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author | Andrey Smirnov <andrew.smirnov@gmail.com> | 2018-12-20 23:28:37 -0800 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-22 10:23:17 +0100 |
commit | 8092e79204e7884f4bee3584ecfe6cf4a124d129 (patch) | |
tree | a9916d2924add24668967afc4305ad39eb195b17 /include/linux/ihex.h | |
parent | 570d0200123fb4f809aa2f6226e93a458d664d70 (diff) | |
download | linux-8092e79204e7884f4bee3584ecfe6cf4a124d129.tar.gz linux-8092e79204e7884f4bee3584ecfe6cf4a124d129.tar.bz2 linux-8092e79204e7884f4bee3584ecfe6cf4a124d129.zip |
ihex: Share code between ihex_validate_fw() and ihex_next_binrec()
Convert both ihex_validate_fw() and ihex_next_binrec() to use a helper
function to calculate next record offest. This way we only have one
place implementing next record offset calculation logic. No functional
change intended.
Cc: Chris Healy <cphealy@gmail.com>
Cc: Kyle McMartin <kyle@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/ihex.h')
-rw-r--r-- | include/linux/ihex.h | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/include/linux/ihex.h b/include/linux/ihex.h index 75c194391869..9c701521176b 100644 --- a/include/linux/ihex.h +++ b/include/linux/ihex.h @@ -23,29 +23,34 @@ struct ihex_binrec { /* Find the next record, taking into account the 4-byte alignment */ static inline const struct ihex_binrec * -ihex_next_binrec(const struct ihex_binrec *rec) +__ihex_next_binrec(const struct ihex_binrec *rec) { int next = ((be16_to_cpu(rec->len) + 5) & ~3) - 2; rec = (void *)&rec->data[next]; + return rec; +} + +static inline const struct ihex_binrec * +ihex_next_binrec(const struct ihex_binrec *rec) +{ + rec = __ihex_next_binrec(rec); + return be16_to_cpu(rec->len) ? rec : NULL; } /* Check that ihex_next_binrec() won't take us off the end of the image... */ static inline int ihex_validate_fw(const struct firmware *fw) { - const struct ihex_binrec *rec; - size_t ofs = 0; + const struct ihex_binrec *end, *rec; - while (ofs <= fw->size - sizeof(*rec)) { - rec = (void *)&fw->data[ofs]; + rec = (const void *)fw->data; + end = (const void *)&fw->data[fw->size - sizeof(*end)]; + for (; rec <= end; rec = __ihex_next_binrec(rec)) { /* Zero length marks end of records */ if (!be16_to_cpu(rec->len)) return 0; - - /* Point to next record... */ - ofs += (sizeof(*rec) + be16_to_cpu(rec->len) + 3) & ~3; } return -EINVAL; } |