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Subject[patch] patch-2.4.1-irda4 (irlap speed)
Linus,

Here is a patch that fixes some IrDA problems with speed
changes in the IrLAP layer, and also a missing kfree's in all
of the IrDA device drivers. This patch is also credited
Jean Tourrilhes. It's been tested for a month or so by
the Linux-IrDA mailing-list, and found to be working OK.

Please apply to your latest 2.4 code.

-- Dag

diff -urpN linux-2.4.1-patch/net/irda/irlap.c linux-2.4.1-irda-patch/net/irda/irlap.c
--- linux-2.4.1-patch/net/irda/irlap.c Sun Nov 12 03:11:23 2000
+++ linux-2.4.1-irda-patch/net/irda/irlap.c Thu Feb 8 22:34:14 2001
@@ -998,7 +998,7 @@ void irlap_init_qos_capabilities(struct
}

/*
- * Function irlap_apply_default_connection_parameters (void)
+ * Function irlap_apply_default_connection_parameters (void, now)
*
* Use the default connection and transmission parameters
*
@@ -1010,14 +1010,16 @@ void irlap_apply_default_connection_para
ASSERT(self != NULL, return;);
ASSERT(self->magic == LAP_MAGIC, return;);

+ /* xbofs : Default value in NDM */
+ self->next_bofs = 12;
+ self->bofs_count = 12;
+
+ /* NDM Speed is 9600 */
irlap_change_speed(self, 9600, TRUE);

/* Set mbusy when going to NDM state */
irda_device_set_media_busy(self->netdev, TRUE);

- /* Default value in NDM */
- self->bofs_count = 12;
-
/*
* Generate random connection address for this session, which must
* be 7 bits wide and different from 0x00 and 0xfe
@@ -1056,23 +1058,31 @@ void irlap_apply_default_connection_para
}

/*
- * Function irlap_apply_connection_parameters (qos)
+ * Function irlap_apply_connection_parameters (qos, now)
*
* Initialize IrLAP with the negotiated QoS values
*
+ * If 'now' is false, the speed and xbofs will be changed after the next
+ * frame is sent.
+ * If 'now' is true, the speed and xbofs is changed immediately
*/
-void irlap_apply_connection_parameters(struct irlap_cb *self)
+void irlap_apply_connection_parameters(struct irlap_cb *self, int now)
{
IRDA_DEBUG(4, __FUNCTION__ "()\n");

ASSERT(self != NULL, return;);
ASSERT(self->magic == LAP_MAGIC, return;);

- irlap_change_speed(self, self->qos_tx.baud_rate.value, FALSE);
+ /* Set the negociated xbofs value */
+ self->next_bofs = self->qos_tx.additional_bofs.value;
+ if(now)
+ self->bofs_count = self->next_bofs;
+
+ /* Set the negociated link speed (may need the new xbofs value) */
+ irlap_change_speed(self, self->qos_tx.baud_rate.value, now);

self->window_size = self->qos_tx.window_size.value;
self->window = self->qos_tx.window_size.value;
- self->bofs_count = self->qos_tx.additional_bofs.value;

/*
* Calculate how many bytes it is possible to transmit before the
diff -urpN linux-2.4.1-patch/net/irda/irlap_event.c linux-2.4.1-irda-patch/net/irda/irlap_event.c
--- linux-2.4.1-patch/net/irda/irlap_event.c Tue Nov 28 03:07:31 2000
+++ linux-2.4.1-irda-patch/net/irda/irlap_event.c Thu Feb 8 22:34:14 2001
@@ -684,25 +684,26 @@ static int irlap_state_conn(struct irlap

irlap_initiate_connection_state(self);

-#if 0
/*
- * We are allowed to send two frames, but this may increase
- * the connect latency, so lets not do it for now.
+ * Applying the parameters now will make sure we change speed
+ * *after* we have sent the next frame
*/
- irlap_send_ua_response_frame(self, &self->qos_rx);
-#endif
+ irlap_apply_connection_parameters(self, FALSE);

/*
- * Applying the parameters now will make sure we change speed
- * after we have sent the next frame
+ * Sending this frame will force a speed change after it has
+ * been sent (i.e. the frame will be sent at 9600).
*/
- irlap_apply_connection_parameters(self);
+ irlap_send_ua_response_frame(self, &self->qos_rx);

