* directory of the kernel sources for details.
*/
-#include <linux/sched.h>
#include <linux/bitops.h>
-#include <linux/smp_lock.h>
-#include <linux/interrupt.h>
-
+#include <linux/compiler.h>
+#include <linux/hardirq.h>
+#include <linux/spinlock.h>
+#include <linux/string.h>
+#include <linux/sched.h> /* because linux/wait.h is broken if CONFIG_SMP=n */
+#include <linux/wait.h>
+
+#include <asm/bug.h>
#include <asm/errno.h>
+#include <asm/system.h>
#include "ieee1394.h"
#include "ieee1394_types.h"
#include "hosts.h"
#include "ieee1394_core.h"
-#include "highlevel.h"
-#include "nodemgr.h"
-
+#include "ieee1394_transactions.h"
#define PREP_ASYNC_HEAD_ADDRESS(tc) \
packet->tcode = tc; \
packet->header[1] = (packet->host->node_id << 16) | (addr >> 32); \
packet->header[2] = addr & 0xffffffff
+#ifndef HPSB_DEBUG_TLABELS
+static
+#endif
+DEFINE_SPINLOCK(hpsb_tlabel_lock);
+
+static DECLARE_WAIT_QUEUE_HEAD(tlabel_wq);
static void fill_async_readquad(struct hpsb_packet *packet, u64 addr)
{
- PREP_ASYNC_HEAD_ADDRESS(TCODE_READQ);
- packet->header_size = 12;
- packet->data_size = 0;
- packet->expect_response = 1;
+ PREP_ASYNC_HEAD_ADDRESS(TCODE_READQ);
+ packet->header_size = 12;
+ packet->data_size = 0;
+ packet->expect_response = 1;
}
-static void fill_async_readblock(struct hpsb_packet *packet, u64 addr, int length)
+static void fill_async_readblock(struct hpsb_packet *packet, u64 addr,
+ int length)
{
- PREP_ASYNC_HEAD_ADDRESS(TCODE_READB);
- packet->header[3] = length << 16;
- packet->header_size = 16;
- packet->data_size = 0;
- packet->expect_response = 1;
+ PREP_ASYNC_HEAD_ADDRESS(TCODE_READB);
+ packet->header[3] = length << 16;
+ packet->header_size = 16;
+ packet->data_size = 0;
+ packet->expect_response = 1;
}
-static void fill_async_writequad(struct hpsb_packet *packet, u64 addr, quadlet_t data)
+static void fill_async_writequad(struct hpsb_packet *packet, u64 addr,
+ quadlet_t data)
{
- PREP_ASYNC_HEAD_ADDRESS(TCODE_WRITEQ);
- packet->header[3] = data;
- packet->header_size = 16;
- packet->data_size = 0;
- packet->expect_response = 1;
+ PREP_ASYNC_HEAD_ADDRESS(TCODE_WRITEQ);
+ packet->header[3] = data;
+ packet->header_size = 16;
+ packet->data_size = 0;
+ packet->expect_response = 1;
}
-static void fill_async_writeblock(struct hpsb_packet *packet, u64 addr, int length)
+static void fill_async_writeblock(struct hpsb_packet *packet, u64 addr,
+ int length)
{
- PREP_ASYNC_HEAD_ADDRESS(TCODE_WRITEB);
- packet->header[3] = length << 16;
- packet->header_size = 16;
- packet->expect_response = 1;
- packet->data_size = length + (length % 4 ? 4 - (length % 4) : 0);
+ PREP_ASYNC_HEAD_ADDRESS(TCODE_WRITEB);
+ packet->header[3] = length << 16;
+ packet->header_size = 16;
+ packet->expect_response = 1;
+ packet->data_size = length + (length % 4 ? 4 - (length % 4) : 0);
}
static void fill_async_lock(struct hpsb_packet *packet, u64 addr, int extcode,
- int length)
+ int length)
{
- PREP_ASYNC_HEAD_ADDRESS(TCODE_LOCK_REQUEST);
- packet->header[3] = (length << 16) | extcode;
