linux-kernel - [PATCH V8 1/6] csky/dma: bugfix dma_sync_for

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 for Android: free password hash cracker in your pocket

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

Message-Id: <1ccf1bed89758a5a9b57ac2ce6d11ca898a1b9ae.1537417413.git.ren_guo@c-sky.com>
Date:   Thu, 20 Sep 2018 13:39:27 +0800
From:   Guo Ren <ren_guo@...ky.com>
To:     tglx@...utronix.de, jason@...edaemon.net, marc.zyngier@....com,
        robh+dt@...nel.org, mark.rutland@....com, arnd@...db.de,
        robh@...nel.org, sfr@...b.auug.org.au
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arch@...r.kernel.org, c-sky_gcc_upstream@...ky.com,
        gnu-csky@...tor.com, green.hu@...il.com,
        Guo Ren <ren_guo@...ky.com>
Subject: [PATCH V8 1/6] csky/dma: bugfix dma_sync_for_cpu/device

ref: https://lkml.org/lkml/2018/5/18/1068

        map             for_cpu         for_device      unmap
TO_DEV  writeback       none            writeback       none
TO_CPU  invalidate      invalidate*     invalidate      invalidate*
BIDIR   writeback       invalidate      writeback       invalidate

Signed-off-by: Guo Ren <ren_guo@...ky.com>
---
 arch/csky/mm/dma-mapping.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/csky/mm/dma-mapping.c b/arch/csky/mm/dma-mapping.c
index 16c2087..30a2041 100644
--- a/arch/csky/mm/dma-mapping.c
+++ b/arch/csky/mm/dma-mapping.c
@@ -217,7 +217,8 @@ void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr,
 		break;
 	case DMA_FROM_DEVICE:
 	case DMA_BIDIRECTIONAL:
-		BUG();
+		dma_wbinv_range(vaddr + offset, vaddr + offset + size);
+		break;
 	default:
 		BUG();
 	}
@@ -240,7 +241,7 @@ void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr,
 
 	switch (dir) {
 	case DMA_TO_DEVICE:
-		BUG();
+		break;
 	case DMA_FROM_DEVICE:
 	case DMA_BIDIRECTIONAL:
 		dma_wbinv_range(vaddr + offset, vaddr + offset + size);
-- 
2.7.4