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Diffstat (limited to 'net/ncsi/ncsi-manage.c')
-rw-r--r--net/ncsi/ncsi-manage.c71
1 files changed, 54 insertions, 17 deletions
diff --git a/net/ncsi/ncsi-manage.c b/net/ncsi/ncsi-manage.c
index ef017b871857..a26ce5132549 100644
--- a/net/ncsi/ncsi-manage.c
+++ b/net/ncsi/ncsi-manage.c
@@ -132,6 +132,7 @@ static void ncsi_report_link(struct ncsi_dev_priv *ndp, bool force_down)
struct ncsi_dev *nd = &ndp->ndev;
struct ncsi_package *np;
struct ncsi_channel *nc;
+ unsigned long flags;
nd->state = ncsi_dev_state_functional;
if (force_down) {
@@ -142,14 +143,21 @@ static void ncsi_report_link(struct ncsi_dev_priv *ndp, bool force_down)
nd->link_up = 0;
NCSI_FOR_EACH_PACKAGE(ndp, np) {
NCSI_FOR_EACH_CHANNEL(np, nc) {
+ spin_lock_irqsave(&nc->lock, flags);
+
if (!list_empty(&nc->link) ||
- nc->state != NCSI_CHANNEL_ACTIVE)
+ nc->state != NCSI_CHANNEL_ACTIVE) {
+ spin_unlock_irqrestore(&nc->lock, flags);
continue;
+ }
if (nc->modes[NCSI_MODE_LINK].data[2] & 0x1) {
+ spin_unlock_irqrestore(&nc->lock, flags);
nd->link_up = 1;
goto report;
}
+
+ spin_unlock_irqrestore(&nc->lock, flags);
}
}
@@ -163,20 +171,22 @@ static void ncsi_channel_monitor(unsigned long data)
struct ncsi_package *np = nc->package;
struct ncsi_dev_priv *ndp = np->ndp;
struct ncsi_cmd_arg nca;
- bool enabled;
+ bool enabled, chained;
unsigned int timeout;
unsigned long flags;
- int ret;
+ int state, ret;
spin_lock_irqsave(&nc->lock, flags);
+ state = nc->state;
+ chained = !list_empty(&nc->link);
timeout = nc->timeout;
enabled = nc->enabled;
spin_unlock_irqrestore(&nc->lock, flags);
- if (!enabled || !list_empty(&nc->link))
+ if (!enabled || chained)
return;
- if (nc->state != NCSI_CHANNEL_INACTIVE &&
- nc->state != NCSI_CHANNEL_ACTIVE)
+ if (state != NCSI_CHANNEL_INACTIVE &&
+ state != NCSI_CHANNEL_ACTIVE)
return;
if (!(timeout % 2)) {
@@ -195,11 +205,15 @@ static void ncsi_channel_monitor(unsigned long data)
if (timeout + 1 >= 3) {
if (!(ndp->flags & NCSI_DEV_HWA) &&
- nc->state == NCSI_CHANNEL_ACTIVE)
+ state == NCSI_CHANNEL_ACTIVE)
ncsi_report_link(ndp, true);
+ spin_lock_irqsave(&nc->lock, flags);
+ nc->state = NCSI_CHANNEL_INVISIBLE;
+ spin_unlock_irqrestore(&nc->lock, flags);
+
spin_lock_irqsave(&ndp->lock, flags);
- xchg(&nc->state, NCSI_CHANNEL_INACTIVE);
+ nc->state = NCSI_CHANNEL_INACTIVE;
list_add_tail_rcu(&nc->link, &ndp->channel_queue);
spin_unlock_irqrestore(&ndp->lock, flags);
ncsi_process_next_channel(ndp);
@@ -508,6 +522,7 @@ static void ncsi_suspend_channel(struct ncsi_dev_priv *ndp)
struct ncsi_package *np = ndp->active_package;
struct ncsi_channel *nc = ndp->active_channel;
struct ncsi_cmd_arg nca;
+ unsigned long flags;
int ret;
nca.ndp = ndp;
@@ -556,7 +571,9 @@ static void ncsi_suspend_channel(struct ncsi_dev_priv *ndp)
break;
case ncsi_dev_state_suspend_done:
- xchg(&nc->state, NCSI_CHANNEL_INACTIVE);
+ spin_lock_irqsave(&nc->lock, flags);
