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From: Richard Cheng <icheng@nvidia.com>
To: jic23@kernel.org, dave@stgolabs.net, dave.jiang@intel.com,
	alison.schofield@intel.com, vishal.l.verma@intel.com
Cc: iweiny@kernel.org, ming.li@zohomail.com, kaihengf@nvidia.com,
	kobak@nvidia.com, newtonl@nvidia.com, kristinc@nvidia.com,
	linux-cxl@vger.kernel.org, linux-kernel@vger.kernel.org,
	Richard Cheng <icheng@nvidia.com>,
	Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
Subject: [PATCH v8 1/4] cxl/region: Scan all partitions for unmapped poison
Date: Tue, 22 Sep 2026 18:11:26 +0800	[thread overview]
Message-ID: <20260922101129.52794-2-icheng@nvidia.com> (raw)
In-Reply-To: <20260922101129.52794-1-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")
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
Tested-by: Alison Schofield <alison.schofield@intel.com>
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 5ef0ca0694ff..7c7287315d72 100644
--- a/drivers/cxl/core/region.c
+++ b/drivers/cxl/core/region.c
@@ -2952,7 +2952,7 @@ 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 (poison_efault_forgiven(rc, cxlds->part[i].mode))
 			continue;
-- 
2.43.0


  reply	other threads:[~2026-09-22 10:12 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-22 10:11 [PATCH v8 0/4] cxl: Repair poison enumeration regressions Richard Cheng
2026-09-22 10:11 ` Richard Cheng [this message]
2026-09-22 10:11 ` [PATCH v8 2/4] cxl/region: Don't leak tolerated RAM -EFAULT from unmapped poison scan Richard Cheng
2026-09-22 10:11 ` [PATCH v8 3/4] cxl/region: Start unmapped poison scan at the committed decoder boundary Richard Cheng
2026-09-22 10:11 ` [PATCH v8 4/4] cxl/memdev: Don't overwrite the error from an earlier partition poison query Richard Cheng

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