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path: root/drivers/net/ethernet/mellanox/mlx4/cmd.c
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Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx4/cmd.c')
-rw-r--r--drivers/net/ethernet/mellanox/mlx4/cmd.c49
1 files changed, 47 insertions, 2 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/cmd.c b/drivers/net/ethernet/mellanox/mlx4/cmd.c
index 7e94987d030..c8fef435302 100644
--- a/drivers/net/ethernet/mellanox/mlx4/cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx4/cmd.c
@@ -296,7 +296,12 @@ int mlx4_comm_cmd(struct mlx4_dev *dev, u8 cmd, u16 param,
static int cmd_pending(struct mlx4_dev *dev)
{
- u32 status = readl(mlx4_priv(dev)->cmd.hcr + HCR_STATUS_OFFSET);
+ u32 status;
+
+ if (pci_channel_offline(dev->pdev))
+ return -EIO;
+
+ status = readl(mlx4_priv(dev)->cmd.hcr + HCR_STATUS_OFFSET);
return (status & swab32(1 << HCR_GO_BIT)) ||
(mlx4_priv(dev)->cmd.toggle ==
@@ -314,11 +319,29 @@ static int mlx4_cmd_post(struct mlx4_dev *dev, u64 in_param, u64 out_param,
mutex_lock(&cmd->hcr_mutex);
+ if (pci_channel_offline(dev->pdev)) {
+ /*
+ * Device is going through error recovery
+ * and cannot accept commands.
+ */
+ ret = -EIO;
+ goto out;
+ }
+
end = jiffies;
if (event)
end += msecs_to_jiffies(GO_BIT_TIMEOUT_MSECS);
while (cmd_pending(dev)) {
+ if (pci_channel_offline(dev->pdev)) {
+ /*
+ * Device is going through error recovery
+ * and cannot accept commands.
+ */
+ ret = -EIO;
+ goto out;
+ }
+
if (time_after_eq(jiffies, end)) {
mlx4_err(dev, "%s:cmd_pending failed\n", __func__);
goto out;
@@ -431,14 +454,33 @@ static int mlx4_cmd_poll(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
down(&priv->cmd.poll_sem);
+ if (pci_channel_offline(dev->pdev)) {
+ /*
+ * Device is going through error recovery
+ * and cannot accept commands.
+ */
+ err = -EIO;
+ goto out;
+ }
+
err = mlx4_cmd_post(dev, in_param, out_param ? *out_param : 0,
in_modifier, op_modifier, op, CMD_POLL_TOKEN, 0);
if (err)
goto out;
end = msecs_to_jiffies(timeout) + jiffies;
- while (cmd_pending(dev) && time_before(jiffies, end))
+ while (cmd_pending(dev) && time_before(jiffies, end)) {
+ if (pci_channel_offline(dev->pdev)) {
+ /*
+ * Device is going through error recovery
+ * and cannot accept commands.
+ */
+ err = -EIO;
+ goto out;
+ }
+
cond_resched();
+ }
if (cmd_pending(dev)) {
err = -ETIMEDOUT;
@@ -532,6 +574,9 @@ int __mlx4_cmd(struct mlx4_dev *dev, u64 in_param, u64 *out_param,
int out_is_imm, u32 in_modifier, u8 op_modifier,
u16 op, unsigned long timeout, int native)
{
+ if (pci_channel_offline(dev->pdev))
+ return -EIO;
+
if (!mlx4_is_mfunc(dev) || (native && mlx4_is_master(dev))) {
if (mlx4_priv(dev)->cmd.use_events)
return mlx4_cmd_wait(dev, in_param, out_param,