From: Richard Cheng <icheng@nvidia.com>
To: dave@stgolabs.net, jic23@kernel.org, dave.jiang@intel.com,
alison.schofield@intel.com, vishal.l.verma@intel.com,
djbw@kernel.org, danwilliams@nvidia.com
Cc: iweiny@kernel.org, ming.li@zohomail.com, gourry@gourry.net,
rrichter@amd.com, linux-cxl@vger.kernel.org,
linux-kernel@vger.kernel.org, kees@kernel.org,
newtonl@nvidia.com, kristinc@nvidia.com, mochs@nvidia.com,
kaihengf@nvidia.com, kobak@nvidia.com,
Richard Cheng <icheng@nvidia.com>
Subject: [PATCH 2/3] cxl/region: Scan all partitions for unmapped poison
Date: Tue, 30 Jun 2026 15:46:56 +0800 [thread overview]
Message-ID: <20260630074657.43077-3-icheng@nvidia.com> (raw)
In-Reply-To: <20260630074657.43077-1-icheng@nvidia.com>
cxl_get_poison_unmapped() sweeps the unmapped tail of each partition
from ctx->part onward. A fully-mapped partition has no unmapped tail
, it's a normal per-partition state, but the loop treated it with break,
aborting the whole sweep and silently skipping unmapped poison in all
later partition. Use continue so a fully-mapped partition is skipped and
later partitions are still scanned.
Fixes: be5cbd0840275 ("cxl: Kill enum cxl_decoder_mode")
Signed-off-by: Richard Cheng <icheng@nvidia.com>
---
drivers/cxl/core/region.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c
index 1e211542b6b6..be246fb09c99 100644
--- a/drivers/cxl/core/region.c
+++ b/drivers/cxl/core/region.c
@@ -2931,7 +2931,7 @@ static int cxl_get_poison_unmapped(struct cxl_memdev *cxlmd,
offset = res->start;
length = res->end - offset + 1;
if (!length)
- break;
+ continue;
rc = cxl_mem_get_poison(cxlmd, offset, length, NULL);
if (rc == -EFAULT && cxlds->part[i].mode == CXL_PARTMODE_RAM)
continue;
--
2.43.0
next prev parent reply other threads:[~2026-06-30 7:47 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-30 7:46 [PATCH 0/3] cxl: Sashiko bug fixes Richard Cheng
2026-06-30 7:46 ` [PATCH 1/3] cxl/features: Reject feature offset that overflows 16-bit field Richard Cheng
2026-06-30 15:54 ` Dave Jiang
2026-06-30 7:46 ` Richard Cheng [this message]
2026-06-30 15:56 ` [PATCH 2/3] cxl/region: Scan all partitions for unmapped poison Dave Jiang
2026-07-01 4:48 ` Alison Schofield
2026-06-30 7:46 ` [PATCH 3/3] cxl/region: Don't leak tolerated RAM -EFAULT from unmapped poison scan Richard Cheng
2026-06-30 16:04 ` Dave Jiang
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