2019-05-19 13:08:20 +01:00
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2008-03-06 13:39:18 +09:00
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2005-04-16 15:20:36 -07:00
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2008-03-06 13:39:18 +09:00
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2005-04-16 15:20:36 -07:00
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2022-07-18 09:23:17 +02:00
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2005-04-16 15:20:36 -07:00
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2008-07-29 22:10:01 +09:00
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2005-04-16 15:20:36 -07:00
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2009-03-17 09:30:36 +09:00
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2005-04-16 15:20:36 -07:00
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2008-07-29 22:10:01 +09:00
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2005-04-16 15:20:36 -07:00
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2007-10-16 01:29:04 -07:00
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2008-07-29 22:10:01 +09:00
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2005-04-16 15:20:36 -07:00
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2007-08-10 13:00:48 -07:00
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2005-04-16 15:20:36 -07:00
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2012-12-21 13:07:39 -08:00
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2005-04-16 15:20:36 -07:00
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2012-12-21 13:07:39 -08:00
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2005-04-16 15:20:36 -07:00
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2019-06-07 14:38:07 +02:00
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2007-08-10 13:00:47 -07:00
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2005-04-16 15:20:36 -07:00
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2012-12-21 13:07:39 -08:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2017-09-04 16:00:50 +02:00
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2005-04-16 15:20:36 -07:00
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2006-09-27 16:03:25 +09:00
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2005-04-16 15:20:36 -07:00
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2009-03-17 09:30:36 +09:00
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2005-04-16 15:20:36 -07:00
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2012-12-21 13:07:39 -08:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2012-12-21 13:07:39 -08:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2007-07-17 04:05:39 -07:00
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2005-04-16 15:20:36 -07:00
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2007-07-17 04:05:39 -07:00
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2005-04-16 15:20:36 -07:00
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2019-06-07 14:38:07 +02:00
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2019-06-07 14:38:07 +02:00
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2019-06-07 14:38:07 +02:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2019-07-22 15:33:58 -05:00
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2005-04-16 15:20:36 -07:00
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2019-07-22 15:33:58 -05:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2008-03-06 13:39:18 +09:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2007-08-10 13:00:48 -07:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2019-06-07 14:38:07 +02:00
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2005-04-16 15:20:36 -07:00
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2009-03-17 09:30:36 +09:00
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2007-05-08 00:39:02 -07:00
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2005-04-16 15:20:36 -07:00
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fbdev: Validate info->screen_{base, buffer} in fb_ops implementations
Push the test for info->screen_base from fb_read() and fb_write() into
the implementations of struct fb_ops.{fb_read,fb_write}. In cases where
the driver operates on info->screen_buffer, test this field instead.
While bothi fields, screen_base and screen_buffer, are stored in the
same location, they refer to different address spaces. For correctness,
we want to test each field in exactly the code that uses it.
v2:
* also test screen_base in pvr2fb (Geert)
* also test screen_buffer in ivtvfb, arcfb, broadsheetfb,
hecubafb, metronomefb and ssd1307fb (Geert)
* give a rational for the change (Geert)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Tested-by: Sui Jingfeng <suijingfeng@loongson.cn>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Acked-by: Helge Deller <deller@gmx.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230428122452.4856-18-tzimmermann@suse.de
2023-04-28 14:24:50 +02:00
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2005-04-16 15:20:36 -07:00
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treewide: kmalloc() -> kmalloc_array()
The kmalloc() function has a 2-factor argument form, kmalloc_array(). This
patch replaces cases of:
kmalloc(a * b, gfp)
with:
kmalloc_array(a * b, gfp)
as well as handling cases of:
kmalloc(a * b * c, gfp)
with:
kmalloc(array3_size(a, b, c), gfp)
as it's slightly less ugly than:
kmalloc_array(array_size(a, b), c, gfp)
This does, however, attempt to ignore constant size factors like:
kmalloc(4 * 1024, gfp)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
The tools/ directory was manually excluded, since it has its own
implementation of kmalloc().
