The patch titled
ehea: fix DLPAR memory add support
has been removed from the -mm tree. Its filename was
ehea-fix-dlpar-memory-add-support.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: ehea: fix DLPAR memory add support
From: Thomas Klein <osstklei@xxxxxxxxxx>
Fix two weaknesses in send/receive packet handling which may lead to kernel
panics during DLPAR memory add operations.
Signed-off-by: Thomas Klein <tklein@xxxxxxxxxx>
Cc: Jeff Garzik <jeff@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/net/ehea/ehea.h | 3 ++-
drivers/net/ehea/ehea_main.c | 24 ++++++++++++++++++++++--
2 files changed, 24 insertions(+), 3 deletions(-)
diff -puN drivers/net/ehea/ehea.h~ehea-fix-dlpar-memory-add-support drivers/net/ehea/ehea.h
--- a/drivers/net/ehea/ehea.h~ehea-fix-dlpar-memory-add-support
+++ a/drivers/net/ehea/ehea.h
@@ -40,7 +40,7 @@
#include <asm/io.h>
#define DRV_NAME "ehea"
-#define DRV_VERSION "EHEA_0089"
+#define DRV_VERSION "EHEA_0090"
/* eHEA capability flags */
#define DLPAR_PORT_ADD_REM 1
@@ -371,6 +371,7 @@ struct ehea_port_res {
struct ehea_q_skb_arr rq2_skba;
struct ehea_q_skb_arr rq3_skba;
struct ehea_q_skb_arr sq_skba;
+ int sq_skba_size;
spinlock_t netif_queue;
int queue_stopped;
int swqe_refill_th;
diff -puN drivers/net/ehea/ehea_main.c~ehea-fix-dlpar-memory-add-support drivers/net/ehea/ehea_main.c
--- a/drivers/net/ehea/ehea_main.c~ehea-fix-dlpar-memory-add-support
+++ a/drivers/net/ehea/ehea_main.c
@@ -350,7 +350,8 @@ static void ehea_refill_rq1(struct ehea_
pr->rq1_skba.os_skbs = 0;
if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
- pr->rq1_skba.index = index;
+ if (nr_of_wqes > 0)
+ pr->rq1_skba.index = index;
pr->rq1_skba.os_skbs = fill_wqes;
return;
}
@@ -1465,7 +1466,9 @@ static int ehea_init_port_res(struct ehe
init_attr->act_nr_rwqes_rq2,
init_attr->act_nr_rwqes_rq3);
- ret = ehea_init_q_skba(&pr->sq_skba, init_attr->act_nr_send_wqes + 1);
+ pr->sq_skba_size = init_attr->act_nr_send_wqes + 1;
+
+ ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size);
ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1);
ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1);
ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1);
@@ -2622,6 +2625,22 @@ void ehea_purge_sq(struct ehea_qp *orig_
}
}
+void ehea_flush_sq(struct ehea_port *port)
+{
+ int i;
+
+ for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
+ struct ehea_port_res *pr = &port->port_res[i];
+ int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
+ int k = 0;
+ while (atomic_read(&pr->swqe_avail) < swqe_max) {
+ msleep(5);
+ if (++k == 20)
+ break;
+ }
+ }
+}
+
int ehea_stop_qps(struct net_device *dev)
{
struct ehea_port *port = netdev_priv(dev);
@@ -2849,6 +2868,7 @@ static void ehea_rereg_mrs(struct work_s
if (dev->flags & IFF_UP) {
mutex_lock(&port->port_lock);
netif_stop_queue(dev);
+ ehea_flush_sq(port);
ret = ehea_stop_qps(dev);
if (ret) {
mutex_unlock(&port->port_lock);
_
Patches currently in -mm which might be from osstklei@xxxxxxxxxx are
origin.patch
ehea-fix-dlpar-memory-add-support-fix.patch
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