+#if 0
/*
- * Sending this frame will force a speed change after it has
- * been sent
+ * We are allowed to send two frames, but this may increase
+ * the connect latency, so lets not do it for now.
*/
+ /* What the hell is this ? - Jean II */
irlap_send_ua_response_frame(self, &self->qos_rx);
+#endif

/*
* The WD-timer could be set to the duration of the P-timer
@@ -794,8 +795,9 @@ static int irlap_state_setup(struct irla

irlap_qos_negotiate(self, skb);

+ /* Send UA frame and then change link settings */
+ irlap_apply_connection_parameters(self, FALSE);
irlap_send_ua_response_frame(self, &self->qos_rx);
- irlap_apply_connection_parameters(self);

irlap_next_state(self, LAP_NRM_S);
irlap_connect_confirm(self, skb);
@@ -827,10 +829,19 @@ static int irlap_state_setup(struct irla

irlap_qos_negotiate(self, skb);

- irlap_apply_connection_parameters(self);
+ /* Set the new link setting *now* (before the rr frame) */
+ irlap_apply_connection_parameters(self, TRUE);
self->retry_count = 0;

- /* This frame will actually force the speed change */
+ /* Wait for turnaround time to give a chance to the other
+ * device to be ready to receive us.
+ * Note : the time to switch speed is typically larger
+ * than the turnaround time, but as we don't have the other
+ * side speed switch time, that's our best guess...
+ * Jean II */
+ irlap_wait_min_turn_around(self, &self->qos_tx);
+
+ /* This frame will actually be sent at the new speed */
irlap_send_rr_frame(self, CMD_FRAME);

irlap_start_final_timer(self, self->final_timeout/2);
@@ -991,7 +1002,8 @@ static int irlap_state_pclose(struct irl
case RECV_UA_RSP: /* FALLTHROUGH */
case RECV_DM_RSP:
del_timer(&self->final_timer);
-
+
+ /* Set new link parameters */
irlap_apply_default_connection_parameters(self);

/* Always switch state before calling upper layers */
@@ -1944,10 +1956,13 @@ static int irlap_state_nrm_s(struct irla
/* Always switch state before calling upper layers */
irlap_next_state(self, LAP_NDM);

+ /* Send disconnect response */
irlap_wait_min_turn_around(self, &self->qos_tx);
irlap_send_ua_response_frame(self, NULL);
+
del_timer(&self->wd_timer);
irlap_flush_all_queues(self);
+ /* Set default link parameters */
irlap_apply_default_connection_parameters(self);

irlap_disconnect_indication(self, LAP_DISC_INDICATION);
@@ -2000,10 +2015,13 @@ static int irlap_state_sclose(struct irl
case RECV_DISC_CMD:
/* Always switch state before calling upper layers */
irlap_next_state(self, LAP_NDM);
-
+
+ /* Send disconnect response */
irlap_wait_min_turn_around(self, &self->qos_tx);
irlap_send_ua_response_frame(self, NULL);
+
del_timer(&self->wd_timer);
+ /* Set default link parameters */
irlap_apply_default_connection_parameters(self);

irlap_disconnect_indication(self, LAP_DISC_INDICATION);
diff -urpN linux-2.4.1-patch/net/irda/irlap_frame.c linux-2.4.1-irda-patch/net/irda/irlap_frame.c
--- linux-2.4.1-patch/net/irda/irlap_frame.c Sun Nov 12 03:11:23 2000
+++ linux-2.4.1-irda-patch/net/irda/irlap_frame.c Thu Feb 8 22:34:07 2001
@@ -60,7 +60,7 @@ static inline void irlap_insert_info(str
*/
cb->magic = LAP_MAGIC;
cb->mtt = self->mtt_required;
- cb->speed = self->speed;
+ cb->next_speed = self->speed;

/* Reset */
self->mtt_required = 0;
@@ -70,10 +70,13 @@ static inline void irlap_insert_info(str
* force the negotiated minimum turnaround time
*/
cb->xbofs = self->bofs_count;
+ cb->next_xbofs = self->next_bofs;
cb->xbofs_delay = self->xbofs_delay;

