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staging: ozwpan: Simplify app interface

Browse source 
Simplify the somewhat overcomplicated application interface; improves
readability and saves a bunch of lines.

Use designated struct initializers for clarity.

Signed-off-by: Christoph Jaeger <email@christophjaeger.info>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christoph Jaeger 2014-08-04 14:54:52 +02:00 committed by Greg Kroah-Hartman
parent a7ae725c92
commit a9686e7868
8 changed files with 82 additions and 150 deletions
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30
drivers/staging/ozwpan/ozcdev.c
View file

@ -49,11 +49,11 @@ static struct oz_serial_ctx *oz_cdev_claim_ctx(struct oz_pd *pd)
{
struct oz_serial_ctx *ctx;
spin_lock_bh(&pd->app_lock[OZ_APPID_SERIAL-1]);
ctx = (struct oz_serial_ctx *)pd->app_ctx[OZ_APPID_SERIAL-1];
spin_lock_bh(&pd->app_lock[OZ_APPID_SERIAL]);
ctx = (struct oz_serial_ctx *) pd->app_ctx[OZ_APPID_SERIAL];
if (ctx)
atomic_inc(&ctx->ref_count);
spin_unlock_bh(&pd->app_lock[OZ_APPID_SERIAL-1]);
spin_unlock_bh(&pd->app_lock[OZ_APPID_SERIAL]);
return ctx;
}
@ -182,8 +182,8 @@ static ssize_t oz_cdev_write(struct file *filp, const char __user *buf,
app_hdr->app_id = OZ_APPID_SERIAL;
if (copy_from_user(app_hdr+1, buf, count))
goto out;
spin_lock_bh(&pd->app_lock[OZ_APPID_USB-1]);
ctx = (struct oz_serial_ctx *)pd->app_ctx[OZ_APPID_SERIAL-1];
spin_lock_bh(&pd->app_lock[OZ_APPID_USB]);
ctx = (struct oz_serial_ctx *) pd->app_ctx[OZ_APPID_SERIAL];
if (ctx) {
app_hdr->elt_seq_num = ctx->tx_seq_num++;
if (ctx->tx_seq_num == 0)
@ -193,7 +193,7 @@ static ssize_t oz_cdev_write(struct file *filp, const char __user *buf,
ei = NULL;
spin_unlock(&eb->lock);
}
spin_unlock_bh(&pd->app_lock[OZ_APPID_USB-1]);
spin_unlock_bh(&pd->app_lock[OZ_APPID_USB]);
out:
if (ei) {
count = 0;
@ -436,14 +436,14 @@ int oz_cdev_start(struct oz_pd *pd, int resume)
return -ENOMEM;
atomic_set(&ctx->ref_count, 1);
ctx->tx_seq_num = 1;
spin_lock_bh(&pd->app_lock[OZ_APPID_SERIAL-1]);
old_ctx = pd->app_ctx[OZ_APPID_SERIAL-1];
spin_lock_bh(&pd->app_lock[OZ_APPID_SERIAL]);
old_ctx = pd->app_ctx[OZ_APPID_SERIAL];
if (old_ctx) {
spin_unlock_bh(&pd->app_lock[OZ_APPID_SERIAL-1]);
spin_unlock_bh(&pd->app_lock[OZ_APPID_SERIAL]);
kfree(ctx);
} else {
pd->app_ctx[OZ_APPID_SERIAL-1] = ctx;
spin_unlock_bh(&pd->app_lock[OZ_APPID_SERIAL-1]);
pd->app_ctx[OZ_APPID_SERIAL] = ctx;
spin_unlock_bh(&pd->app_lock[OZ_APPID_SERIAL]);
}
spin_lock(&g_cdev.lock);
if ((g_cdev.active_pd == NULL) &&
@ -468,10 +468,10 @@ void oz_cdev_stop(struct oz_pd *pd, int pause)
oz_dbg(ON, "Serial service paused\n");
return;
}
spin_lock_bh(&pd->app_lock[OZ_APPID_SERIAL-1]);
ctx = (struct oz_serial_ctx *)pd->app_ctx[OZ_APPID_SERIAL-1];
pd->app_ctx[OZ_APPID_SERIAL-1] = NULL;
spin_unlock_bh(&pd->app_lock[OZ_APPID_SERIAL-1]);
spin_lock_bh(&pd->app_lock[OZ_APPID_SERIAL]);
ctx = (struct oz_serial_ctx *) pd->app_ctx[OZ_APPID_SERIAL];
pd->app_ctx[OZ_APPID_SERIAL] = NULL;
spin_unlock_bh(&pd->app_lock[OZ_APPID_SERIAL]);
if (ctx)
oz_cdev_release_ctx(ctx);
spin_lock(&g_cdev.lock);

