From: <abhimanyu.saini@xilinx.com>
To: <dev@dpdk.org>
Cc: <chenbo.xia@intel.com>, <maxime.coquelin@redhat.com>,
<andrew.rybchenko@oktetlabs.ru>,
Abhimanyu Saini <absaini@amd.com>, <stable@dpdk.org>
Subject: [PATCH v2 1/5] common/sfc_efx/base: remove VQ index check during VQ start
Date: Thu, 14 Jul 2022 14:14:47 +0530 [thread overview]
Message-ID: <20220714084451.38375-2-asaini@xilinx.com> (raw)
In-Reply-To: <20220714084451.38375-1-asaini@xilinx.com>
From: Abhimanyu Saini <absaini@amd.com>
The used/avail queue indexes are not bound by queue
size, because HW calculates descriptor entry index by
performing a simple modulo between queue index and queue_size.
So, do not check initial used and avail queue indexes
against queue size because it is possible for these
indexes to be greater than queue size in the
following cases:
1) The queue is created to be migrated into, or
2) The client issues a qstop/qstart after running datapath
Fixes: 4dda72dbdeab3 ("common/sfc_efx/base: add base virtio support for vDPA")
Cc: stable@dpdk.org
Signed-off-by: Abhimanyu Saini <absaini@amd.com>
---
v2:
* Fix checkpatch warnings
* Add a cover letter
drivers/common/sfc_efx/base/rhead_virtio.c | 12 +-----------
1 file changed, 1 insertion(+), 11 deletions(-)
diff --git a/drivers/common/sfc_efx/base/rhead_virtio.c b/drivers/common/sfc_efx/base/rhead_virtio.c
index 335cb747d1..7f087170fe 100644
--- a/drivers/common/sfc_efx/base/rhead_virtio.c
+++ b/drivers/common/sfc_efx/base/rhead_virtio.c
@@ -47,14 +47,6 @@ rhead_virtio_qstart(
goto fail2;
}
- if (evvdp != NULL) {
- if ((evvdp->evvd_vq_cidx > evvcp->evvc_vq_size) ||
- (evvdp->evvd_vq_pidx > evvcp->evvc_vq_size)) {
- rc = EINVAL;
- goto fail3;
- }
- }
-
req.emr_cmd = MC_CMD_VIRTIO_INIT_QUEUE;
req.emr_in_buf = payload;
req.emr_in_length = MC_CMD_VIRTIO_INIT_QUEUE_REQ_LEN;
@@ -116,15 +108,13 @@ rhead_virtio_qstart(
if (req.emr_rc != 0) {
rc = req.emr_rc;
- goto fail4;
+ goto fail3;
}
evvp->evv_vi_index = vi_index;
return (0);
-fail4:
- EFSYS_PROBE(fail4);
fail3:
EFSYS_PROBE(fail3);
fail2:
--
2.18.2
parent reply other threads:[~2022-07-14 8:45 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <20220714084451.38375-1-asaini@xilinx.com>]
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