/* Reset XBOF's delay (used only for getting min turn time) */
self->xbofs_delay = 0;
+ /* Put the correct xbofs value for the next packet */
+ self->bofs_count = self->next_bofs;
}

/*
diff -urpN linux-2.4.1-patch/net/irda/irttp.c linux-2.4.1-irda-patch/net/irda/irttp.c
--- linux-2.4.1-patch/net/irda/irttp.c Sun Nov 12 03:11:23 2000
+++ linux-2.4.1-irda-patch/net/irda/irttp.c Thu Feb 8 22:34:07 2001
@@ -139,6 +139,15 @@ struct tsap_cb *irttp_open_tsap(__u8 sts
ASSERT(irttp != NULL, return NULL;);
ASSERT(irttp->magic == TTP_MAGIC, return NULL;);

+ /* The IrLMP spec (IrLMP 1.1 p10) says that we have the right to
+ * use only 0x01-0x6F. Of course, we can use LSAP_ANY as well.
+ * JeanII */
+ if((stsap_sel != LSAP_ANY) &&
+ ((stsap_sel < 0x01) || (stsap_sel >= 0x70))) {
+ IRDA_DEBUG(0, __FUNCTION__ "(), invalid tsap!\n");
+ return NULL;
+ }
+
self = kmalloc(sizeof(struct tsap_cb), GFP_ATOMIC);
if (self == NULL) {
IRDA_DEBUG(0, __FUNCTION__ "(), unable to kmalloc!\n");
@@ -1564,9 +1573,9 @@ int irttp_proc_read(char *buf, char **st
self->remote_credit);
len += sprintf(buf+len, "send credit: %d\n",
self->send_credit);
- len += sprintf(buf+len, " tx packets: %d, ",
+ len += sprintf(buf+len, " tx packets: %ld, ",
self->stats.tx_packets);
- len += sprintf(buf+len, "rx packets: %d, ",
+ len += sprintf(buf+len, "rx packets: %ld, ",
self->stats.rx_packets);
len += sprintf(buf+len, "tx_queue len: %d ",
skb_queue_len(&self->tx_queue));
diff -urpN linux-2.4.1-patch/include/net/irda/irda.h linux-2.4.1-irda-patch/include/net/irda/irda.h
--- linux-2.4.1-patch/include/net/irda/irda.h Tue Jan 30 08:25:32 2001
+++ linux-2.4.1-irda-patch/include/net/irda/irda.h Thu Feb 8 22:34:07 2001
@@ -177,9 +177,10 @@ typedef union {
*/
struct irda_skb_cb {
magic_t magic; /* Be sure that we can trust the information */
- __u32 speed; /* The Speed this frame should be sent with */
+ __u32 next_speed; /* The Speed to be set *after* this frame */
__u16 mtt; /* Minimum turn around time */
__u16 xbofs; /* Number of xbofs required, used by SIR mode */
+ __u16 next_xbofs; /* Number of xbofs required *after* this frame */
void *context; /* May be used by drivers */
void (*destructor)(struct sk_buff *skb); /* Used for flow control */
__u16 xbofs_delay; /* Number of xbofs used for generating the mtt */
diff -urpN linux-2.4.1-patch/include/net/irda/irda_device.h linux-2.4.1-irda-patch/include/net/irda/irda_device.h
--- linux-2.4.1-patch/include/net/irda/irda_device.h Tue Jan 30 08:24:54 2001
+++ linux-2.4.1-irda-patch/include/net/irda/irda_device.h Thu Feb 8 22:34:07 2001
@@ -218,29 +218,54 @@ extern inline __u16 irda_get_mtt(struct
#endif

/*
- * Function irda_get_speed (skb)
+ * Function irda_get_next_speed (skb)
*
- * Extact the speed this frame should be sent out with from the skb
+ * Extract the speed that should be set *after* this frame from the skb
*
+ * Note : return -1 for user space frames
*/
-#define irda_get_speed(skb) ( \
+#define irda_get_next_speed(skb) ( \
(((struct irda_skb_cb*) skb->cb)->magic == LAP_MAGIC) ? \
- ((struct irda_skb_cb *)(skb->cb))->speed : 9600 \
+ ((struct irda_skb_cb *)(skb->cb))->next_speed : -1 \
)