- packet->header_size = 16;
- packet->data_size = length;
- packet->expect_response = 1;
-}
-
-static void fill_iso_packet(struct hpsb_packet *packet, int length, int channel,
- int tag, int sync)
-{
- packet->header[0] = (length << 16) | (tag << 14) | (channel << 8)
- | (TCODE_ISO_DATA << 4) | sync;
-
- packet->header_size = 4;
- packet->data_size = length;
- packet->type = hpsb_iso;
- packet->tcode = TCODE_ISO_DATA;
+ PREP_ASYNC_HEAD_ADDRESS(TCODE_LOCK_REQUEST);
+ packet->header[3] = (length << 16) | extcode;
+ packet->header_size = 16;
+ packet->data_size = length;
+ packet->expect_response = 1;
}
static void fill_phy_packet(struct hpsb_packet *packet, quadlet_t data)
{
- packet->header[0] = data;
- packet->header[1] = ~data;
- packet->header_size = 8;
- packet->data_size = 0;
- packet->expect_response = 0;
- packet->type = hpsb_raw; /* No CRC added */
- packet->speed_code = IEEE1394_SPEED_100; /* Force speed to be 100Mbps */
+ packet->header[0] = data;
+ packet->header[1] = ~data;
+ packet->header_size = 8;
+ packet->data_size = 0;
+ packet->expect_response = 0;
+ packet->type = hpsb_raw; /* No CRC added */
+ packet->speed_code = IEEE1394_SPEED_100; /* Force speed to be 100Mbps */
}
static void fill_async_stream_packet(struct hpsb_packet *packet, int length,
int channel, int tag, int sync)
{
packet->header[0] = (length << 16) | (tag << 14) | (channel << 8)
- | (TCODE_STREAM_DATA << 4) | sync;
+ | (TCODE_STREAM_DATA << 4) | sync;
packet->header_size = 4;
packet->data_size = length;
packet->tcode = TCODE_ISO_DATA;
}
+/* same as hpsb_get_tlabel, except that it returns immediately */
+static int hpsb_get_tlabel_atomic(struct hpsb_packet *packet)
+{
+ unsigned long flags, *tp;
+ u8 *next;
+ int tlabel, n = NODEID_TO_NODE(packet->node_id);
+
+ /* Broadcast transactions are complete once the request has been sent.
+ * Use the same transaction label for all broadcast transactions. */
+ if (unlikely(n == ALL_NODES)) {
+ packet->tlabel = 0;
+ return 0;
+ }
+ tp = packet->host->tl_pool[n].map;
+ next = &packet->host->next_tl[n];
+
+ spin_lock_irqsave(&hpsb_tlabel_lock, flags);
+ tlabel = find_next_zero_bit(tp, 64, *next);
+ if (tlabel > 63)
+ tlabel = find_first_zero_bit(tp, 64);
+ if (tlabel > 63) {
+ spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
+ return -EAGAIN;
+ }
+ __set_bit(tlabel, tp);
+ *next = (tlabel + 1) & 63;
+ spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
+
+ packet->tlabel = tlabel;
+ return 0;
+}
+
/**
* hpsb_get_tlabel - allocate a transaction label
- * @packet: the packet who's tlabel/tpool we set
+ * @packet: the packet whose tlabel and tl_pool we set
*
* Every asynchronous transaction on the 1394 bus needs a transaction
* label to match the response to the request. This label has to be
* Return value: Zero on success, otherwise non-zero. A non-zero return
* generally means there are no available tlabels. If this is called out
* of interrupt or atomic context, then it will sleep until can return a
- * tlabel.
+ * tlabel or a signal is received.
