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isdn: eicon: Use offsetof 

Use offsetof instead of explicit implementation.

* fixes bug with omitted & like:
  len = (byte)(((T30_INFO *) 0)->station_id + 20)

* avoids compiler warnings with wrong sizes (pointer-to-char cast):
  len = (byte)(&(((T30_INFO *) 0)->universal_6));

* cleans up the code

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Karsten Keil <isdn@linux-pingi.de>
Acked-by: Armin Schindler <armin@melware.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Slaby 2009-11-04 08:28:12 -08:00 committed by David S. Miller
parent 08cb3f60b2
commit 1ea70841f0
1 changed files with 9 additions and 9 deletions
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18
drivers/isdn/hardware/eicon/message.c
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@ -2692,7 +2692,7 @@ static byte connect_b3_req(dword Id, word Number, DIVA_CAPI_ADAPTER *a,
if (!(fax_control_bits & T30_CONTROL_BIT_MORE_DOCUMENTS)
|| (fax_feature_bits & T30_FEATURE_BIT_MORE_DOCUMENTS))
{
len = (byte)(&(((T30_INFO *) 0)->universal_6));
len = offsetof(T30_INFO, universal_6);
fax_info_change = false;
if (ncpi->length >= 4)
{
@ -2754,7 +2754,7 @@ static byte connect_b3_req(dword Id, word Number, DIVA_CAPI_ADAPTER *a,
for (i = 0; i < w; i++)
((T30_INFO *)(plci->fax_connect_info_buffer))->station_id[i] = fax_parms[4].info[1+i];
((T30_INFO *)(plci->fax_connect_info_buffer))->head_line_len = 0;
len = (byte)(((T30_INFO *) 0)->station_id + 20);
len = offsetof(T30_INFO, station_id) + 20;
w = fax_parms[5].length;
if (w > 20)
w = 20;
@ -2788,7 +2788,7 @@ static byte connect_b3_req(dword Id, word Number, DIVA_CAPI_ADAPTER *a,
}
else
{
len = (byte)(&(((T30_INFO *) 0)->universal_6));
len = offsetof(T30_INFO, universal_6);
}
fax_info_change = true;
@ -2892,7 +2892,7 @@ static byte connect_b3_res(dword Id, word Number, DIVA_CAPI_ADAPTER *a,
&& (plci->nsf_control_bits & T30_NSF_CONTROL_BIT_ENABLE_NSF)
&& (plci->nsf_control_bits & T30_NSF_CONTROL_BIT_NEGOTIATE_RESP))
{
len = ((byte)(((T30_INFO *) 0)->station_id + 20));
len = offsetof(T30_INFO, station_id) + 20;
if (plci->fax_connect_info_length < len)
{
((T30_INFO *)(plci->fax_connect_info_buffer))->station_id_len = 0;
@ -3802,7 +3802,7 @@ static byte manufacturer_res(dword Id, word Number, DIVA_CAPI_ADAPTER *a,
break;
}
ncpi = &m_parms[1];
len = ((byte)(((T30_INFO *) 0)->station_id + 20));
len = offsetof(T30_INFO, station_id) + 20;
if (plci->fax_connect_info_length < len)
{
((T30_INFO *)(plci->fax_connect_info_buffer))->station_id_len = 0;
@ -6844,7 +6844,7 @@ static void nl_ind(PLCI *plci)
if ((plci->requested_options_conn | plci->requested_options | a->requested_options_table[plci->appl->Id-1])
& ((1L << PRIVATE_FAX_SUB_SEP_PWD) | (1L << PRIVATE_FAX_NONSTANDARD)))
{
i = ((word)(((T30_INFO *) 0)->station_id + 20)) + ((T30_INFO *)plci->NL.RBuffer->P)->head_line_len;
i = offsetof(T30_INFO, station_id) + 20 + ((T30_INFO *)plci->NL.RBuffer->P)->head_line_len;
while (i < plci->NL.RBuffer->length)
plci->ncpi_buffer[++len] = plci->NL.RBuffer->P[i++];
}
@ -7236,7 +7236,7 @@ static void nl_ind(PLCI *plci)
{
plci->RData[1].P = plci->RData[0].P;
plci->RData[1].PLength = plci->RData[0].PLength;
plci->RData[0].P = v120_header_buffer + (-((int) v120_header_buffer) & 3);
plci->RData[0].P = v120_header_buffer + (-((unsigned long)v120_header_buffer) & 3);
if ((plci->NL.RBuffer->P[0] & V120_HEADER_EXTEND_BIT) || (plci->NL.RLength == 1))
plci->RData[0].PLength = 1;
else
@ -8473,7 +8473,7 @@ static word add_b23(PLCI *plci, API_PARSE *bp)
fax_control_bits |= T30_CONTROL_BIT_ACCEPT_SEL_POLLING;
}
len = nlc[0];
pos = ((byte)(((T30_INFO *) 0)->station_id + 20));
pos = offsetof(T30_INFO, station_id) + 20;
if (pos < plci->fax_connect_info_length)
{
for (i = 1 + plci->fax_connect_info_buffer[pos]; i != 0; i--)
@ -8525,7 +8525,7 @@ static word add_b23(PLCI *plci, API_PARSE *bp)
}
PUT_WORD(&(((T30_INFO *)&nlc[1])->control_bits_low), fax_control_bits);
len = ((byte)(((T30_INFO *) 0)->station_id + 20));
len = offsetof(T30_INFO, station_id) + 20;
for (i = 0; i < len; i++)
plci->fax_connect_info_buffer[i] = nlc[1+i];
((T30_INFO *) plci->fax_connect_info_buffer)->head_line_len = 0;