#if 0
-extern inline __u32 irda_get_speed(struct sk_buff *skb)
+extern inline __u32 irda_get_next_speed(struct sk_buff *skb)
{
__u32 speed;

if (((struct irda_skb_cb *)(skb->cb))->magic != LAP_MAGIC)
- speed = 9600;
+ speed = -1;
else
- speed = ((struct irda_skb_cb *)(skb->cb))->speed;
+ speed = ((struct irda_skb_cb *)(skb->cb))->next_speed;

return speed;
}
#endif
+
+/*
+ * Function irda_get_next_xbofs (skb)
+ *
+ * Extract the xbofs that should be set for this frame from the skb
+ *
+ * Note : default to 10 for user space frames
+ */
+#define irda_get_xbofs(skb) ( \
+ (((struct irda_skb_cb*) skb->cb)->magic == LAP_MAGIC) ? \
+ ((struct irda_skb_cb *)(skb->cb))->xbofs : 10 \
+)
+
+/*
+ * Function irda_get_next_xbofs (skb)
+ *
+ * Extract the xbofs that should be set *after* this frame from the skb
+ *
+ * Note : return -1 for user space frames
+ */
+#define irda_get_next_xbofs(skb) ( \
+ (((struct irda_skb_cb*) skb->cb)->magic == LAP_MAGIC) ? \
+ ((struct irda_skb_cb *)(skb->cb))->next_xbofs : -1 \
+)

#endif /* IRDA_DEVICE_H */

diff -urpN linux-2.4.1-patch/include/net/irda/irlap.h linux-2.4.1-irda-patch/include/net/irda/irlap.h
--- linux-2.4.1-patch/include/net/irda/irlap.h Tue Jan 30 08:24:54 2001
+++ linux-2.4.1-irda-patch/include/net/irda/irlap.h Thu Feb 8 22:34:14 2001
@@ -168,7 +168,7 @@ struct irlap_cb {
hashbin_t *discovery_log;
discovery_t *discovery_cmd;

- __u32 speed;
+ __u32 speed; /* Link speed */

struct qos_info qos_tx; /* QoS requested by peer */
struct qos_info qos_rx; /* QoS requested by self */
@@ -179,6 +179,7 @@ struct irlap_cb {
int mtt_required; /* Minumum turnaround time required */
int xbofs_delay; /* Nr of XBOF's used to MTT */
int bofs_count; /* Negotiated extra BOFs */
+ int next_bofs; /* Negotiated extra BOFs after next frame */

#ifdef CONFIG_IRDA_COMPRESSION
struct irda_compressor compressor;
@@ -237,7 +238,7 @@ void irlap_wait_min_turn_around(struct i

void irlap_init_qos_capabilities(struct irlap_cb *, struct qos_info *);
void irlap_apply_default_connection_parameters(struct irlap_cb *self);
-void irlap_apply_connection_parameters(struct irlap_cb *self);
+void irlap_apply_connection_parameters(struct irlap_cb *self, int now);
void irlap_set_local_busy(struct irlap_cb *self, int status);

#define IRLAP_GET_HEADER_SIZE(self) 2 /* Will be different when we get VFIR */
diff -urpN linux-2.4.1-patch/include/net/irda/irlap_frame.h linux-2.4.1-irda-patch/include/net/irda/irlap_frame.h
--- linux-2.4.1-patch/include/net/irda/irlap_frame.h Tue Jan 30 08:24:54 2001
+++ linux-2.4.1-irda-patch/include/net/irda/irlap_frame.h Thu Feb 8 22:34:07 2001
@@ -110,6 +110,7 @@ struct snrm_frame {
__u8 ncaddr;
} PACK;