+ nc->state = NCSI_CHANNEL_INACTIVE;
+ spin_unlock_irqrestore(&nc->lock, flags);
ncsi_process_next_channel(ndp);
break;
@@ -574,6 +591,7 @@ static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
struct ncsi_channel *nc = ndp->active_channel;
struct ncsi_cmd_arg nca;
unsigned char index;
+ unsigned long flags;
int ret;
nca.ndp = ndp;
@@ -675,10 +693,12 @@ static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
goto error;
break;
case ncsi_dev_state_config_done:
+ spin_lock_irqsave(&nc->lock, flags);
if (nc->modes[NCSI_MODE_LINK].data[2] & 0x1)
- xchg(&nc->state, NCSI_CHANNEL_ACTIVE);
+ nc->state = NCSI_CHANNEL_ACTIVE;
else
- xchg(&nc->state, NCSI_CHANNEL_INACTIVE);
+ nc->state = NCSI_CHANNEL_INACTIVE;
+ spin_unlock_irqrestore(&nc->lock, flags);
ncsi_start_channel_monitor(nc);
ncsi_process_next_channel(ndp);
@@ -707,18 +727,25 @@ static int ncsi_choose_active_channel(struct ncsi_dev_priv *ndp)
found = NULL;
NCSI_FOR_EACH_PACKAGE(ndp, np) {
NCSI_FOR_EACH_CHANNEL(np, nc) {
+ spin_lock_irqsave(&nc->lock, flags);
+
if (!list_empty(&nc->link) ||
- nc->state != NCSI_CHANNEL_INACTIVE)
+ nc->state != NCSI_CHANNEL_INACTIVE) {
+ spin_unlock_irqrestore(&nc->lock, flags);
continue;
+ }
if (!found)
found = nc;
ncm = &nc->modes[NCSI_MODE_LINK];
if (ncm->data[2] & 0x1) {
+ spin_unlock_irqrestore(&nc->lock, flags);
found = nc;
goto out;
}
+
+ spin_unlock_irqrestore(&nc->lock, flags);
}
}
@@ -987,11 +1014,14 @@ int ncsi_process_next_channel(struct ncsi_dev_priv *ndp)
goto out;
}
- old_state = xchg(&nc->state, NCSI_CHANNEL_INVISIBLE);
list_del_init(&nc->link);
-
spin_unlock_irqrestore(&ndp->lock, flags);
+ spin_lock_irqsave(&nc->lock, flags);
+ old_state = nc->state;
+ nc->state = NCSI_CHANNEL_INVISIBLE;
+ spin_unlock_irqrestore(&nc->lock, flags);
+
ndp->active_channel = nc;
ndp->active_package = nc->package;
@@ -1006,7 +1036,7 @@ int ncsi_process_next_channel(struct ncsi_dev_priv *ndp)
break;
default:
netdev_err(ndp->ndev.dev, "Invalid state 0x%x on %d:%d\n",
- nc->state, nc->package->id, nc->id);
+ old_state, nc->package->id, nc->id);
ncsi_report_link(ndp, false);
return -EINVAL;
}
@@ -1151,6 +1181,8 @@ int ncsi_start_dev(struct ncsi_dev *nd)
struct ncsi_dev_priv *ndp = TO_NCSI_DEV_PRIV(nd);
struct ncsi_package *np;
struct ncsi_channel *nc;
+ unsigned long flags;
+ bool chained;
int old_state, ret;
if (nd->state != ncsi_dev_state_registered &&
@@ -1166,8 +1198,13 @@ int ncsi_start_dev(struct ncsi_dev *nd)
/* Reset channel's state and start over */
NCSI_FOR_EACH_PACKAGE(ndp, np) {
NCSI_FOR_EACH_CHANNEL(np, nc) {
- old_state = xchg(&nc->state, NCSI_CHANNEL_INACTIVE);
- WARN_ON_ONCE(!list_empty(&nc->link) ||
+ spin_lock_irqsave(&nc->lock, flags);
+ chained = !list_empty(&nc->link);
+ old_state = nc->state;
+ nc->state = NCSI_CHANNEL_INACTIVE;
+ spin_unlock_irqrestore(&nc->lock, flags);
+
+ WARN_ON_ONCE(chained ||
old_state == NCSI_CHANNEL_INVISIBLE);
}
}
generated by cgit (git 2.34.1) at 2024-06-10 15:17:27 +0000