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

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Message-Id: <20220822061255.151688-3-hch@lst.de>
Date:   Mon, 22 Aug 2022 08:12:54 +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>
Reviewed-by: Robin Murphy <robin.murphy@....com>
---
 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 37008d4f6d7af..4b4c59d05e436 100644
--- a/kernel/dma/pool.c
+++ b/kernel/dma/pool.c
@@ -194,8 +194,6 @@ static size_t 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.
@@ -207,23 +205,17 @@ 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