+void irlap_queue_xmit(struct irlap_cb *self, struct sk_buff *skb);
void irlap_send_discovery_xid_frame(struct irlap_cb *, int S, __u8 s,
__u8 command, discovery_t *discovery);
void irlap_send_snrm_frame(struct irlap_cb *, struct qos_info *);
diff -urpN linux-2.4.1-patch/drivers/net/irda/irport.c linux-2.4.1-irda-patch/drivers/net/irda/irport.c
--- linux-2.4.1-patch/drivers/net/irda/irport.c Mon Nov 13 05:43:07 2000
+++ linux-2.4.1-irda-patch/drivers/net/irda/irport.c Thu Feb 8 22:34:07 2001
@@ -616,7 +616,7 @@ int irport_hard_xmit(struct sk_buff *skb
struct irport_cb *self;
unsigned long flags;
int iobase;
- __u32 speed;
+ __s32 speed;

ASSERT(dev != NULL, return 0;);

@@ -628,12 +628,14 @@ int irport_hard_xmit(struct sk_buff *skb
netif_stop_queue(dev);

/* Check if we need to change the speed */
- if ((speed = irda_get_speed(skb)) != self->io.speed) {
+ speed = irda_get_next_speed(skb);
+ if ((speed != self->io.speed) && (speed != -1)) {
/* Check for empty frame */
if (!skb->len) {
irda_task_execute(self, __irport_change_speed,
irport_change_speed_complete,
NULL, (void *) speed);
+ dev_kfree_skb(skb);
return 0;
} else
self->new_speed = speed;
diff -urpN linux-2.4.1-patch/drivers/net/irda/irtty.c linux-2.4.1-irda-patch/drivers/net/irda/irtty.c
--- linux-2.4.1-patch/drivers/net/irda/irtty.c Thu Feb 8 22:33:50 2001
+++ linux-2.4.1-irda-patch/drivers/net/irda/irtty.c Thu Feb 8 22:34:07 2001
@@ -629,7 +629,7 @@ static int irtty_hard_xmit(struct sk_buf
{
struct irtty_cb *self;
int actual = 0;
- __u32 speed;
+ __s32 speed;

self = (struct irtty_cb *) dev->priv;
ASSERT(self != NULL, return 0;);
@@ -638,12 +638,14 @@ static int irtty_hard_xmit(struct sk_buf
netif_stop_queue(dev);

/* Check if we need to change the speed */
- if ((speed = irda_get_speed(skb)) != self->io.speed) {
+ speed = irda_get_next_speed(skb);
+ if ((speed != self->io.speed) && (speed != -1)) {
/* Check for empty frame */
if (!skb->len) {
irda_task_execute(self, irtty_change_speed,
irtty_change_speed_complete,
NULL, (void *) speed);
+ dev_kfree_skb(skb);
return 0;
} else
self->new_speed = speed;
diff -urpN linux-2.4.1-patch/drivers/net/irda/nsc-ircc.c linux-2.4.1-irda-patch/drivers/net/irda/nsc-ircc.c
--- linux-2.4.1-patch/drivers/net/irda/nsc-ircc.c Tue Nov 28 03:07:31 2000
+++ linux-2.4.1-irda-patch/drivers/net/irda/nsc-ircc.c Thu Feb 8 22:34:07 2001
@@ -1064,7 +1064,7 @@ static int nsc_ircc_hard_xmit_sir(struct
struct nsc_ircc_cb *self;
unsigned long flags;
int iobase;
- __u32 speed;
+ __s32 speed;
__u8 bank;

self = (struct nsc_ircc_cb *) dev->priv;
@@ -1076,10 +1076,12 @@ static int nsc_ircc_hard_xmit_sir(struct
netif_stop_queue(dev);

/* Check if we need to change the speed */
- if ((speed = irda_get_speed(skb)) != self->io.speed) {
+ speed = irda_get_next_speed(skb);
+ if ((speed != self->io.speed) && (speed != -1)) {
/* Check for empty frame */
if (!skb->len) {
nsc_ircc_change_speed(self, speed);
+ dev_kfree_skb(skb);
return 0;
} else
self->new_speed = speed;
@@ -1116,7 +1118,7 @@ static int nsc_ircc_hard_xmit_fir(struct
struct nsc_ircc_cb *self;
unsigned long flags;
int iobase;
- __u32 speed;
+ __s32 speed;
__u8 bank;
int mtt, diff;