*/
int hpsb_get_tlabel(struct hpsb_packet *packet)
{
- unsigned long flags;
- struct hpsb_tlabel_pool *tp;
-
- tp = &packet->host->tpool[packet->node_id & NODE_MASK];
-
- if (irqs_disabled() || in_atomic()) {
- if (down_trylock(&tp->count))
- return 1;
- } else {
- down(&tp->count);
- }
-
- spin_lock_irqsave(&tp->lock, flags);
-
- packet->tlabel = find_next_zero_bit(tp->pool, 64, tp->next);
- if (packet->tlabel > 63)
- packet->tlabel = find_first_zero_bit(tp->pool, 64);
- tp->next = (packet->tlabel + 1) % 64;
- /* Should _never_ happen */
- BUG_ON(test_and_set_bit(packet->tlabel, tp->pool));
- tp->allocations++;
- spin_unlock_irqrestore(&tp->lock, flags);
-
- return 0;
+ if (irqs_disabled() || in_atomic())
+ return hpsb_get_tlabel_atomic(packet);
+
+ /* NB: The macro wait_event_interruptible() is called with a condition
+ * argument with side effect. This is only possible because the side
+ * effect does not occur until the condition became true, and
+ * wait_event_interruptible() won't evaluate the condition again after
+ * that. */
+ return wait_event_interruptible(tlabel_wq,
+ !hpsb_get_tlabel_atomic(packet));
}
/**
* hpsb_free_tlabel - free an allocated transaction label
- * @packet: packet whos tlabel/tpool needs to be cleared
+ * @packet: packet whose tlabel and tl_pool needs to be cleared
*
* Frees the transaction label allocated with hpsb_get_tlabel(). The
* tlabel has to be freed after the transaction is complete (i.e. response
*/
void hpsb_free_tlabel(struct hpsb_packet *packet)
{
- unsigned long flags;
- struct hpsb_tlabel_pool *tp;
-
- tp = &packet->host->tpool[packet->node_id & NODE_MASK];
+ unsigned long flags, *tp;
+ int tlabel, n = NODEID_TO_NODE(packet->node_id);
- BUG_ON(packet->tlabel > 63 || packet->tlabel < 0);
+ if (unlikely(n == ALL_NODES))
+ return;
+ tp = packet->host->tl_pool[n].map;
+ tlabel = packet->tlabel;
+ BUG_ON(tlabel > 63 || tlabel < 0);
- spin_lock_irqsave(&tp->lock, flags);
- BUG_ON(!test_and_clear_bit(packet->tlabel, tp->pool));
- spin_unlock_irqrestore(&tp->lock, flags);
+ spin_lock_irqsave(&hpsb_tlabel_lock, flags);
+ BUG_ON(!__test_and_clear_bit(tlabel, tp));
+ spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
- up(&tp->count);
+ wake_up_interruptible(&tlabel_wq);
}
-
-
+/**
+ * hpsb_packet_success - Make sense of the ack and reply codes
+ *
+ * Make sense of the ack and reply codes and return more convenient error codes:
+ * 0 = success. -%EBUSY = node is busy, try again. -%EAGAIN = error which can
+ * probably resolved by retry. -%EREMOTEIO = node suffers from an internal
+ * error. -%EACCES = this transaction is not allowed on requested address.
+ * -%EINVAL = invalid address at node.
+ */
int hpsb_packet_success(struct hpsb_packet *packet)
{
- switch (packet->ack_code) {
- case ACK_PENDING:
- switch ((packet->header[1] >> 12) & 0xf) {
- case RCODE_COMPLETE:
- return 0;
- case RCODE_CONFLICT_ERROR:
- return -EAGAIN;
- case RCODE_DATA_ERROR:
- return -EREMOTEIO;
- case RCODE_TYPE_ERROR:
- return -EACCES;
- case RCODE_ADDRESS_ERROR:
- return -EINVAL;
- default:
- HPSB_ERR("received reserved rcode %d from node %d",
- (packet->header[1] >> 12) & 0xf,
- packet->node_id);
- return -EAGAIN;
- }
- HPSB_PANIC("reached unreachable code 1 in %s", __FUNCTION__);
-
- case ACK_BUSY_X:
- case ACK_BUSY_A:
- case ACK_BUSY_B:
- return -EBUSY;
-
- case ACK_TYPE_ERROR:
- return -EACCES;
-
- case ACK_COMPLETE:
- if (packet->tcode == TCODE_WRITEQ
- || packet->tcode == TCODE_WRITEB) {
- return 0;
- } else {
- HPSB_ERR("impossible ack_complete from node %d "
- "(tcode %d)", packet->node_id, packet->tcode);
