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authorMaher Sanalla <msanalla@nvidia.com>2022-01-13 16:48:48 +0300
committerSaeed Mahameed <saeedm@nvidia.com>2022-02-02 07:59:40 +0300
commit3c5193a87b0fea090aa3f769d020337662d87b5e (patch)
tree3935c4595a34c11284ec520f77d8459a761c57bd /drivers/net/ethernet
parent4a08a131351e375a2969b98e46df260ed04dcba7 (diff)
downloadlinux-3c5193a87b0fea090aa3f769d020337662d87b5e.tar.xz
net/mlx5: Use del_timer_sync in fw reset flow of halting poll
Substitute del_timer() with del_timer_sync() in fw reset polling deactivation flow, in order to prevent a race condition which occurs when del_timer() is called and timer is deactivated while another process is handling the timer interrupt. A situation that led to the following call trace: RIP: 0010:run_timer_softirq+0x137/0x420 <IRQ> recalibrate_cpu_khz+0x10/0x10 ktime_get+0x3e/0xa0 ? sched_clock_cpu+0xb/0xc0 __do_softirq+0xf5/0x2ea irq_exit_rcu+0xc1/0xf0 sysvec_apic_timer_interrupt+0x9e/0xc0 asm_sysvec_apic_timer_interrupt+0x12/0x20 </IRQ> Fixes: 38b9f903f22b ("net/mlx5: Handle sync reset request event") Signed-off-by: Maher Sanalla <msanalla@nvidia.com> Reviewed-by: Moshe Shemesh <moshe@nvidia.com> Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Diffstat (limited to 'drivers/net/ethernet')
-rw-r--r--drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c b/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c
index 0b0234f9d694..84dbe46d5ede 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c
@@ -132,7 +132,7 @@ static void mlx5_stop_sync_reset_poll(struct mlx5_core_dev *dev)
{
struct mlx5_fw_reset *fw_reset = dev->priv.fw_reset;
- del_timer(&fw_reset->timer);
+ del_timer_sync(&fw_reset->timer);
}
static void mlx5_sync_reset_clear_reset_requested(struct mlx5_core_dev *dev, bool poll_health)