@@ -1126,10 +1128,12 @@ static int nsc_ircc_hard_xmit_fir(struct
netif_stop_queue(dev);

/* Check if we need to change the speed */
- if ((speed = irda_get_speed(skb)) != self->io.speed) {
+ speed = irda_get_next_speed(skb);
+ if ((speed != self->io.speed) && (speed != -1)) {
/* Check for empty frame */
if (!skb->len) {
nsc_ircc_change_speed(self, speed);
+ dev_kfree_skb(skb);
return 0;
} else
self->new_speed = speed;
diff -urpN linux-2.4.1-patch/drivers/net/irda/smc-ircc.c linux-2.4.1-irda-patch/drivers/net/irda/smc-ircc.c
--- linux-2.4.1-patch/drivers/net/irda/smc-ircc.c Fri Dec 29 23:07:22 2000
+++ linux-2.4.1-irda-patch/drivers/net/irda/smc-ircc.c Thu Feb 8 22:34:07 2001
@@ -606,7 +606,7 @@ static int ircc_hard_xmit(struct sk_buff
struct irport_cb *irport;
struct ircc_cb *self;
unsigned long flags;
- __u32 speed;
+ __s32 speed;
int iobase;
int mtt;

@@ -619,10 +619,12 @@ static int ircc_hard_xmit(struct sk_buff
netif_stop_queue(dev);

/* Check if we need to change the speed after this frame */
- if ((speed = irda_get_speed(skb)) != self->io.speed) {
+ speed = irda_get_next_speed(skb);
+ if ((speed != self->io.speed) && (speed != -1)) {
/* Check for empty frame */
if (!skb->len) {
ircc_change_speed(self, speed);
+ dev_kfree_skb(skb);
return 0;
} else
self->new_speed = speed;
diff -urpN linux-2.4.1-patch/drivers/net/irda/toshoboe.c linux-2.4.1-irda-patch/drivers/net/irda/toshoboe.c
--- linux-2.4.1-patch/drivers/net/irda/toshoboe.c Thu Jan 4 21:50:12 2001
+++ linux-2.4.1-irda-patch/drivers/net/irda/toshoboe.c Thu Feb 8 22:34:07 2001
@@ -263,7 +263,7 @@ static int
toshoboe_hard_xmit (struct sk_buff *skb, struct net_device *dev)
{
struct toshoboe_cb *self;
- __u32 speed;
+ __s32 speed;
int mtt, len;

self = (struct toshoboe_cb *) dev->priv;
@@ -272,10 +272,12 @@ toshoboe_hard_xmit (struct sk_buff *skb,
);

/* Check if we need to change the speed */
- if ((speed = irda_get_speed(skb)) != self->io.speed) {
+ speed = irda_get_next_speed(skb);
+ if ((speed != self->io.speed) && (speed != -1)) {
/* Check for empty frame */
if (!skb->len) {
toshoboe_setbaud(self, speed);
+ dev_kfree_skb(skb);
return 0;
} else
self->new_speed = speed;
diff -urpN linux-2.4.1-patch/drivers/net/irda/w83977af_ir.c linux-2.4.1-irda-patch/drivers/net/irda/w83977af_ir.c
--- linux-2.4.1-patch/drivers/net/irda/w83977af_ir.c Sun Nov 12 03:11:23 2000
+++ linux-2.4.1-irda-patch/drivers/net/irda/w83977af_ir.c Thu Feb 8 22:34:07 2001
@@ -497,7 +497,7 @@ void w83977af_change_speed(struct w83977
int w83977af_hard_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct w83977af_ir *self;
- __u32 speed;
+ __s32 speed;
int iobase;
__u8 set;
int mtt;
@@ -513,10 +513,12 @@ int w83977af_hard_xmit(struct sk_buff *s
netif_stop_queue(dev);

/* Check if we need to change the speed */
- if ((speed = irda_get_speed(skb)) != self->io.speed) {
+ speed = irda_get_next_speed(skb);
+ if ((speed != self->io.speed) && (speed != -1)) {
/* Check for empty frame */
if (!skb->len) {
w83977af_change_speed(self, speed);
+ dev_kfree_skb(skb);
return 0;
} else
self->new_speed = speed;
-
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