From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id B12872C0302 for ; Fri, 13 Jul 2012 18:01:35 +1000 (EST) Received: from [127.0.0.1] (localhost.localdomain [127.0.0.1]) by gate.crashing.org (8.14.1/8.13.8) with ESMTP id q6D81T8U002034 for ; Fri, 13 Jul 2012 03:01:31 -0500 Message-ID: <1342166487.15597.15.camel@pasglop> Subject: [PATCH] powerpc/iommu: Fix iommu pool initialization From: Benjamin Herrenschmidt To: linuxppc-dev Date: Fri, 13 Jul 2012 18:01:27 +1000 Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , The iommu pool patch has a bug where it would cause a crash when using only one pool (based on the size of the DMA window). Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/kernel/iommu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c index fbefe72..ff5a6ce 100644 --- a/arch/powerpc/kernel/iommu.c +++ b/arch/powerpc/kernel/iommu.c @@ -676,9 +676,9 @@ struct iommu_table *iommu_init_table(struct iommu_table *tbl, int nid) tbl->nr_pools = 1; /* We reserve the top 1/4 of the table for large allocations */ - tbl->poolsize = (tbl->it_size * 3 / 4) / IOMMU_NR_POOLS; + tbl->poolsize = (tbl->it_size * 3 / 4) / tbl->nr_pools; - for (i = 0; i < IOMMU_NR_POOLS; i++) { + for (i = 0; i < tbl->nr_pools; i++) { p = &tbl->pools[i]; spin_lock_init(&(p->lock)); p->start = tbl->poolsize * i;