- return -EAGAIN;
- }
-
-
- case ACK_DATA_ERROR:
- if (packet->tcode == TCODE_WRITEB
- || packet->tcode == TCODE_LOCK_REQUEST) {
- return -EAGAIN;
- } else {
- HPSB_ERR("impossible ack_data_error from node %d "
- "(tcode %d)", packet->node_id, packet->tcode);
- return -EAGAIN;
- }
-
- case ACK_ADDRESS_ERROR:
- return -EINVAL;
-
- case ACK_TARDY:
- case ACK_CONFLICT_ERROR:
- case ACKX_NONE:
- case ACKX_SEND_ERROR:
- case ACKX_ABORTED:
- case ACKX_TIMEOUT:
- /* error while sending */
- return -EAGAIN;
-
- default:
- HPSB_ERR("got invalid ack %d from node %d (tcode %d)",
- packet->ack_code, packet->node_id, packet->tcode);
- return -EAGAIN;
- }
-
- HPSB_PANIC("reached unreachable code 2 in %s", __FUNCTION__);
+ switch (packet->ack_code) {
+ case ACK_PENDING:
+ switch ((packet->header[1] >> 12) & 0xf) {
+ case RCODE_COMPLETE:
+ return 0;
+ case RCODE_CONFLICT_ERROR:
+ return -EAGAIN;
+ case RCODE_DATA_ERROR:
+ return -EREMOTEIO;
+ case RCODE_TYPE_ERROR:
+ return -EACCES;
+ case RCODE_ADDRESS_ERROR:
+ return -EINVAL;
+ default:
+ HPSB_ERR("received reserved rcode %d from node %d",
+ (packet->header[1] >> 12) & 0xf,
+ packet->node_id);
+ return -EAGAIN;
+ }
+
+ case ACK_BUSY_X:
+ case ACK_BUSY_A:
+ case ACK_BUSY_B:
+ return -EBUSY;
+
+ case ACK_TYPE_ERROR:
+ return -EACCES;
+
+ case ACK_COMPLETE:
+ if (packet->tcode == TCODE_WRITEQ
+ || packet->tcode == TCODE_WRITEB) {
+ return 0;
+ } else {
+ HPSB_ERR("impossible ack_complete from node %d "
+ "(tcode %d)", packet->node_id, packet->tcode);
+ return -EAGAIN;
+ }
+
+ case ACK_DATA_ERROR:
+ if (packet->tcode == TCODE_WRITEB
+ || packet->tcode == TCODE_LOCK_REQUEST) {
+ return -EAGAIN;
+ } else {
+ HPSB_ERR("impossible ack_data_error from node %d "
+ "(tcode %d)", packet->node_id, packet->tcode);
+ return -EAGAIN;
+ }
+
+ case ACK_ADDRESS_ERROR:
+ return -EINVAL;
+
+ case ACK_TARDY:
+ case ACK_CONFLICT_ERROR:
+ case ACKX_NONE:
+ case ACKX_SEND_ERROR:
+ case ACKX_ABORTED:
+ case ACKX_TIMEOUT:
+ /* error while sending */
+ return -EAGAIN;
+
+ default:
+ HPSB_ERR("got invalid ack %d from node %d (tcode %d)",
+ packet->ack_code, packet->node_id, packet->tcode);
+ return -EAGAIN;
+ }
}
struct hpsb_packet *hpsb_make_readpacket(struct hpsb_host *host, nodeid_t node,
u64 addr, size_t length)
{
- struct hpsb_packet *packet;
+ struct hpsb_packet *packet;
if (length == 0)
return NULL;
return packet;
}
-struct hpsb_packet *hpsb_make_writepacket (struct hpsb_host *host, nodeid_t node,
- u64 addr, quadlet_t *buffer, size_t length)
+struct hpsb_packet *hpsb_make_writepacket(struct hpsb_host *host, nodeid_t node,
+ u64 addr, quadlet_t * buffer,
+ size_t length)
{
struct hpsb_packet *packet;
if (!packet)
return NULL;
- if (length % 4) { /* zero padding bytes */
+ if (length % 4) { /* zero padding bytes */
packet->data[length >> 2] = 0;
}
packet->host = host;
return packet;
}
-struct hpsb_packet *hpsb_make_streampacket(struct hpsb_host *host, u8 *buffer, int length,
- int channel, int tag, int sync)
+struct hpsb_packet *hpsb_make_streampacket(struct hpsb_host *host, u8 * buffer,
+ int length, int channel, int tag,
+ int sync)
{
struct hpsb_packet *packet;
if (!packet)
return NULL;
- if (length % 4) { /* zero padding bytes */
+ if (length % 4) { /* zero padding bytes */
packet->data[length >> 2] = 0;
}
packet->host = host;
+ /* Because it is too difficult to determine all PHY speeds and link
+ * speeds here, we use S100... */
+ packet->speed_code = IEEE1394_SPEED_100;
+
+ /* ...and prevent hpsb_send_packet() from overriding it. */
+ packet->node_id = LOCAL_BUS | ALL_NODES;
+
