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ISDN: eicon: switch to use native bitmaps

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Two arrays are clearly bit maps, so, make that explicit by converting to
bitmap API and remove custom helpers.

Note sig_ind() uses out of boundary bit to (looks like) protect against
potential bitmap_empty() checks for the same bitmap.

This patch removes that since:
1) that didn't guarantee atomicity anyway;
2) the first operation inside the for-loop is set bit in the bitmap
   (which effectively makes it non-empty);
3) group_optimization() doesn't utilize possible emptiness of the bitmap
   in question.

Thus, if there is a protection needed it should be implemented properly.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andy Shevchenko 2017-07-18 18:49:26 +03:00 committed by David S. Miller
parent 9b17010da5
commit eeef1713ca
2 changed files with 58 additions and 205 deletions
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16
drivers/isdn/hardware/eicon/divacapi.h
View File

@ -26,15 +26,7 @@
/*#define DEBUG */
#include <linux/types.h>
#define IMPLEMENT_DTMF 1
#define IMPLEMENT_LINE_INTERCONNECT2 1
@ -82,8 +74,6 @@
#define CODEC_PERMANENT 0x02
#define ADV_VOICE 0x03
#define MAX_CIP_TYPES 5 /* kind of CIP types for group optimization */
#define C_IND_MASK_DWORDS ((MAX_APPL + 32) >> 5)
#define FAX_CONNECT_INFO_BUFFER_SIZE 256
#define NCPI_BUFFER_SIZE 256
@ -265,8 +255,8 @@ struct _PLCI {
word ncci_ring_list;
byte inc_dis_ncci_table[MAX_CHANNELS_PER_PLCI];
t_std_internal_command internal_command_queue[MAX_INTERNAL_COMMAND_LEVELS];
dword c_ind_mask_table[C_IND_MASK_DWORDS];
dword group_optimization_mask_table[C_IND_MASK_DWORDS];
DECLARE_BITMAP(c_ind_mask_table, MAX_APPL);
DECLARE_BITMAP(group_optimization_mask_table, MAX_APPL);
byte RBuffer[200];
dword msg_in_queue[MSG_IN_QUEUE_SIZE/sizeof(dword)];
API_SAVE saved_msg;

