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Message-Id: <f36dee062c55ef65e8aff8b6206479f1ba8091c6.1307006502.git.mika.westerberg@iki.fi>
Date: Thu, 2 Jun 2011 12:38:15 +0300
From: Mika Westerberg <mika.westerberg@....fi>
To: netdev@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org, kernel@...tstofly.org,
hsweeten@...ionengravers.com, ryan@...ewatersys.com,
Mika Westerberg <mika.westerberg@....fi>
Subject: [PATCH 3/5] net: ep93xx_eth: drop GFP_DMA from call to dma_alloc_coherent()
Commit a197b59ae6e8 (mm: fail GFP_DMA allocations when ZONE_DMA is not
configured) made page allocator to return NULL if GFP_DMA is set but
CONFIG_ZONE_DMA is disabled.
This causes ep93xx_eth to fail:
WARNING: at mm/page_alloc.c:2251 __alloc_pages_nodemask+0x11c/0x638()
Modules linked in:
[<c0035498>] (unwind_backtrace+0x0/0xf4) from [<c0043da4>] (warn_slowpath_common+0x48/0x60)
[<c0043da4>] (warn_slowpath_common+0x48/0x60) from [<c0043dd8>] (warn_slowpath_null+0x1c/0x24)
[<c0043dd8>] (warn_slowpath_null+0x1c/0x24) from [<c0083b6c>] (__alloc_pages_nodemask+0x11c/0x638)
[<c0083b6c>] (__alloc_pages_nodemask+0x11c/0x638) from [<c00366fc>] (__dma_alloc+0x8c/0x3ec)
[<c00366fc>] (__dma_alloc+0x8c/0x3ec) from [<c0036adc>] (dma_alloc_coherent+0x54/0x60)
[<c0036adc>] (dma_alloc_coherent+0x54/0x60) from [<c0227808>] (ep93xx_open+0x20/0x864)
[<c0227808>] (ep93xx_open+0x20/0x864) from [<c0283144>] (__dev_open+0xb8/0x108)
[<c0283144>] (__dev_open+0xb8/0x108) from [<c0280528>] (__dev_change_flags+0x70/0x128)
[<c0280528>] (__dev_change_flags+0x70/0x128) from [<c0283054>] (dev_change_flags+0x10/0x48)
[<c0283054>] (dev_change_flags+0x10/0x48) from [<c001a720>] (ip_auto_config+0x190/0xf68)
[<c001a720>] (ip_auto_config+0x190/0xf68) from [<c00233b0>] (do_one_initcall+0x34/0x18c)
[<c00233b0>] (do_one_initcall+0x34/0x18c) from [<c0008400>] (kernel_init+0x94/0x134)
[<c0008400>] (kernel_init+0x94/0x134) from [<c0030858>] (kernel_thread_exit+0x0/0x8)
Since there is no restrictions for DMA on ep93xx, we can fix this by just
removing the GFP_DMA flag from the call.
Signed-off-by: Mika Westerberg <mika.westerberg@....fi>
---
drivers/net/arm/ep93xx_eth.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/net/arm/ep93xx_eth.c b/drivers/net/arm/ep93xx_eth.c
index 0c9df11..56b51a1 100644
--- a/drivers/net/arm/ep93xx_eth.c
+++ b/drivers/net/arm/ep93xx_eth.c
@@ -495,7 +495,7 @@ static int ep93xx_alloc_buffers(struct ep93xx_priv *ep)
int i;
ep->descs = dma_alloc_coherent(dev, sizeof(struct ep93xx_descs),
- &ep->descs_dma_addr, GFP_KERNEL | GFP_DMA);
+ &ep->descs_dma_addr, GFP_KERNEL);
if (ep->descs == NULL)
return 1;
--
1.7.4.4
--
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