151
drivers/staging/ozwpan/ozpd.c
View file

@ -32,11 +32,6 @@ static void oz_retire_frame(struct oz_pd *pd, struct oz_tx_frame *f);
static void oz_isoc_stream_free(struct oz_isoc_stream *st);
static int oz_send_next_queued_frame(struct oz_pd *pd, int more_data);
static void oz_isoc_destructor(struct sk_buff *skb);
static int oz_def_app_init(void);
static void oz_def_app_term(void);
static int oz_def_app_start(struct oz_pd *pd, int resume);
static void oz_def_app_stop(struct oz_pd *pd, int pause);
static void oz_def_app_rx(struct oz_pd *pd, struct oz_elt *elt);
/*
* Counts the uncompleted isoc frames submitted to netcard.
@ -45,80 +40,25 @@ static atomic_t g_submitted_isoc = ATOMIC_INIT(0);
/* Application handler functions.
*/
static const struct oz_app_if g_app_if[OZ_APPID_MAX] = {
{oz_usb_init,
oz_usb_term,
oz_usb_start,
oz_usb_stop,
oz_usb_rx,
oz_usb_heartbeat,
oz_usb_farewell,
OZ_APPID_USB},
{oz_def_app_init,
oz_def_app_term,
oz_def_app_start,
oz_def_app_stop,
oz_def_app_rx,
NULL,
NULL,
OZ_APPID_UNUSED1},
{oz_def_app_init,
oz_def_app_term,
oz_def_app_start,
oz_def_app_stop,
oz_def_app_rx,
NULL,
NULL,
OZ_APPID_UNUSED2},
{oz_cdev_init,
oz_cdev_term,
oz_cdev_start,
oz_cdev_stop,
oz_cdev_rx,
NULL,
NULL,
OZ_APPID_SERIAL},
static const struct oz_app_if g_app_if[OZ_NB_APPS] = {
[OZ_APPID_USB] = {
.init = oz_usb_init,
.term = oz_usb_term,
.start = oz_usb_start,
.stop = oz_usb_stop,
.rx = oz_usb_rx,
.heartbeat = oz_usb_heartbeat,
.farewell = oz_usb_farewell,
},
[OZ_APPID_SERIAL] = {
.init = oz_cdev_init,
.term = oz_cdev_term,
.start = oz_cdev_start,
.stop = oz_cdev_stop,
.rx = oz_cdev_rx,
},
};
/*
* Context: process
*/
static int oz_def_app_init(void)
{
return 0;
}
/*
* Context: process
*/
static void oz_def_app_term(void)
{
}
/*
* Context: softirq
*/
static int oz_def_app_start(struct oz_pd *pd, int resume)
{
return 0;
}
/*
* Context: softirq
*/
static void oz_def_app_stop(struct oz_pd *pd, int pause)
{
}
/*
* Context: softirq
*/
static void oz_def_app_rx(struct oz_pd *pd, struct oz_elt *elt)
{
}
/*
* Context: softirq or process
@ -169,7 +109,7 @@ struct oz_pd *oz_pd_alloc(const u8 *mac_addr)
if (pd) {
int i;
atomic_set(&pd->ref_count, 2);
for (i = 0; i < OZ_APPID_MAX; i++)
for (i = 0; i < OZ_NB_APPS; i++)
spin_lock_init(&pd->app_lock[i]);
pd->last_rx_pkt_num = 0xffffffff;
oz_pd_set_state(pd, OZ_PD_S_IDLE);
@ -269,23 +209,21 @@ void oz_pd_destroy(struct oz_pd *pd)
*/
int oz_services_start(struct oz_pd *pd, u16 apps, int resume)
{
const struct oz_app_if *ai;
int rc = 0;
int i, rc = 0;
oz_pd_dbg(pd, ON, "%s: (0x%x) resume(%d)\n", __func__, apps, resume);
for (ai = g_app_if; ai < &g_app_if[OZ_APPID_MAX]; ai++) {
if (apps & (1<<ai->app_id)) {
