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Subject[101/105] atm/solos-pci: Dont flap VCs when carrier state changes
2.6.38-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Philip A. Prindeville <philipp@redfish-solutions.com>

commit c031235b395433350f25943b7580a5e343c7b7b2 upstream.

Don't flap VCs when carrier state changes; higher-level protocols
can detect loss of connectivity and act accordingly. This is more
consistent with how other network interfaces work.

We no longer use release_vccs() so we can delete it.

release_vccs() was duplicated from net/atm/common.c; make the
corresponding function exported, since other code duplicates it
and could leverage it if it were public.

Signed-off-by: Philip A. Prindeville <philipp@redfish-solutions.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/atm/solos-pci.c | 26 +-------------------------
include/linux/atmdev.h | 1 +
net/atm/common.c | 1 +
3 files changed, 3 insertions(+), 25 deletions(-)

--- a/drivers/atm/solos-pci.c
+++ b/drivers/atm/solos-pci.c
@@ -165,7 +165,6 @@ static uint32_t fpga_tx(struct solos_car
static irqreturn_t solos_irq(int irq, void *dev_id);
static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci);
static int list_vccs(int vci);
-static void release_vccs(struct atm_dev *dev);
static int atm_init(struct solos_card *, struct device *);
static void atm_remove(struct solos_card *);
static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
@@ -384,7 +383,6 @@ static int process_status(struct solos_c
/* Anything but 'Showtime' is down */
if (strcmp(state_str, "Showtime")) {
atm_dev_signal_change(card->atmdev[port], ATM_PHY_SIG_LOST);
- release_vccs(card->atmdev[port]);
dev_info(&card->dev->dev, "Port %d: %s\n", port, state_str);
return 0;
}
@@ -830,28 +828,6 @@ static int list_vccs(int vci)
return num_found;
}

-static void release_vccs(struct atm_dev *dev)
-{
- int i;
-
- write_lock_irq(&vcc_sklist_lock);
- for (i = 0; i < VCC_HTABLE_SIZE; i++) {
- struct hlist_head *head = &vcc_hash[i];
- struct hlist_node *node, *tmp;
- struct sock *s;
- struct atm_vcc *vcc;
-
- sk_for_each_safe(s, node, tmp, head) {
- vcc = atm_sk(s);
- if (vcc->dev == dev) {
- vcc_release_async(vcc, -EPIPE);
- sk_del_node_init(s);
- }
- }
- }
- write_unlock_irq(&vcc_sklist_lock);
-}
-

static int popen(struct atm_vcc *vcc)
{
@@ -1269,7 +1245,7 @@ static int atm_init(struct solos_card *c
card->atmdev[i]->ci_range.vci_bits = 16;
card->atmdev[i]->dev_data = card;
card->atmdev[i]->phy_data = (void *)(unsigned long)i;
- atm_dev_signal_change(card->atmdev[i], ATM_PHY_SIG_UNKNOWN);
+ atm_dev_signal_change(card->atmdev[i], ATM_PHY_SIG_FOUND);

skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
if (!skb) {
--- a/include/linux/atmdev.h
+++ b/include/linux/atmdev.h
@@ -443,6 +443,7 @@ void atm_dev_signal_change(struct atm_de

void vcc_insert_socket(struct sock *sk);

+void atm_dev_release_vccs(struct atm_dev *dev);

/*
* This is approximately the algorithm used by alloc_skb.
--- a/net/atm/common.c
+++ b/net/atm/common.c
@@ -252,6 +252,7 @@ void atm_dev_release_vccs(struct atm_dev
}
write_unlock_irq(&vcc_sklist_lock);
}
+EXPORT_SYMBOL(atm_dev_release_vccs);

static int adjust_tp(struct atm_trafprm *tp, unsigned char aal)
{



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