247
drivers/isdn/hardware/eicon/message.c
View File

@ -23,9 +23,7 @@
*
*/
#include <linux/bitmap.h>
#include "platform.h"
#include "di_defs.h"
@ -35,19 +33,9 @@
#include "mdm_msg.h"
#include "divasync.h"
#define FILE_ "MESSAGE.C"
#define dprintf
/*------------------------------------------------------------------*/
/* This is options supported for all adapters that are server by */
/* XDI driver. Allo it is not necessary to ask it from every adapter*/
@ -72,9 +60,6 @@ static dword diva_xdi_extended_features = 0;
/*------------------------------------------------------------------*/
static void group_optimization(DIVA_CAPI_ADAPTER *a, PLCI *plci);
static void set_group_ind_mask(PLCI *plci);
static void clear_group_ind_mask_bit(PLCI *plci, word b);
static byte test_group_ind_mask_bit(PLCI *plci, word b);
void AutomaticLaw(DIVA_CAPI_ADAPTER *);
word CapiRelease(word);
word CapiRegister(word);
@ -1086,106 +1071,6 @@ static void plci_remove(PLCI *plci)
plci->State = OUTG_DIS_PENDING;
}
/*------------------------------------------------------------------*/
/* Application Group function helpers */
/*------------------------------------------------------------------*/
static void set_group_ind_mask(PLCI *plci)
{
word i;
for (i = 0; i < C_IND_MASK_DWORDS; i++)
plci->group_optimization_mask_table[i] = 0xffffffffL;
}
static void clear_group_ind_mask_bit(PLCI *plci, word b)
{
plci->group_optimization_mask_table[b >> 5] &= ~(1L << (b & 0x1f));
}
static byte test_group_ind_mask_bit(PLCI *plci, word b)
{
return ((plci->group_optimization_mask_table[b >> 5] & (1L << (b & 0x1f))) != 0);
}
/*------------------------------------------------------------------*/
/* c_ind_mask operations for arbitrary MAX_APPL */
/*------------------------------------------------------------------*/
static void clear_c_ind_mask(PLCI *plci)
{
word i;
for (i = 0; i < C_IND_MASK_DWORDS; i++)
plci->c_ind_mask_table[i] = 0;
}
static byte c_ind_mask_empty(PLCI *plci)
{
word i;
i = 0;
while ((i < C_IND_MASK_DWORDS) && (plci->c_ind_mask_table[i] == 0))
i++;
return (i == C_IND_MASK_DWORDS);
}
static void set_c_ind_mask_bit(PLCI *plci, word b)
{
plci->c_ind_mask_table[b >> 5] |= (1L << (b & 0x1f));
}
static void clear_c_ind_mask_bit(PLCI *plci, word b)
{
plci->c_ind_mask_table[b >> 5] &= ~(1L << (b & 0x1f));
}
static byte test_c_ind_mask_bit(PLCI *plci, word b)
{
return ((plci->c_ind_mask_table[b >> 5] & (1L << (b & 0x1f))) != 0);
}
static void dump_c_ind_mask(PLCI *plci)
{
word i, j, k;
dword d;
char *p;
char buf[40];
for (i = 0; i < C_IND_MASK_DWORDS; i += 4)
{
p = buf + 36;
*p = '\0';
for (j = 0; j < 4; j++)
{
if (i + j < C_IND_MASK_DWORDS)
{
d = plci->c_ind_mask_table[i + j];
for (k = 0; k < 8; k++)
{
*(--p) = hex_asc_lo(d);
d >>= 4;
}
}
else if (i != 0)
{
for (k = 0; k < 8; k++)
*(--p) = ' ';
}
*(--p) = ' ';
}
dbug(1, dprintf("c_ind_mask =%s", (char *) p));
}
}
#define dump_plcis(a)
/*------------------------------------------------------------------*/
/* translation function for each message */
/*------------------------------------------------------------------*/
@ -1457,13 +1342,13 @@ static byte connect_res(dword Id, word Number, DIVA_CAPI_ADAPTER *a,
return 1;
}
else if (plci->State == INC_CON_PENDING || plci->State == INC_CON_ALERT) {