if (ai->start(pd, resume)) {
for (i = 0; i < OZ_NB_APPS; i++) {
if (g_app_if[i].start && (apps & (1 << i))) {
if (g_app_if[i].start(pd, resume)) {
rc = -1;
oz_pd_dbg(pd, ON,
"Unable to start service %d\n",
ai->app_id);
"Unable to start service %d\n", i);
break;
}
spin_lock_bh(&g_polling_lock);
pd->total_apps |= (1<<ai->app_id);
pd->total_apps |= (1 << i);
if (resume)
pd->paused_apps &= ~(1<<ai->app_id);
pd->paused_apps &= ~(1 << i);
spin_unlock_bh(&g_polling_lock);
}
}
@ -297,20 +235,20 @@ int oz_services_start(struct oz_pd *pd, u16 apps, int resume)
*/
void oz_services_stop(struct oz_pd *pd, u16 apps, int pause)
{
const struct oz_app_if *ai;
int i;
oz_pd_dbg(pd, ON, "%s: (0x%x) pause(%d)\n", __func__, apps, pause);
for (ai = g_app_if; ai < &g_app_if[OZ_APPID_MAX]; ai++) {
if (apps & (1<<ai->app_id)) {
for (i = 0; i < OZ_NB_APPS; i++) {
if (g_app_if[i].stop && (apps & (1 << i))) {
spin_lock_bh(&g_polling_lock);
if (pause) {
pd->paused_apps |= (1<<ai->app_id);
pd->paused_apps |= (1 << i);
} else {
pd->total_apps &= ~(1<<ai->app_id);
pd->paused_apps &= ~(1<<ai->app_id);
pd->total_apps &= ~(1 << i);
pd->paused_apps &= ~(1 << i);
}
spin_unlock_bh(&g_polling_lock);
ai->stop(pd, pause);
g_app_if[i].stop(pd, pause);
}
}
}
@ -320,12 +258,11 @@ void oz_services_stop(struct oz_pd *pd, u16 apps, int pause)
*/
void oz_pd_heartbeat(struct oz_pd *pd, u16 apps)
{
const struct oz_app_if *ai;
int more = 0;
int i, more = 0;
for (ai = g_app_if; ai < &g_app_if[OZ_APPID_MAX]; ai++) {
if (ai->heartbeat && (apps & (1<<ai->app_id))) {
if (ai->heartbeat(pd))
for (i = 0; i < OZ_NB_APPS; i++) {
if (g_app_if[i].heartbeat && (apps & (1 << i))) {
if (g_app_if[i].heartbeat(pd))
more = 1;
}
}
@ -957,9 +894,10 @@ void oz_apps_init(void)
{
int i;
for (i = 0; i < OZ_APPID_MAX; i++)
for (i = 0; i < OZ_NB_APPS; i++) {
if (g_app_if[i].init)
g_app_if[i].init();
}
}
/*
@ -970,9 +908,10 @@ void oz_apps_term(void)
int i;
/* Terminate all the apps. */
for (i = 0; i < OZ_APPID_MAX; i++)
for (i = 0; i < OZ_NB_APPS; i++) {
if (g_app_if[i].term)
g_app_if[i].term();
}
}
/*
@ -980,12 +919,8 @@ void oz_apps_term(void)
*/
void oz_handle_app_elt(struct oz_pd *pd, u8 app_id, struct oz_elt *elt)
{
const struct oz_app_if *ai;
if (app_id == 0 || app_id > OZ_APPID_MAX)
return;
ai = &g_app_if[app_id-1];
ai->rx(pd, elt);
if (app_id < OZ_NB_APPS && g_app_if[app_id].rx)
g_app_if[app_id].rx(pd, elt);
}
/*
@ -994,7 +929,7 @@ void oz_handle_app_elt(struct oz_pd *pd, u8 app_id, struct oz_elt *elt)
void oz_pd_indicate_farewells(struct oz_pd *pd)
{
struct oz_farewell *f;
const struct oz_app_if *ai = &g_app_if[OZ_APPID_USB-1];
const struct oz_app_if *ai = &g_app_if[OZ_APPID_USB];
while (1) {
spin_lock_bh(&g_polling_lock);

