This is a note to let you know that I've just added the patch titled
s390/qeth: don't keep track of Input Queue count
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
s390-qeth-don-t-keep-track-of-input-queue-count.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit bce7b0f8387db6b603f8ad1c187520f86bde5d44
Author: Julian Wiedmann <jwi@xxxxxxxxxxxxx>
Date: Mon Oct 25 11:56:54 2021 +0200
s390/qeth: don't keep track of Input Queue count
[ Upstream commit dc15012bb083c70502b625cf56fbf32b6cf17fe4 ]
The only actual user of qdio.no_input_queues is qeth_qdio_establish(),
and there we already have full awareness of the current Input Queue
configuration (1 RX queue, plus potentially 1 TX Completion queue).
So avoid this state tracking, and the ambiguity it brings with it.
Signed-off-by: Julian Wiedmann <jwi@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Stable-dep-of: 8a2e4d37afb8 ("s390/qeth: Fix kernel panic after setting hsuid")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h
index e8c360879883b..71464e9ad4f82 100644
--- a/drivers/s390/net/qeth_core.h
+++ b/drivers/s390/net/qeth_core.h
@@ -545,7 +545,6 @@ static inline bool qeth_out_queue_is_empty(struct qeth_qdio_out_q *queue)
struct qeth_qdio_info {
atomic_t state;
/* input */
- int no_in_queues;
struct qeth_qdio_q *in_q;
struct qeth_qdio_q *c_q;
struct qeth_qdio_buffer_pool in_buf_pool;
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index c1346c4e2242d..9b7f518395e16 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -354,8 +354,8 @@ static int qeth_cq_init(struct qeth_card *card)
qdio_reset_buffers(card->qdio.c_q->qdio_bufs,
QDIO_MAX_BUFFERS_PER_Q);
card->qdio.c_q->next_buf_to_init = 127;
- rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT,
- card->qdio.no_in_queues - 1, 0, 127, NULL);
+ rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 1, 0, 127,
+ NULL);
if (rc) {
QETH_CARD_TEXT_(card, 2, "1err%d", rc);
goto out;
@@ -375,21 +375,16 @@ static int qeth_alloc_cq(struct qeth_card *card)
dev_err(&card->gdev->dev, "Failed to create completion queue\n");
return -ENOMEM;
}
-
- card->qdio.no_in_queues = 2;
} else {
QETH_CARD_TEXT(card, 2, "nocq");
card->qdio.c_q = NULL;
- card->qdio.no_in_queues = 1;
}
- QETH_CARD_TEXT_(card, 2, "iqc%d", card->qdio.no_in_queues);
return 0;
}
static void qeth_free_cq(struct qeth_card *card)
{
if (card->qdio.c_q) {
- --card->qdio.no_in_queues;
qeth_free_qdio_queue(card->qdio.c_q);
card->qdio.c_q = NULL;
}
@@ -1492,7 +1487,6 @@ static void qeth_init_qdio_info(struct qeth_card *card)
card->qdio.default_out_queue = QETH_DEFAULT_QUEUE;
/* inbound */
- card->qdio.no_in_queues = 1;
card->qdio.in_buf_size = QETH_IN_BUF_SIZE_DEFAULT;
if (IS_IQD(card))
card->qdio.init_pool.buf_count = QETH_IN_BUF_COUNT_HSDEFAULT;
@@ -5173,6 +5167,7 @@ static int qeth_qdio_establish(struct qeth_card *card)
struct qdio_buffer **in_sbal_ptrs[QETH_MAX_IN_QUEUES];
struct qeth_qib_parms *qib_parms = NULL;
struct qdio_initialize init_data;
+ unsigned int no_input_qs = 1;
unsigned int i;
int rc = 0;
@@ -5187,8 +5182,10 @@ static int qeth_qdio_establish(struct qeth_card *card)
}
in_sbal_ptrs[0] = card->qdio.in_q->qdio_bufs;
- if (card->options.cq == QETH_CQ_ENABLED)
+ if (card->options.cq == QETH_CQ_ENABLED) {
in_sbal_ptrs[1] = card->qdio.c_q->qdio_bufs;
+ no_input_qs++;
+ }
for (i = 0; i < card->qdio.no_out_queues; i++)
out_sbal_ptrs[i] = card->qdio.out_qs[i]->qdio_bufs;
@@ -5198,7 +5195,7 @@ static int qeth_qdio_establish(struct qeth_card *card)
QDIO_QETH_QFMT;
init_data.qib_param_field_format = 0;
init_data.qib_param_field = (void *)qib_parms;
- init_data.no_input_qs = card->qdio.no_in_queues;
+ init_data.no_input_qs = no_input_qs;
init_data.no_output_qs = card->qdio.no_out_queues;
init_data.input_handler = qeth_qdio_input_handler;
init_data.output_handler = qeth_qdio_output_handler;