if (hpsb_get_tlabel(packet)) {
hpsb_free_packet(packet);
return NULL;
}
struct hpsb_packet *hpsb_make_lockpacket(struct hpsb_host *host, nodeid_t node,
- u64 addr, int extcode, quadlet_t *data,
- quadlet_t arg)
+ u64 addr, int extcode,
+ quadlet_t * data, quadlet_t arg)
{
struct hpsb_packet *p;
u32 length;
p = hpsb_alloc_packet(8);
- if (!p) return NULL;
+ if (!p)
+ return NULL;
p->host = host;
p->node_id = node;
return p;
}
-struct hpsb_packet *hpsb_make_lock64packet(struct hpsb_host *host, nodeid_t node,
- u64 addr, int extcode, octlet_t *data,
- octlet_t arg)
+struct hpsb_packet *hpsb_make_lock64packet(struct hpsb_host *host,
+ nodeid_t node, u64 addr, int extcode,
+ octlet_t * data, octlet_t arg)
{
struct hpsb_packet *p;
u32 length;
p = hpsb_alloc_packet(16);
- if (!p) return NULL;
+ if (!p)
+ return NULL;
p->host = host;
p->node_id = node;
return p;
}
-struct hpsb_packet *hpsb_make_phypacket(struct hpsb_host *host,
- quadlet_t data)
-{
- struct hpsb_packet *p;
-
- p = hpsb_alloc_packet(0);
- if (!p) return NULL;
-
- p->host = host;
- fill_phy_packet(p, data);
-
- return p;
-}
-
-struct hpsb_packet *hpsb_make_isopacket(struct hpsb_host *host,
- int length, int channel,
- int tag, int sync)
+struct hpsb_packet *hpsb_make_phypacket(struct hpsb_host *host, quadlet_t data)
{
struct hpsb_packet *p;
- p = hpsb_alloc_packet(length);
- if (!p) return NULL;
+ p = hpsb_alloc_packet(0);
+ if (!p)
+ return NULL;
p->host = host;
- fill_iso_packet(p, length, channel, tag, sync);
-
- p->generation = get_hpsb_generation(host);
+ fill_phy_packet(p, data);
return p;
}
* avoid in kernel buffers for user space callers
*/
+/**
+ * hpsb_read - generic read function
+ *
+ * Recognizes the local node ID and act accordingly. Automatically uses a
+ * quadlet read request if @length == 4 and and a block read request otherwise.
+ * It does not yet support lengths that are not a multiple of 4.
+ *
+ * You must explicitly specifiy the @generation for which the node ID is valid,
+ * to avoid sending packets to the wrong nodes when we race with a bus reset.
+ */
int hpsb_read(struct hpsb_host *host, nodeid_t node, unsigned int generation,
- u64 addr, quadlet_t *buffer, size_t length)
+ u64 addr, quadlet_t * buffer, size_t length)
{
- struct hpsb_packet *packet;
- int retval = 0;
-
- if (length == 0)
- return -EINVAL;
+ struct hpsb_packet *packet;
+ int retval = 0;
- BUG_ON(in_interrupt()); // We can't be called in an interrupt, yet
+ if (length == 0)
+ return -EINVAL;
packet = hpsb_make_readpacket(host, node, addr, length);
- if (!packet) {
- return -ENOMEM;
- }
+ if (!packet) {
+ return -ENOMEM;
+ }
packet->generation = generation;
- retval = hpsb_send_packet_and_wait(packet);
+ retval = hpsb_send_packet_and_wait(packet);
if (retval < 0)
goto hpsb_read_fail;
- retval = hpsb_packet_success(packet);
+ retval = hpsb_packet_success(packet);
- if (retval == 0) {
- if (length == 4) {
- *buffer = packet->header[3];
- } else {
- memcpy(buffer, packet->data, length);
- }
- }
+ if (retval == 0) {
+ if (length == 4) {
+ *buffer = packet->header[3];
+ } else {
+ memcpy(buffer, packet->data, length);
+ }
+ }
-hpsb_read_fail:
- hpsb_free_tlabel(packet);
- hpsb_free_packet(packet);
+ hpsb_read_fail:
+ hpsb_free_tlabel(packet);
+ hpsb_free_packet(packet);
- return retval;
+ return retval;
}
-
+/**
+ * hpsb_write - generic write function
+ *
+ * Recognizes the local node ID and act accordingly. Automatically uses a
+ * quadlet write request if @length == 4 and and a block write request
+ * otherwise. It does not yet support lengths that are not a multiple of 4.