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@
(
kmalloc(
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
|
kmalloc(
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@
(
kmalloc(
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
|
kmalloc(
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
|
kmalloc(
- sizeof(char) * (COUNT)
+ COUNT
, ...)
|
kmalloc(
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
|
kmalloc(
- sizeof(u8) * COUNT
+ COUNT
, ...)
|
kmalloc(
- sizeof(__u8) * COUNT
+ COUNT
, ...)
|
kmalloc(
- sizeof(char) * COUNT
+ COUNT
, ...)
|
kmalloc(
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * (COUNT_ID)
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * COUNT_ID
+ COUNT_ID, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * (COUNT_CONST)
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * COUNT_CONST
+ COUNT_CONST, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * (COUNT_ID)
+ COUNT_ID, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * COUNT_ID
+ COUNT_ID, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * (COUNT_CONST)
+ COUNT_CONST, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * COUNT_CONST
+ COUNT_CONST, sizeof(THING)
, ...)
)
// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@
- kmalloc
+ kmalloc_array
(
- SIZE * COUNT
+ COUNT, SIZE
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
kmalloc(
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kmalloc(
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kmalloc(
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kmalloc(
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
|
kmalloc(
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kmalloc(
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kmalloc(
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
|
kmalloc(
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
kmalloc(
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kmalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kmalloc(
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kmalloc(
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kmalloc(
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
|
kmalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@
(
kmalloc(
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
kmalloc(C1 * C2 * C3, ...)
|
kmalloc(
- (E1) * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
|
kmalloc(
- (E1) * (E2) * E3
+ array3_size(E1, E2, E3)
, ...)
|
kmalloc(
- (E1) * (E2) * (E3)
+ array3_size(E1, E2, E3)
, ...)
|
kmalloc(
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@
(
kmalloc(sizeof(THING) * C2, ...)
|
kmalloc(sizeof(TYPE) * C2, ...)
|
kmalloc(C1 * C2 * C3, ...)
|
kmalloc(C1 * C2, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * (E2)
+ E2, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * E2
+ E2, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * (E2)
+ E2, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * E2
+ E2, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- (E1) * E2
+ E1, E2
, ...)
|
- kmalloc
+ kmalloc_array
(
- (E1) * (E2)
+ E1, E2
, ...)
|
- kmalloc
+ kmalloc_array
(
- E1 * E2
+ E1, E2
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-12 13:55:00 -07:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2020-05-21 21:15:06 -07:00
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2005-04-16 15:20:36 -07:00
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|
video: fbdev: fix error handling for get_user_pages_fast()
Dealing with the return value of get_user_pages*() variants has a few
classic pitfalls, and this driver found one of them: the return value
might be zero, positive, or -errno. And if positive, it might be fewer
pages than were requested. And if fewer pages than requested, then
the caller should return (via put_page()) the pages that *were*
pinned.
This driver was doing that *except* that it had a problem with the
-errno case, which was being stored in an unsigned int, and which
would case an interesting mess if it ever happened: nr_pages would be
interpreted as a spectacularly huge unsigned value, rather than a
small negative value. Also, it was unnecessarily overriding a
potentially informative -errno, with -EINVAL, in some cases.
Instead: clamp the nr_pages to zero or positive, so that the error
handling works. And return the -errno value from get_user_pages*(),
unchanged, if we get one. And explain this with comments, seeing as
how it is error-prone.
