From: Jiri Pirko <jiri@nvidia.com>
Date: Mon, 9 Feb 2026 15:38:05 +0000 (+0100)
Subject: dma-mapping: avoid random addr value print out on error path
X-Git-Tag: ceph-for-7.0-rc4~91^2~1
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=47322c469d4a63ac45b705ca83680671ff71c975;p=ceph-client.git

dma-mapping: avoid random addr value print out on error path

dma_addr is unitialized in dma_direct_map_phys() when swiotlb is forced
and DMA_ATTR_MMIO is set which leads to random value print out in
warning. Fix that by just returning DMA_MAPPING_ERROR.

Fixes: e53d29f957b3 ("dma-mapping: convert dma_direct_*map_page to be phys_addr_t based")
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20260209153809.250835-2-jiri@resnulli.us
---

diff --git a/kernel/dma/direct.h b/kernel/dma/direct.h
index f476c63b668c..e89f175e9c2d 100644
--- a/kernel/dma/direct.h
+++ b/kernel/dma/direct.h
@@ -85,7 +85,7 @@ static inline dma_addr_t dma_direct_map_phys(struct device *dev,
 
 	if (is_swiotlb_force_bounce(dev)) {
 		if (attrs & DMA_ATTR_MMIO)
-			goto err_overflow;
+			return DMA_MAPPING_ERROR;
 
 		return swiotlb_map(dev, phys, size, dir, attrs);
 	}