clear_c_ind_mask_bit(plci, (word)(appl->Id - 1));
dump_c_ind_mask(plci);
__clear_bit(appl->Id - 1, plci->c_ind_mask_table);
dbug(1, dprintf("c_ind_mask =%*pb", MAX_APPL, plci->c_ind_mask_table));
Reject = GET_WORD(parms[0].info);
dbug(1, dprintf("Reject=0x%x", Reject));
if (Reject)
{
if (c_ind_mask_empty(plci))
if (bitmap_empty(plci->c_ind_mask_table, MAX_APPL))
{
if ((Reject & 0xff00) == 0x3400)
{
@ -1553,11 +1438,8 @@ static byte connect_res(dword Id, word Number, DIVA_CAPI_ADAPTER *a,
sig_req(plci, CALL_RES, 0);
}
for (i = 0; i < max_appl; i++) {
if (test_c_ind_mask_bit(plci, i)) {
sendf(&application[i], _DISCONNECT_I, Id, 0, "w", _OTHER_APPL_CONNECTED);
}
}
for_each_set_bit(i, plci->c_ind_mask_table, max_appl)
sendf(&application[i], _DISCONNECT_I, Id, 0, "w", _OTHER_APPL_CONNECTED);
}
}
return 1;
@ -1584,13 +1466,10 @@ static byte disconnect_req(dword Id, word Number, DIVA_CAPI_ADAPTER *a,
{
if (plci->State == INC_CON_PENDING || plci->State == INC_CON_ALERT)
{
clear_c_ind_mask_bit(plci, (word)(appl->Id - 1));
__clear_bit(appl->Id - 1, plci->c_ind_mask_table);
plci->appl = appl;
for (i = 0; i < max_appl; i++)
{
if (test_c_ind_mask_bit(plci, i))
sendf(&application[i], _DISCONNECT_I, Id, 0, "w", 0);
}
for_each_set_bit(i, plci->c_ind_mask_table, max_appl)
sendf(&application[i], _DISCONNECT_I, Id, 0, "w", 0);
plci->State = OUTG_DIS_PENDING;
}
if (plci->Sig.Id && plci->appl)
@ -1634,7 +1513,7 @@ static byte disconnect_res(dword Id, word Number, DIVA_CAPI_ADAPTER *a,
{
/* clear ind mask bit, just in case of collsion of */
/* DISCONNECT_IND and CONNECT_RES */
clear_c_ind_mask_bit(plci, (word)(appl->Id - 1));
__clear_bit(appl->Id - 1, plci->c_ind_mask_table);
ncci_free_receive_buffers(plci, 0);
if (plci_remove_check(plci))
{
@ -1642,7 +1521,7 @@ static byte disconnect_res(dword Id, word Number, DIVA_CAPI_ADAPTER *a,
}
if (plci->State == INC_DIS_PENDING
|| plci->State == SUSPENDING) {
if (c_ind_mask_empty(plci)) {
if (bitmap_empty(plci->c_ind_mask_table, MAX_APPL)) {
if (plci->State != SUSPENDING) plci->State = IDLE;
dbug(1, dprintf("chs=%d", plci->channels));
if (!plci->channels) {
@ -3351,13 +3230,11 @@ static byte select_b_req(dword Id, word Number, DIVA_CAPI_ADAPTER *a,
}
plci->State = INC_CON_CONNECTED_ALERT;
plci->appl = appl;
clear_c_ind_mask_bit(plci, (word)(appl->Id - 1));
dump_c_ind_mask(plci);
for (i = 0; i < max_appl; i++) /* disconnect the other appls */
{ /* its quasi a connect */
if (test_c_ind_mask_bit(plci, i))
sendf(&application[i], _DISCONNECT_I, Id, 0, "w", _OTHER_APPL_CONNECTED);
}
__clear_bit(appl->Id - 1, plci->c_ind_mask_table);
dbug(1, dprintf("c_ind_mask =%*pb", MAX_APPL, plci->c_ind_mask_table));
/* disconnect the other appls its quasi a connect */
for_each_set_bit(i, plci->c_ind_mask_table, max_appl)
sendf(&application[i], _DISCONNECT_I, Id, 0, "w", _OTHER_APPL_CONNECTED);
}
api_save_msg(msg, "s", &plci->saved_msg);
@ -5692,19 +5569,17 @@ static void sig_ind(PLCI *plci)
cip = find_cip(a, parms[4], parms[6]);
cip_mask = 1L << cip;
dbug(1, dprintf("cip=%d,cip_mask=%lx", cip, cip_mask));
clear_c_ind_mask(plci);
bitmap_zero(plci->c_ind_mask_table, MAX_APPL);
if (!remove_started && !a->adapter_disabled)
{
set_c_ind_mask_bit(plci, MAX_APPL);
group_optimization(a, plci);
for (i = 0; i < max_appl; i++) {
