git: daa150aaa30f - main - Properly handle case where firmware dump returns more registers on second pass in mlx5core.
Hans Petter Selasky
hselasky at FreeBSD.org
Fri Jan 8 11:36:53 UTC 2021
The branch main has been updated by hselasky:
URL: https://cgit.FreeBSD.org/src/commit/?id=daa150aaa30fad8187da8bcbce0880c5075fdda7
commit daa150aaa30fad8187da8bcbce0880c5075fdda7
Author: Hans Petter Selasky <hselasky at FreeBSD.org>
AuthorDate: 2021-01-08 10:52:44 +0000
Commit: Hans Petter Selasky <hselasky at FreeBSD.org>
CommitDate: 2021-01-08 11:35:54 +0000
Properly handle case where firmware dump returns more registers on second pass
in mlx5core.
Submitted by: kib@
MFC after: 1 week
Sponsored by: Mellanox Technologies // NVIDIA Networking
---
sys/dev/mlx5/mlx5_core/mlx5_fwdump.c | 24 ++++++++++++++++++------
1 file changed, 18 insertions(+), 6 deletions(-)
diff --git a/sys/dev/mlx5/mlx5_core/mlx5_fwdump.c b/sys/dev/mlx5/mlx5_core/mlx5_fwdump.c
index d633333cb80d..09e8f9f7660a 100644
--- a/sys/dev/mlx5/mlx5_core/mlx5_fwdump.c
+++ b/sys/dev/mlx5/mlx5_core/mlx5_fwdump.c
@@ -115,11 +115,15 @@ mlx5_fwdump_prep(struct mlx5_core_dev *mdev)
mlx5_core_warn(mdev, "no output from scan space\n");
goto unlock_vsc;
}
- mdev->dump_rege = malloc(sz * sizeof(struct mlx5_crspace_regmap),
+
+ /*
+ * We add a sentinel element at the end of the array to
+ * terminate the read loop in mlx5_fwdump(), so allocate sz + 1.
+ */
+ mdev->dump_rege = malloc((sz + 1) * sizeof(struct mlx5_crspace_regmap),
M_MLX5_DUMP, M_WAITOK | M_ZERO);
for (i = 0, addr = 0;;) {
- MPASS(i < sz);
mdev->dump_rege[i].cnt++;
MLX5_VSC_SET(vsc_addr, &in, address, addr);
pci_write_config(dev, vsc_addr + MLX5_VSC_ADDR_OFFSET, in, 4);
@@ -137,13 +141,21 @@ mlx5_fwdump_prep(struct mlx5_core_dev *mdev)
next_addr = MLX5_VSC_GET(vsc_addr, &out, address);
if (next_addr == 0 || next_addr == addr)
break;
- if (next_addr != addr + 4)
- mdev->dump_rege[++i].addr = next_addr;
+ if (next_addr != addr + 4) {
+ if (++i == sz) {
+ mlx5_core_err(mdev,
+ "Inconsistent hw crspace reads (1): sz %u i %u addr %#lx",
+ sz, i, (unsigned long)addr);
+ break;
+ }
+ mdev->dump_rege[i].addr = next_addr;
+ }
addr = next_addr;
}
- if (i + 1 != sz) {
+ /* i == sz case already reported by loop above */
+ if (i + 1 != sz && i != sz) {
mlx5_core_err(mdev,
- "Inconsistent hw crspace reads: sz %u i %u addr %#lx",
+ "Inconsistent hw crspace reads (2): sz %u i %u addr %#lx",
sz, i, (unsigned long)addr);
}
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