5.15-stable review patch. If anyone has any objections, please let me know.
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From: Michael Margolin mrgolin@amazon.com
[ Upstream commit 2d0e7ba468eae365f3c4bc9266679e1f8dd405f0 ]
Do not try to handle admin command completion if it has an unexpected command id and print a relevant error message.
Reviewed-by: Firas Jahjah firasj@amazon.com Reviewed-by: Yehuda Yitschak yehuday@amazon.com Signed-off-by: Michael Margolin mrgolin@amazon.com Link: https://lore.kernel.org/r/20240513064630.6247-1-mrgolin@amazon.com Reviewed-by: Gal Pressman gal.pressman@linux.dev Signed-off-by: Leon Romanovsky leon@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/infiniband/hw/efa/efa_com.c | 30 ++++++++++++++++------------- 1 file changed, 17 insertions(+), 13 deletions(-)
diff --git a/drivers/infiniband/hw/efa/efa_com.c b/drivers/infiniband/hw/efa/efa_com.c index 0d523ad736c7..462908022091 100644 --- a/drivers/infiniband/hw/efa/efa_com.c +++ b/drivers/infiniband/hw/efa/efa_com.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause /* - * Copyright 2018-2021 Amazon.com, Inc. or its affiliates. All rights reserved. + * Copyright 2018-2024 Amazon.com, Inc. or its affiliates. All rights reserved. */
#include "efa_com.h" @@ -398,8 +398,8 @@ static struct efa_comp_ctx *efa_com_submit_admin_cmd(struct efa_com_admin_queue return comp_ctx; }
-static void efa_com_handle_single_admin_completion(struct efa_com_admin_queue *aq, - struct efa_admin_acq_entry *cqe) +static int efa_com_handle_single_admin_completion(struct efa_com_admin_queue *aq, + struct efa_admin_acq_entry *cqe) { struct efa_comp_ctx *comp_ctx; u16 cmd_id; @@ -408,11 +408,11 @@ static void efa_com_handle_single_admin_completion(struct efa_com_admin_queue *a EFA_ADMIN_ACQ_COMMON_DESC_COMMAND_ID);
comp_ctx = efa_com_get_comp_ctx(aq, cmd_id, false); - if (!comp_ctx) { + if (comp_ctx->status != EFA_CMD_SUBMITTED) { ibdev_err(aq->efa_dev, - "comp_ctx is NULL. Changing the admin queue running state\n"); - clear_bit(EFA_AQ_STATE_RUNNING_BIT, &aq->state); - return; + "Received completion with unexpected command id[%d], sq producer: %d, sq consumer: %d, cq consumer: %d\n", + cmd_id, aq->sq.pc, aq->sq.cc, aq->cq.cc); + return -EINVAL; }
comp_ctx->status = EFA_CMD_COMPLETED; @@ -420,14 +420,17 @@ static void efa_com_handle_single_admin_completion(struct efa_com_admin_queue *a
if (!test_bit(EFA_AQ_STATE_POLLING_BIT, &aq->state)) complete(&comp_ctx->wait_event); + + return 0; }
static void efa_com_handle_admin_completion(struct efa_com_admin_queue *aq) { struct efa_admin_acq_entry *cqe; u16 queue_size_mask; - u16 comp_num = 0; + u16 comp_cmds = 0; u8 phase; + int err; u16 ci;
queue_size_mask = aq->depth - 1; @@ -445,10 +448,12 @@ static void efa_com_handle_admin_completion(struct efa_com_admin_queue *aq) * phase bit was validated */ dma_rmb(); - efa_com_handle_single_admin_completion(aq, cqe); + err = efa_com_handle_single_admin_completion(aq, cqe); + if (!err) + comp_cmds++;
+ aq->cq.cc++; ci++; - comp_num++; if (ci == aq->depth) { ci = 0; phase = !phase; @@ -457,10 +462,9 @@ static void efa_com_handle_admin_completion(struct efa_com_admin_queue *aq) cqe = &aq->cq.entries[ci]; }
- aq->cq.cc += comp_num; aq->cq.phase = phase; - aq->sq.cc += comp_num; - atomic64_add(comp_num, &aq->stats.completed_cmd); + aq->sq.cc += comp_cmds; + atomic64_add(comp_cmds, &aq->stats.completed_cmd); }
static int efa_com_comp_status_to_errno(u8 comp_status)