linux-kernel - [PATCH 2/3] dma-pool: don't return errors from dma_atomic_pool

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220817060647.1032426-3-hch@lst.de>
Date:   Wed, 17 Aug 2022 08:06:46 +0200
From:   Christoph Hellwig <hch@....de>
To:     iommu@...ts.linux.dev, Marek Szyprowski <m.szyprowski@...sung.com>,
        Robin Murphy <robin.murphy@....com>
Cc:     Michal Hocko <mhocko@...e.com>,
        David Rientjes <rientjes@...gle.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] dma-pool: don't return errors from dma_atomic_pool_init

Returning errors from initcalls does not change a thing, thus don't
bother with returning -ENOMEM if one of the pool allocations failed.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 kernel/dma/pool.c | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/kernel/dma/pool.c b/kernel/dma/pool.c
index 56f96678934bf..5b07b0379a501 100644
--- a/kernel/dma/pool.c
+++ b/kernel/dma/pool.c
@@ -195,8 +195,6 @@ static unsigned long calculate_pool_size(unsigned long zone_pages)
 
 static int __init dma_atomic_pool_init(void)
 {
-	int ret = 0;
-
 	/*
 	 * If coherent_pool was not used on the command line, default the pool
 	 * sizes to 128KB per 1GB of memory, min 128KB, max MAX_ORDER-1.
@@ -208,23 +206,17 @@ static int __init dma_atomic_pool_init(void)
 
 	atomic_pool_kernel = __dma_atomic_pool_init(atomic_pool_size,
 						    GFP_KERNEL);
-	if (!atomic_pool_kernel)
-		ret = -ENOMEM;
 	if (has_managed_dma()) {
 		atomic_pool_dma = __dma_atomic_pool_init(atomic_pool_size,
 						GFP_KERNEL | GFP_DMA);
-		if (!atomic_pool_dma)
-			ret = -ENOMEM;
 	}
 	if (IS_ENABLED(CONFIG_ZONE_DMA32)) {
 		atomic_pool_dma32 = __dma_atomic_pool_init(atomic_pool_size,
 						GFP_KERNEL | GFP_DMA32);
-		if (!atomic_pool_dma32)
-			ret = -ENOMEM;
 	}
 
 	dma_atomic_pool_debugfs_init();
-	return ret;
+	return 0;
 }
 postcore_initcall(dma_atomic_pool_init);
 
-- 
2.30.2