(struct visorchipset_bus_info *bus_info,
void *context);
/* visorbus init and exit functions */
int visorbus_init(void);

39
drivers/staging/unisys/visorbus/visorchipset.c
View File

@ -228,8 +228,8 @@ static void parahotplug_process_list(void);
*/
static struct visorchipset_busdev_notifiers busdev_notifiers;
static void bus_create_response(u32 bus_no, int response);
static void bus_destroy_response(u32 bus_no, int response);
static void bus_create_response(struct visorchipset_bus_info *p, int response);
static void bus_destroy_response(struct visorchipset_bus_info *p, int response);
static void device_create_response(u32 bus_no, u32 dev_no, int response);
static void device_destroy_response(u32 bus_no, u32 dev_no, int response);
static void device_resume_response(u32 bus_no, u32 dev_no, int response);
@ -958,12 +958,12 @@ enum crash_obj_type {
};
static void
bus_responder(enum controlvm_id cmd_id, u32 bus_no, int response)
bus_responder(enum controlvm_id cmd_id, struct visorchipset_bus_info *p,
int response)
{
struct visorchipset_bus_info *p;
bool need_clear = false;
u32 bus_no = p->bus_no;
p = bus_find(&bus_info_list, bus_no);
if (!p)
return;
@ -1049,15 +1049,12 @@ device_responder(enum controlvm_id cmd_id, u32 bus_no, u32 dev_no, int response)
}
static void
bus_epilog(u32 bus_no,
bus_epilog(struct visorchipset_bus_info *bus_info,
u32 cmd, struct controlvm_message_header *msg_hdr,
int response, bool need_response)
{
struct visorchipset_bus_info *bus_info;
bool notified = false;
bus_info = bus_find(&bus_info_list, bus_no);
if (!bus_info)
return;
@ -1073,13 +1070,13 @@ bus_epilog(u32 bus_no,
switch (cmd) {
case CONTROLVM_BUS_CREATE:
if (busdev_notifiers.bus_create) {
(*busdev_notifiers.bus_create) (bus_no);
(*busdev_notifiers.bus_create) (bus_info);
notified = true;
}
break;
case CONTROLVM_BUS_DESTROY:
if (busdev_notifiers.bus_destroy) {
(*busdev_notifiers.bus_destroy) (bus_no);
(*busdev_notifiers.bus_destroy) (bus_info);
notified = true;
}
break;
@ -1092,7 +1089,7 @@ bus_epilog(u32 bus_no,
*/
;
else
bus_responder(cmd, bus_no, response);
bus_responder(cmd, bus_info, response);
up(&notifier_lock);
}
@ -1236,7 +1233,7 @@ bus_create(struct controlvm_message *inmsg)
POSTCODE_LINUX_3(BUS_CREATE_EXIT_PC, bus_no, POSTCODE_SEVERITY_INFO);
cleanup:
bus_epilog(bus_no, CONTROLVM_BUS_CREATE, &inmsg->hdr,
bus_epilog(bus_info, CONTROLVM_BUS_CREATE, &inmsg->hdr,
rc, inmsg->hdr.flags.response_expected == 1);
}
@ -1254,7 +1251,7 @@ bus_destroy(struct controlvm_message *inmsg)
else if (bus_info->state.created == 0)
rc = -CONTROLVM_RESP_ERROR_ALREADY_DONE;
bus_epilog(bus_no, CONTROLVM_BUS_DESTROY, &inmsg->hdr,
bus_epilog(bus_info, CONTROLVM_BUS_DESTROY, &inmsg->hdr,
rc, inmsg->hdr.flags.response_expected == 1);
}
@ -1295,7 +1292,7 @@ bus_configure(struct controlvm_message *inmsg,
POSTCODE_LINUX_3(BUS_CONFIGURE_EXIT_PC, bus_no,
POSTCODE_SEVERITY_INFO);
}
bus_epilog(bus_no, CONTROLVM_BUS_CONFIGURE, &inmsg->hdr,
bus_epilog(bus_info, CONTROLVM_BUS_CONFIGURE, &inmsg->hdr,
rc, inmsg->hdr.flags.response_expected == 1);
}
@ -2112,15 +2109,15 @@ cleanup:
}
static void
bus_create_response(u32 bus_no, int response)
bus_create_response(struct visorchipset_bus_info *bus_info, int response)
{
bus_responder(CONTROLVM_BUS_CREATE, bus_no, response);
bus_responder(CONTROLVM_BUS_CREATE, bus_info, response);
}
static void
bus_destroy_response(u32 bus_no, int response)
bus_destroy_response(struct visorchipset_bus_info *bus_info, int response)
{
bus_responder(CONTROLVM_BUS_DESTROY, bus_no, response);
bus_responder(CONTROLVM_BUS_DESTROY, bus_info, response);
}
static void
@ -2164,10 +2161,8 @@ visorchipset_get_bus_info(u32 bus_no, struct visorchipset_bus_info *bus_info)
EXPORT_SYMBOL_GPL(visorchipset_get_bus_info);
bool
visorchipset_set_bus_context(u32 bus_no, void *context)
visorchipset_set_bus_context(struct visorchipset_bus_info *p, void *context)
{
struct visorchipset_bus_info *p = bus_find(&bus_info_list, bus_no);
if (!p)
return false;
p->bus_driver_context = context;