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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 v2 2/5] cxl/region: Scan all partitions for unmapped poison
Date: Thu,  2 Jul 2026 17:08:46 +0800	[thread overview]
Message-ID: <20260702090849.47501-3-icheng@nvidia.com> (raw)
In-Reply-To: <20260702090849.47501-1-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>
Tested-by: Alison Schofield <alison.schofield@intel.com>
Signed-off-by: Richard Cheng <icheng@nvidia.com>
---
Changelog:

v1->v2:
    - Tweak commit message
---
 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


  parent reply	other threads:[~2026-07-02  9:09 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-07-02  9:08 [PATCH v2 0/5] cxl: Sashiko bug fixes Richard Cheng
2026-07-02  9:08 ` [PATCH v2 1/5] cxl/features: Reject feature offset that overflows 16-bit field Richard Cheng
2026-07-02 11:22   ` sashiko-bot
2026-07-02  9:08 ` Richard Cheng [this message]
2026-07-02  9:08 ` [PATCH v2 3/5] cxl/region: Don't leak tolerated RAM -EFAULT from unmapped poison scan Richard Cheng
2026-07-02  9:20   ` sashiko-bot
2026-07-02  9:08 ` [PATCH v2 4/5] cxl/region: Start unmapped poison scan at the committed decoder boundary Richard Cheng
2026-07-02  9:08 ` [PATCH v2 5/5] cxl/memdev: Don't overwrite the error from an earlier partition poison query Richard Cheng

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