4
drivers/staging/ozwpan/ozpd.h
View file

@ -81,8 +81,8 @@ struct oz_pd {
unsigned long presleep;
unsigned long keep_alive;
struct oz_elt_buf elt_buff;
void *app_ctx[OZ_APPID_MAX];
spinlock_t app_lock[OZ_APPID_MAX];
void *app_ctx[OZ_NB_APPS];
spinlock_t app_lock[OZ_NB_APPS];
int max_tx_size;
u8 mode;
u8 ms_per_isoc;

2
drivers/staging/ozwpan/ozproto.c
View file

@ -614,7 +614,7 @@ struct oz_pd *oz_pd_find(const u8 *mac_addr)
*/
void oz_app_enable(int app_id, int enable)
{
if (app_id <= OZ_APPID_MAX) {
if (app_id < OZ_NB_APPS) {
spin_lock_bh(&g_polling_lock);
if (enable)
g_apps |= (1<<app_id);

1
drivers/staging/ozwpan/ozproto.h
View file

@ -46,7 +46,6 @@ struct oz_app_if {
oz_app_rx_fn_t rx;
oz_app_heartbeat_fn_t heartbeat;
oz_app_farewell_fn_t farewell;
int app_id;
};
int oz_protocol_init(char *devs);

2
drivers/staging/ozwpan/ozprotocol.h
View file

@ -139,8 +139,6 @@ struct oz_app_hdr {
/* Values for app_id.
*/
#define OZ_APPID_USB 0x1
#define OZ_APPID_UNUSED1 0x2
#define OZ_APPID_UNUSED2 0x3
#define OZ_APPID_SERIAL 0x4
#define OZ_APPID_MAX OZ_APPID_SERIAL
#define OZ_NB_APPS (OZ_APPID_MAX+1)

