4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Doron Tsur <doront@xxxxxxxxxxxx>
[ Upstream commit 0b6e26ce89391327d955a756a7823272238eb867 ]
With several ConnectX-4 cards installed on a server, one may receive
irqn > 255 from the kernel API, which we mistakenly trim to 8bit.
This causes EQ creation failure with the following stack trace:
[<ffffffff812a11f4>] dump_stack+0x48/0x64
[<ffffffff810ace21>] __setup_irq+0x3a1/0x4f0
[<ffffffff810ad7e0>] request_threaded_irq+0x120/0x180
[<ffffffffa0923660>] ? mlx5_eq_int+0x450/0x450 [mlx5_core]
[<ffffffffa0922f64>] mlx5_create_map_eq+0x1e4/0x2b0 [mlx5_core]
[<ffffffffa091de01>] alloc_comp_eqs+0xb1/0x180 [mlx5_core]
[<ffffffffa091ea99>] mlx5_dev_init+0x5e9/0x6e0 [mlx5_core]
[<ffffffffa091ec29>] init_one+0x99/0x1c0 [mlx5_core]
[<ffffffff812e2afc>] local_pci_probe+0x4c/0xa0
Fixing it by changing of the irqn type from u8 to unsigned int to
support values > 255
Fixes: 61d0e73e0a5a ('net/mlx5_core: Use the the real irqn in eq->irqn')
Reported-by: Jiri Pirko <jiri@xxxxxxxxxxxx>
Signed-off-by: Doron Tsur <doront@xxxxxxxxxxxx>
Signed-off-by: Matan Barak <matanb@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/infiniband/hw/mlx5/cq.c | 2 +-
drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 6 +++---
drivers/net/ethernet/mellanox/mlx5/core/main.c | 3 ++-
include/linux/mlx5/cq.h | 2 +-
include/linux/mlx5/driver.h | 5 +++--
5 files changed, 10 insertions(+), 8 deletions(-)
--- a/drivers/infiniband/hw/mlx5/cq.c
+++ b/drivers/infiniband/hw/mlx5/cq.c
@@ -756,7 +756,7 @@ struct ib_cq *mlx5_ib_create_cq(struct i
int uninitialized_var(index);
int uninitialized_var(inlen);
int cqe_size;
- int irqn;
+ unsigned int irqn;
int eqn;
int err;
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -746,7 +746,7 @@ static int mlx5e_create_cq(struct mlx5e_
struct mlx5_core_dev *mdev = priv->mdev;
struct mlx5_core_cq *mcq = &cq->mcq;
int eqn_not_used;
- int irqn;
+ unsigned int irqn;
int err;
u32 i;
@@ -800,7 +800,7 @@ static int mlx5e_enable_cq(struct mlx5e_
void *in;
void *cqc;
int inlen;
- int irqn_not_used;
+ unsigned int irqn_not_used;
int eqn;
int err;
@@ -1504,7 +1504,7 @@ static int mlx5e_create_drop_cq(struct m
struct mlx5_core_dev *mdev = priv->mdev;
struct mlx5_core_cq *mcq = &cq->mcq;
int eqn_not_used;
- int irqn;
+ unsigned int irqn;
int err;
err = mlx5_cqwq_create(mdev, ¶m->wq, param->cqc, &cq->wq,
--- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
@@ -568,7 +568,8 @@ static void mlx5_irq_clear_affinity_hint
mlx5_irq_clear_affinity_hint(mdev, i);
}
-int mlx5_vector2eqn(struct mlx5_core_dev *dev, int vector, int *eqn, int *irqn)
+int mlx5_vector2eqn(struct mlx5_core_dev *dev, int vector, int *eqn,
+ unsigned int *irqn)
{
struct mlx5_eq_table *table = &dev->priv.eq_table;
struct mlx5_eq *eq, *n;
--- a/include/linux/mlx5/cq.h
+++ b/include/linux/mlx5/cq.h
@@ -45,7 +45,7 @@ struct mlx5_core_cq {
atomic_t refcount;
struct completion free;
unsigned vector;
- int irqn;
+ unsigned int irqn;
void (*comp) (struct mlx5_core_cq *);
void (*event) (struct mlx5_core_cq *, enum mlx5_event);
struct mlx5_uar *uar;
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -303,7 +303,7 @@ struct mlx5_eq {
u32 cons_index;
struct mlx5_buf buf;
int size;
- u8 irqn;
+ unsigned int irqn;
u8 eqn;
int nent;
u64 mask;
@@ -762,7 +762,8 @@ int mlx5_create_map_eq(struct mlx5_core_
int mlx5_destroy_unmap_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq);
int mlx5_start_eqs(struct mlx5_core_dev *dev);
int mlx5_stop_eqs(struct mlx5_core_dev *dev);
-int mlx5_vector2eqn(struct mlx5_core_dev *dev, int vector, int *eqn, int *irqn);
+int mlx5_vector2eqn(struct mlx5_core_dev *dev, int vector, int *eqn,
+ unsigned int *irqn);
int mlx5_core_attach_mcg(struct mlx5_core_dev *dev, union ib_gid *mgid, u32 qpn);
int mlx5_core_detach_mcg(struct mlx5_core_dev *dev, union ib_gid *mgid, u32 qpn);
--
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