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staging: vc04_services: call sg_init_table to init scatterlist

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Call the sg_init_table function to correctly initialze
the DMA scatterlist.  This function is required to completely
initialize the list and is mandatory if DMA debugging is
enabled in the build configuration.

One of the purposes of sg_init_table is to set
the magic "cookie" on each list element and ensure
the chain end is marked.

Signed-off-by: Michael Zoran <mzoran@crowfest.net>
Acked-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Michael Zoran 2016-10-28 10:58:13 -07:00 committed by Greg Kroah-Hartman
parent 2a0fc8bc0c
commit dc5424ae0b
1 changed files with 6 additions and 0 deletions
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6
drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
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@ -453,6 +453,12 @@ create_pagelist(char __user *buf, size_t count, unsigned short type,
pagelist->type = type;
pagelist->offset = offset;
/*
* Initialize the scatterlist so that the magic cookie
* is filled if debugging is enabled
*/
sg_init_table(scatterlist, num_pages);
/* Now set the pages for each scatterlist */
for (i = 0; i < num_pages; i++)
sg_set_page(scatterlist + i, pages[i], PAGE_SIZE, 0);