30
drivers/staging/ozwpan/ozusbsvc.c
View file

@ -73,12 +73,12 @@ int oz_usb_start(struct oz_pd *pd, int resume)
* If it does already have one then destroy the one we have just
* created.
*/
spin_lock_bh(&pd->app_lock[OZ_APPID_USB-1]);
old_ctx = pd->app_ctx[OZ_APPID_USB-1];
spin_lock_bh(&pd->app_lock[OZ_APPID_USB]);
old_ctx = pd->app_ctx[OZ_APPID_USB];
if (old_ctx == NULL)
pd->app_ctx[OZ_APPID_USB-1] = usb_ctx;
oz_usb_get(pd->app_ctx[OZ_APPID_USB-1]);
spin_unlock_bh(&pd->app_lock[OZ_APPID_USB-1]);
pd->app_ctx[OZ_APPID_USB] = usb_ctx;
oz_usb_get(pd->app_ctx[OZ_APPID_USB]);
spin_unlock_bh(&pd->app_lock[OZ_APPID_USB]);
if (old_ctx) {
oz_dbg(ON, "Already have USB context\n");
kfree(usb_ctx);
@ -99,9 +99,9 @@ int oz_usb_start(struct oz_pd *pd, int resume)
usb_ctx->hport = oz_hcd_pd_arrived(usb_ctx);
if (usb_ctx->hport == NULL) {
oz_dbg(ON, "USB hub returned null port\n");
spin_lock_bh(&pd->app_lock[OZ_APPID_USB-1]);
pd->app_ctx[OZ_APPID_USB-1] = NULL;
spin_unlock_bh(&pd->app_lock[OZ_APPID_USB-1]);
spin_lock_bh(&pd->app_lock[OZ_APPID_USB]);
pd->app_ctx[OZ_APPID_USB] = NULL;
spin_unlock_bh(&pd->app_lock[OZ_APPID_USB]);
oz_usb_put(usb_ctx);
rc = -1;
}
@ -122,10 +122,10 @@ void oz_usb_stop(struct oz_pd *pd, int pause)
oz_dbg(ON, "USB service paused\n");
return;
}
spin_lock_bh(&pd->app_lock[OZ_APPID_USB-1]);
usb_ctx = (struct oz_usb_ctx *)pd->app_ctx[OZ_APPID_USB-1];
pd->app_ctx[OZ_APPID_USB-1] = NULL;
spin_unlock_bh(&pd->app_lock[OZ_APPID_USB-1]);
spin_lock_bh(&pd->app_lock[OZ_APPID_USB]);
usb_ctx = (struct oz_usb_ctx *) pd->app_ctx[OZ_APPID_USB];
pd->app_ctx[OZ_APPID_USB] = NULL;
spin_unlock_bh(&pd->app_lock[OZ_APPID_USB]);
if (usb_ctx) {
struct timespec ts, now;
getnstimeofday(&ts);
@ -187,11 +187,11 @@ int oz_usb_heartbeat(struct oz_pd *pd)
struct oz_usb_ctx *usb_ctx;
int rc = 0;
spin_lock_bh(&pd->app_lock[OZ_APPID_USB-1]);
usb_ctx = (struct oz_usb_ctx *)pd->app_ctx[OZ_APPID_USB-1];
spin_lock_bh(&pd->app_lock[OZ_APPID_USB]);
usb_ctx = (struct oz_usb_ctx *) pd->app_ctx[OZ_APPID_USB];
if (usb_ctx)
oz_usb_get(usb_ctx);
spin_unlock_bh(&pd->app_lock[OZ_APPID_USB-1]);
spin_unlock_bh(&pd->app_lock[OZ_APPID_USB]);
if (usb_ctx == NULL)
return rc;
if (usb_ctx->stopped)

12
drivers/staging/ozwpan/ozusbsvc1.c
View file

@ -364,11 +364,11 @@ void oz_usb_rx(struct oz_pd *pd, struct oz_elt *elt)
struct oz_usb_hdr *usb_hdr = (struct oz_usb_hdr *)(elt + 1);
struct oz_usb_ctx *usb_ctx;
spin_lock_bh(&pd->app_lock[OZ_APPID_USB-1]);
usb_ctx = (struct oz_usb_ctx *)pd->app_ctx[OZ_APPID_USB-1];
spin_lock_bh(&pd->app_lock[OZ_APPID_USB]);
usb_ctx = (struct oz_usb_ctx *)pd->app_ctx[OZ_APPID_USB];
if (usb_ctx)
oz_usb_get(usb_ctx);
spin_unlock_bh(&pd->app_lock[OZ_APPID_USB-1]);
spin_unlock_bh(&pd->app_lock[OZ_APPID_USB]);
if (usb_ctx == NULL)
return; /* Context has gone so nothing to do. */
if (usb_ctx->stopped)
@ -434,11 +434,11 @@ void oz_usb_farewell(struct oz_pd *pd, u8 ep_num, u8 *data, u8 len)
{
struct oz_usb_ctx *usb_ctx;
spin_lock_bh(&pd->app_lock[OZ_APPID_USB-1]);
usb_ctx = (struct oz_usb_ctx *)pd->app_ctx[OZ_APPID_USB-1];
spin_lock_bh(&pd->app_lock[OZ_APPID_USB]);
usb_ctx = (struct oz_usb_ctx *)pd->app_ctx[OZ_APPID_USB];
if (usb_ctx)
oz_usb_get(usb_ctx);
spin_unlock_bh(&pd->app_lock[OZ_APPID_USB-1]);
spin_unlock_bh(&pd->app_lock[OZ_APPID_USB]);
if (usb_ctx == NULL)
return; /* Context has gone so nothing to do. */
if (!usb_ctx->stopped) {