xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

RDMA/cxgb4: Save the correct map length for fast_reg_page_lists

Browse Source 
We cannot save the mapped length using the rdma max_page_list_len field
of the ib_fast_reg_page_list struct because the core code uses it.  This
results in an incorrect unmap of the page list in c4iw_free_fastreg_pbl().

I found this with dma mapping debugging enabled in the kernel.  The
fix is to save the length in the c4iw_fr_page_list struct.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Steve Wise
2014-03-19 17:44:45 +05:30
committed by Roland Dreier
parent df2d5130ec
commit eda6d1d1b7
2 changed files with 11 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/infiniband/hw/cxgb4/mem.c
View File

@@ -903,7 +903,11 @@ struct ib_fast_reg_page_list *c4iw_alloc_fastreg_pbl(struct ib_device *device,
dma_unmap_addr_set(c4pl, mapping, dma_addr);
c4pl->dma_addr = dma_addr;
c4pl->dev = dev;
c4pl->ibpl.max_page_list_len = pll_len;
c4pl->pll_len = pll_len;
PDBG("%s c4pl %p pll_len %u page_list %p dma_addr %pad\n",
__func__, c4pl, c4pl->pll_len, c4pl->ibpl.page_list,
&c4pl->dma_addr);
return &c4pl->ibpl;
}
@@ -912,8 +916,12 @@ void c4iw_free_fastreg_pbl(struct ib_fast_reg_page_list *ibpl)
{
struct c4iw_fr_page_list *c4pl = to_c4iw_fr_page_list(ibpl);
PDBG("%s c4pl %p pll_len %u page_list %p dma_addr %pad\n",
__func__, c4pl, c4pl->pll_len, c4pl->ibpl.page_list,
&c4pl->dma_addr);
dma_free_coherent(&c4pl->dev->rdev.lldi.pdev->dev,
c4pl->ibpl.max_page_list_len,
c4pl->pll_len,
c4pl->ibpl.page_list, dma_unmap_addr(c4pl, mapping));
kfree(c4pl);
}