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| author | Li Zhong <zhong@linux.vnet.ibm.com> | 2013-11-19 16:11:37 +0800 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-11-21 10:33:43 +1100 |
| commit | c6102609289de268bcc6093e606483ea8bb35c84 (patch) | |
| tree | 55a2ace670f91db06363faee93a1f5b8409dbc1f /arch/powerpc | |
| parent | dc7a9bd3d0583bdc6ac291b4e1bf540dea398ea2 (diff) | |
| download | linux-c6102609289de268bcc6093e606483ea8bb35c84.tar.bz2 | |
powerpc/vio: Fix a dma_mask issue of vio
I encountered following issue:
[ 0.283035] ibmvscsi 30000015: couldn't initialize event pool
[ 5.688822] ibmvscsi: probe of 30000015 failed with error -1
which prevents the storage from being recognized, and the machine from
booting.
After some digging, it seems that it is caused by commit 4886c399da
as dma_mask pointer in viodev->dev is not set, so in
dma_set_mask_and_coherent(), dma_set_coherent_mask() is not called
because dma_set_mask(), which is dma_set_mask_pSeriesLP() returned EIO.
While before the commit, dma_set_coherent_mask() is always called.
I tried to replace dma_set_mask_and_coherent() with
dma_coerce_mask_and_coherent(), and the machine could boot again.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/kernel/vio.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c index e7d0c88f621a..76a64821f4a2 100644 --- a/arch/powerpc/kernel/vio.c +++ b/arch/powerpc/kernel/vio.c @@ -1419,7 +1419,7 @@ struct vio_dev *vio_register_device_node(struct device_node *of_node) /* needed to ensure proper operation of coherent allocations * later, in case driver doesn't set it explicitly */ - dma_set_mask_and_coherent(&viodev->dev, DMA_BIT_MASK(64)); + dma_coerce_mask_and_coherent(&viodev->dev, DMA_BIT_MASK(64)); } /* register with generic device framework */ |