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return same error value from spk_set_key_info 

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@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pranay Kr. Srivastava 2017-03-21 12:40:22 +05:30 committed by Greg Kroah-Hartman
parent 2c14d2e426
commit 4e9cc9a0a5
1 changed files with 19 additions and 8 deletions
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27
drivers/staging/speakup/main.c
View File

@ -1226,13 +1226,19 @@ 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;
@ -1243,14 +1249,19 @@ 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;
}