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Gustavo A. R. Silva <gustavo@embeddedor.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-fbdev@vger.kernel.org
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200522041506.39638-2-jhubbard@nvidia.com
2020-05-21 21:15:05 -07:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2020-05-21 21:15:06 -07:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2009-03-17 09:30:36 +09:00
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2005-04-16 15:20:36 -07:00
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2019-12-03 18:38:50 +02:00
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2019-06-07 14:38:07 +02:00
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2023-09-27 09:27:01 +02:00
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2019-06-07 14:38:07 +02:00
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2023-09-27 09:27:01 +02:00
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2019-06-07 14:38:07 +02:00
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2023-09-27 09:27:01 +02:00
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2019-06-07 14:38:07 +02:00
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2019-06-21 13:04:38 +02:00
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2019-06-07 14:38:07 +02:00
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2019-06-21 13:04:38 +02:00
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2019-06-07 14:38:07 +02:00
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2019-06-07 14:38:07 +02:00
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2019-06-07 14:38:07 +02:00
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2019-06-07 14:38:07 +02:00
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2019-06-07 14:38:07 +02:00
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2019-06-07 14:38:07 +02:00
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2005-04-16 15:20:36 -07:00
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2019-06-07 14:38:07 +02:00
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2005-04-16 15:20:36 -07:00
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2020-01-06 09:43:50 +01:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2020-01-06 09:43:50 +01:00
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2019-06-07 14:38:07 +02:00
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2005-04-16 15:20:36 -07:00
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2023-05-12 12:24:44 +02:00
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2005-04-16 15:20:36 -07:00
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2007-08-10 13:00:47 -07:00
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2023-07-15 20:51:47 +02:00
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2005-04-16 15:20:36 -07:00
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2007-08-10 13:00:48 -07:00
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2005-04-16 15:20:36 -07:00
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2013-09-19 18:35:55 -07:00
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2019-06-07 14:38:07 +02:00
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2005-04-16 15:20:36 -07:00
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2013-09-19 18:35:55 -07:00
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2005-04-16 15:20:36 -07:00
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2010-02-17 13:23:00 +09:00
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2005-04-16 15:20:36 -07:00
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2013-09-19 18:35:55 -07:00
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2005-04-16 15:20:36 -07:00
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2019-06-07 14:38:07 +02:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2007-09-10 12:01:42 +09:00
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2005-04-16 15:20:36 -07:00
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2009-03-17 09:30:36 +09:00
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2005-04-16 15:20:36 -07:00
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2012-03-11 20:36:21 +01:00
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2005-04-16 15:20:36 -07:00
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2019-06-21 15:13:13 +02:00
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2005-04-16 15:20:36 -07:00
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2006-12-08 02:40:06 -08:00
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2019-06-07 14:38:07 +02:00
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2006-12-08 02:40:06 -08:00
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2012-03-11 20:36:21 +01:00
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2009-03-17 09:30:36 +09:00
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2005-04-16 15:20:36 -07:00
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2012-12-21 13:07:39 -08:00
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2005-04-16 15:20:36 -07:00
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2022-07-18 09:23:17 +02:00
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2005-04-16 15:20:36 -07:00
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2012-12-21 13:07:39 -08:00
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2005-04-16 15:20:36 -07:00
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2006-12-08 02:40:06 -08:00
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2019-06-07 14:38:07 +02:00
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2006-12-08 02:40:06 -08:00
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2005-04-16 15:20:36 -07:00
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2017-08-01 17:20:41 +02:00
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2005-04-16 15:20:36 -07:00
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2012-12-21 13:07:39 -08:00
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2005-04-16 15:20:36 -07:00
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2019-06-21 15:13:13 +02:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2020-07-20 12:18:45 -07:00
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2005-04-16 15:20:36 -07:00
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2019-06-07 14:38:07 +02:00
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2005-04-16 15:20:36 -07:00
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2019-06-07 14:38:07 +02:00
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2005-04-16 15:20:36 -07:00
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2012-01-13 16:42:50 +09:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2022-11-11 14:30:24 +01:00
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2005-04-16 15:20:36 -07:00
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2022-11-11 14:30:24 +01:00
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2005-04-16 15:20:36 -07:00
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2007-08-10 13:00:47 -07:00
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2019-06-28 12:30:08 +02:00
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2005-04-16 15:20:36 -07:00
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2007-08-10 13:00:47 -07:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2007-08-10 13:00:47 -07:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2007-07-07 03:38:51 +09:00
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2005-04-16 15:20:36 -07:00
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2007-08-10 13:00:47 -07:00
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2005-04-16 15:20:36 -07:00
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