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staging: vc04_services: Convert get_user_pages*() --> pin_user_pages*()

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In 2019, we introduced pin_user_pages*() and now we are converting
get_user_pages*() to the new API as appropriate. [1] & [2] could
be referred for more information.

[1] Documentation/core-api/pin_user_pages.rst

[2] "Explicit pinning of user-space pages":
        https://lwn.net/Articles/807108/

Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Link: https://lore.kernel.org/r/1591124057-27696-1-git-send-email-jrdr.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Souptick Joarder 2020-06-03 00:24:17 +05:30 committed by Greg Kroah-Hartman
parent c5a3b1db6a
commit aeb4ac7916
1 changed files with 5 additions and 11 deletions
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16
drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
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@ -287,12 +287,8 @@ cleanup_pagelistinfo(struct vchiq_pagelist_info *pagelistinfo)
pagelistinfo->num_pages, pagelistinfo->dma_dir);
}
if (pagelistinfo->pages_need_release) {
unsigned int i;
for (i = 0; i < pagelistinfo->num_pages; i++)
put_page(pagelistinfo->pages[i]);
}
if (pagelistinfo->pages_need_release)
unpin_user_pages(pagelistinfo->pages, pagelistinfo->num_pages);
dma_free_coherent(g_dev, pagelistinfo->pagelist_buffer_size,
pagelistinfo->pagelist, pagelistinfo->dma_addr);
@ -395,7 +391,7 @@ create_pagelist(char __user *buf, size_t count, unsigned short type)
}
/* do not try and release vmalloc pages */
} else {
actual_pages = get_user_pages_fast(
actual_pages = pin_user_pages_fast(
(unsigned long)buf & PAGE_MASK,
num_pages,
type == PAGELIST_READ,
@ -407,10 +403,8 @@ create_pagelist(char __user *buf, size_t count, unsigned short type)
__func__, actual_pages, num_pages);
/* This is probably due to the process being killed */
while (actual_pages > 0) {
actual_pages--;
put_page(pages[actual_pages]);
}
if (actual_pages > 0)
unpin_user_pages(pages, actual_pages);
cleanup_pagelistinfo(pagelistinfo);
return NULL;
}