[U-Boot] [PATCH V2] cfb_console: force natural alignment of 32-bit fields in gzipped .bmp files
Wolfgang Denk
wd at denx.de
Fri Feb 28 22:44:39 CET 2014
Dear Eric Nelson,
your message contains no thread information - there is neither a
In-reply-to: nor any References: header. This is bad!
Please also make sure to keep the Subject: test short; the recommended
style for the commit message is "50/72 formatting", i. e. the Subject
should not exceed 50 (...60) characters.
In message <1393621572-10306-1-git-send-email-eric.nelson at boundarydevices.com> you wrote:
> .bmp files contain 32-bit integers aligned at offsets of +2, +6,
> et cetera within the bmp_header structure (see include/bmp_layout.h).
>
> Support for gzip-compressed .bmp files is present in the cfb_console
> display subsystem by uncompressing them prior to use.
>
> This patch forces the in-memory header to be aligned properly
> for these compressed images by extracting them to a 2-byte
> offset in the memory returned by malloc. Since malloc will always
> return a 4-byte aligned value, this forces the .bmp header
> fields to be naturally aligned on 4-byte addresses.
>
> Refer to these files for more details:
> doc/README.displaying-bmps
> doc/README.arm-unaligned-accesses
>
> Signed-off-by: Eric Nelson <eric.nelson at boundarydevices.com>
> ---
> drivers/video/cfb_console.c | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
So what exactly has changed since version 1? Please note that the
change log is mandatory!
> diff --git a/drivers/video/cfb_console.c b/drivers/video/cfb_console.c
> index 6db4073..2209148 100644
> --- a/drivers/video/cfb_console.c
> +++ b/drivers/video/cfb_console.c
> @@ -1473,7 +1473,10 @@ int video_display_bitmap(ulong bmp_image, int x, int y)
> printf("Error: malloc in gunzip failed!\n");
> return 1;
> }
> - if (gunzip(dst, CONFIG_SYS_VIDEO_LOGO_MAX_SIZE,
> + /* NB: we need to force offset of +2
> + * See doc/README.displaying-bmps
> + */
Incorrect multiline comment style, please fix.
I asked you before to fix that, please make sure not to ignore
review comments!
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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magic and bullshit.
H's Dictum: There is no magic ...
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