Pranay Kr. Srivastava, on mar. 28 févr. 2017 13:57:53 +0530, wrote:
> This patch makes spk_set_key_info return -EINVAL
> in case of failure instead of returning 4 different
> values for the type of error that occurred.
>
> Print the offending values instead as debug message.
>
> Signed-off-by: Pranay Kr. Srivastava <pranjas@xxxxxxxxx>
Reviewed-by: Samuel Thibault <samuel.thibault@xxxxxxxxxxxx>
> ---
> drivers/staging/speakup/main.c | 27 +++++++++++++++++++--------
> 1 file changed, 19 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/staging/speakup/main.c b/drivers/staging/speakup/main.c
> index c2f70ef..a1d5b66 100644
> --- a/drivers/staging/speakup/main.c
> +++ b/drivers/staging/speakup/main.c
> @@ -1216,13 +1216,19 @@ int spk_set_key_info(const u_char *key_info, u_char *k_buffer)
> u_char ch, version, num_keys;
>
> version = *cp++;
> - if (version != KEY_MAP_VER)
> - return -1;
> + if (version != KEY_MAP_VER) {
> + pr_debug("version found %d should be %d\n",
> + version, KEY_MAP_VER);
> + return -EINVAL;
> + }
> num_keys = *cp;
> states = (int)cp[1];
> key_data_len = (states + 1) * (num_keys + 1);
> - if (key_data_len + SHIFT_TBL_SIZE + 4 >= sizeof(spk_key_buf))
> - return -2;
> + if (key_data_len + SHIFT_TBL_SIZE + 4 >= sizeof(spk_key_buf)) {
> + pr_debug("too many key_infos (%d over %u)\n",
> + key_data_len + SHIFT_TBL_SIZE + 4, (unsigned int)(sizeof(spk_key_buf)));
> + return -EINVAL;
> + }
> memset(k_buffer, 0, SHIFT_TBL_SIZE);
> memset(spk_our_keys, 0, sizeof(spk_our_keys));
> spk_shift_table = k_buffer;
> @@ -1233,14 +1239,19 @@ int spk_set_key_info(const u_char *key_info, u_char *k_buffer)
> cp1 += 2; /* now pointing at shift states */
> for (i = 1; i <= states; i++) {
> ch = *cp1++;
> - if (ch >= SHIFT_TBL_SIZE)
> - return -3;
> + if (ch >= SHIFT_TBL_SIZE) {
> + pr_debug("(%d) not valid shift state (max_allowed = %d)\n", ch,
> + SHIFT_TBL_SIZE);
> + return -EINVAL;
> + }
> spk_shift_table[ch] = i;
> }
> keymap_flags = *cp1++;
> while ((ch = *cp1)) {
> - if (ch >= MAX_KEY)
> - return -4;
> + if (ch >= MAX_KEY) {
> + pr_debug("(%d), not valid key, (max_allowed = %d)\n", ch, MAX_KEY);
> + return -EINVAL;
> + }
> spk_our_keys[ch] = cp1;
> cp1 += states + 1;
> }
> --
> 2.10.2
>
--
Samuel
Progress (n.): The process through which the Internet has evolved from
smart people in front of dumb terminals to dumb people in front of smart
terminals.
_______________________________________________
devel mailing list
devel@xxxxxxxxxxxxxxxxxxxxxx
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
