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| author |   Stefan Richter <stefanr@s5r6.in-berlin.de> | 2014-11-19 11:52:00 +0100 |
|---|---|---|
| committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2014-12-10 20:53:02 +0100 |
| commit | 0238507b951857360461b0635111e7376ffd44d1 (patch) | |
| tree | c6952e34b302fc2f3fac4fbdcffa369bf264d611 /drivers/firewire | |
| parent | firewire: ohci: replace vm_map_ram() with vmap() (diff) | |
| download | linux-dev-0238507b951857360461b0635111e7376ffd44d1.tar.xz linux-dev-0238507b951857360461b0635111e7376ffd44d1.zip | |
firewire: core: document fw_csr_string's truncation of long strings
fw_csr_string() truncates and terminates target strings like strlcpy()
does. Unlike strlcpy(), it returns the target strlen, not the source
strlen, hence users of fw_csr_string() are unable to detect truncation.
Point this behavior out in the kerneldoc comment.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Diffstat (limited to 'drivers/firewire')
| -rw-r--r-- | drivers/firewire/core-device.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/firewire/core-device.c b/drivers/firewire/core-device.c index 2c6d5e118ac1..f9e3aee6a211 100644 --- a/drivers/firewire/core-device.c +++ b/drivers/firewire/core-device.c @@ -115,6 +115,9 @@ static int textual_leaf_to_string(const u32 *block, char *buf, size_t size) * * The string is taken from a minimal ASCII text descriptor leaf after * the immediate entry with @key. The string is zero-terminated. + * An overlong string is silently truncated such that it and the + * zero byte fit into @size. + * * Returns strlen(buf) or a negative error code. */ int fw_csr_string(const u32 *directory, int key, char *buf, size_t size) |