+ *
+ * You must explicitly specifiy the @generation for which the node ID is valid,
+ * to avoid sending packets to the wrong nodes when we race with a bus reset.
+ */
int hpsb_write(struct hpsb_host *host, nodeid_t node, unsigned int generation,
- u64 addr, quadlet_t *buffer, size_t length)
+ u64 addr, quadlet_t * buffer, size_t length)
{
struct hpsb_packet *packet;
int retval;
if (length == 0)
return -EINVAL;
- BUG_ON(in_interrupt()); // We can't be called in an interrupt, yet
-
- packet = hpsb_make_writepacket (host, node, addr, buffer, length);
+ packet = hpsb_make_writepacket(host, node, addr, buffer, length);
if (!packet)
return -ENOMEM;
packet->generation = generation;
- retval = hpsb_send_packet_and_wait(packet);
+ retval = hpsb_send_packet_and_wait(packet);
if (retval < 0)
goto hpsb_write_fail;
- retval = hpsb_packet_success(packet);
+ retval = hpsb_packet_success(packet);
-hpsb_write_fail:
- hpsb_free_tlabel(packet);
- hpsb_free_packet(packet);
+ hpsb_write_fail:
+ hpsb_free_tlabel(packet);
+ hpsb_free_packet(packet);
- return retval;
+ return retval;
}
-
int hpsb_lock(struct hpsb_host *host, nodeid_t node, unsigned int generation,
u64 addr, int extcode, quadlet_t *data, quadlet_t arg)
{
- struct hpsb_packet *packet;
- int retval = 0;
-
- BUG_ON(in_interrupt()); // We can't be called in an interrupt, yet
+ struct hpsb_packet *packet;
+ int retval = 0;
packet = hpsb_make_lockpacket(host, node, addr, extcode, data, arg);
- if (!packet)
- return -ENOMEM;
+ if (!packet)
+ return -ENOMEM;
packet->generation = generation;
- retval = hpsb_send_packet_and_wait(packet);
+ retval = hpsb_send_packet_and_wait(packet);
if (retval < 0)
goto hpsb_lock_fail;
- retval = hpsb_packet_success(packet);
+ retval = hpsb_packet_success(packet);
- if (retval == 0) {
- *data = packet->data[0];
- }
+ if (retval == 0)
+ *data = packet->data[0];
hpsb_lock_fail:
- hpsb_free_tlabel(packet);
- hpsb_free_packet(packet);
-
- return retval;
-}
-
-
-int hpsb_send_gasp(struct hpsb_host *host, int channel, unsigned int generation,
- quadlet_t *buffer, size_t length, u32 specifier_id,
- unsigned int version)
-{
- struct hpsb_packet *packet;
- int retval = 0;
- u16 specifier_id_hi = (specifier_id & 0x00ffff00) >> 8;
- u8 specifier_id_lo = specifier_id & 0xff;
-
- HPSB_VERBOSE("Send GASP: channel = %d, length = %Zd", channel, length);
-
- length += 8;
-
- packet = hpsb_make_streampacket(host, NULL, length, channel, 3, 0);
- if (!packet)
- return -ENOMEM;
-
- packet->data[0] = cpu_to_be32((host->node_id << 16) | specifier_id_hi);
- packet->data[1] = cpu_to_be32((specifier_id_lo << 24) | (version & 0x00ffffff));
-
- memcpy(&(packet->data[2]), buffer, length - 8);
-
- packet->generation = generation;
-
- packet->no_waiter = 1;
-
- retval = hpsb_send_packet(packet);
- if (retval < 0)
- hpsb_free_packet(packet);
+ hpsb_free_tlabel(packet);
+ hpsb_free_packet(packet);
return retval;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff