From: Sergei Trofimovich <slyfox@gentoo.org>
To: Andrew Morton <akpm@linux-foundation.org>, linux-ia64@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, Sergei Trofimovich <slyfox@gentoo.org>
Subject: [PATCH] ia64: simplify code flow around swiotlb init
Date: Thu, 25 Mar 2021 23:35:30 +0000 [thread overview]
Message-ID: <20210325233530.1397011-1-slyfox@gentoo.org> (raw)
Before the change CONFIG_INTEL_IOMMU && !CONFIG_SWIOTLB && !CONFIG_FLATMEM
could skip `set_max_mapnr(max_low_pfn);` is iommu is not present on system.
CC: Andrew Morton <akpm@linux-foundation.org>
CC: linux-ia64@vger.kernel.org
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
---
arch/ia64/mm/init.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index 16d0d7d22657..a63585db94fe 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -644,13 +644,16 @@ mem_init (void)
* _before_ any drivers that may need the PCI DMA interface are
* initialized or bootmem has been freed.
*/
+ do {
#ifdef CONFIG_INTEL_IOMMU
- detect_intel_iommu();
- if (!iommu_detected)
+ detect_intel_iommu();
+ if (iommu_detected)
+ break;
#endif
#ifdef CONFIG_SWIOTLB
swiotlb_init(1);
#endif
+ } while (0);
#ifdef CONFIG_FLATMEM
BUG_ON(!mem_map);
--
2.31.0
next reply other threads:[~2021-03-25 23:36 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-25 23:35 Sergei Trofimovich [this message]
2021-03-26 7:39 ` [PATCH] ia64: simplify code flow around swiotlb init John Paul Adrian Glaubitz
2021-03-26 7:39 ` John Paul Adrian Glaubitz
2021-03-28 20:24 ` [PATCH v2] " Sergei Trofimovich
2021-03-28 20:24 ` Sergei Trofimovich
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