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  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]
Date:   Tue, 26 Mar 2019 15:49:56 -0700
From:   Nicolin Chen <nicoleotsuka@...il.com>
To:     hch@....de, robin.murphy@....com
Cc:     vdumpa@...dia.com, linux@...linux.org.uk, catalin.marinas@....com,
        will.deacon@....com, joro@...tes.org, m.szyprowski@...sung.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        iommu@...ts.linux-foundation.org, tony@...mide.com
Subject: [PATCH RFC/RFT 2/5] dma-remap: Run alloc_pages() on failure

The CMA allocation will skip allocations of single pages to save CMA
resource. This requires its callers to rebound those page allocations
from normal area.

So this patch moves the alloc_pages() call to the fallback routines.

Signed-off-by: Nicolin Chen <nicoleotsuka@...il.com>
---
 kernel/dma/remap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/dma/remap.c b/kernel/dma/remap.c
index 2b750f13bc8f..daab2f3186a2 100644
--- a/kernel/dma/remap.c
+++ b/kernel/dma/remap.c
@@ -116,7 +116,7 @@ int __init dma_atomic_pool_init(gfp_t gfp, pgprot_t prot)
 	if (dev_get_cma_area(NULL))
 		page = dma_alloc_from_contiguous(NULL, nr_pages,
 						 pool_size_order, false);
-	else
+	if (!page)
 		page = alloc_pages(gfp, pool_size_order);
 	if (!page)
 		goto out;
-- 
2.17.1

Powered by blists - more mailing lists