for_each_set_bit(i, plci->group_optimization_mask_table, max_appl) {
if (application[i].Id
&& (a->CIP_Mask[i] & 1 || a->CIP_Mask[i] & cip_mask)
&& CPN_filter_ok(parms[0], a, i)
&& test_group_ind_mask_bit(plci, i)) {
&& CPN_filter_ok(parms[0], a, i)) {
dbug(1, dprintf("storedcip_mask[%d]=0x%lx", i, a->CIP_Mask[i]));
set_c_ind_mask_bit(plci, i);
dump_c_ind_mask(plci);
__set_bit(i, plci->c_ind_mask_table);
dbug(1, dprintf("c_ind_mask =%*pb", MAX_APPL, plci->c_ind_mask_table));
plci->State = INC_CON_PENDING;
plci->call_dir = (plci->call_dir & ~(CALL_DIR_OUT | CALL_DIR_ORIGINATE)) |
CALL_DIR_IN | CALL_DIR_ANSWER;
@ -5750,10 +5625,9 @@ static void sig_ind(PLCI *plci)
SendMultiIE(plci, Id, multi_pi_parms, PI, 0x210, true));
}
}
clear_c_ind_mask_bit(plci, MAX_APPL);
dump_c_ind_mask(plci);
dbug(1, dprintf("c_ind_mask =%*pb", MAX_APPL, plci->c_ind_mask_table));
}
if (c_ind_mask_empty(plci)) {
if (bitmap_empty(plci->c_ind_mask_table, MAX_APPL)) {
sig_req(plci, HANGUP, 0);
send_req(plci);
plci->State = IDLE;
@ -5994,13 +5868,13 @@ static void sig_ind(PLCI *plci)
break;
case RESUME:
clear_c_ind_mask_bit(plci, (word)(plci->appl->Id - 1));
__clear_bit(plci->appl->Id - 1, plci->c_ind_mask_table);
PUT_WORD(&resume_cau[4], GOOD);
sendf(plci->appl, _FACILITY_I, Id, 0, "ws", (word)3, resume_cau);
break;
case SUSPEND:
clear_c_ind_mask(plci);
bitmap_zero(plci->c_ind_mask_table, MAX_APPL);
if (plci->NL.Id && !plci->nl_remove_id) {
mixer_remove(plci);
@ -6037,15 +5911,12 @@ static void sig_ind(PLCI *plci)
if (plci->State == INC_CON_PENDING || plci->State == INC_CON_ALERT)
{
for (i = 0; i < max_appl; i++)
{
if (test_c_ind_mask_bit(plci, i))
sendf(&application[i], _DISCONNECT_I, Id, 0, "w", 0);
}
for_each_set_bit(i, plci->c_ind_mask_table, max_appl)
sendf(&application[i], _DISCONNECT_I, Id, 0, "w", 0);
}
else
{
clear_c_ind_mask(plci);
bitmap_zero(plci->c_ind_mask_table, MAX_APPL);
}
if (!plci->appl)
{
@ -6055,7 +5926,7 @@ static void sig_ind(PLCI *plci)
a->listen_active--;
}
plci->State = INC_DIS_PENDING;
if (c_ind_mask_empty(plci))
if (bitmap_empty(plci->c_ind_mask_table, MAX_APPL))
{
plci->State = IDLE;
if (plci->NL.Id && !plci->nl_remove_id)
@ -6341,14 +6212,10 @@ static void SendInfo(PLCI *plci, dword Id, byte **parms, byte iesent)
|| Info_Number == DSP
|| Info_Number == UUI)
{
for (j = 0; j < max_appl; j++)
{
if (test_c_ind_mask_bit(plci, j))
{
dbug(1, dprintf("Ovl_Ind"));
iesent = true;
sendf(&application[j], _INFO_I, Id, 0, "wS", Info_Number, Info_Element);
}
for_each_set_bit(j, plci->c_ind_mask_table, max_appl) {
dbug(1, dprintf("Ovl_Ind"));
iesent = true;
sendf(&application[j], _INFO_I, Id, 0, "wS", Info_Number, Info_Element);
}
}
} /* all other signalling states */
@ -6416,14 +6283,10 @@ static byte SendMultiIE(PLCI *plci, dword Id, byte **parms, byte ie_type,
}
else if (!plci->appl && Info_Number)
{ /* overlap receiving broadcast */
for (j = 0; j < max_appl; j++)
{
if (test_c_ind_mask_bit(plci, j))
{
iesent = true;
dbug(1, dprintf("Mlt_Ovl_Ind"));
sendf(&application[j] , _INFO_I, Id, 0, "wS", Info_Number, Info_Element);
}
for_each_set_bit(j, plci->c_ind_mask_table, max_appl) {
iesent = true;
dbug(1, dprintf("Mlt_Ovl_Ind"));
sendf(&application[j] , _INFO_I, Id, 0, "wS", Info_Number, Info_Element);
}
} /* all other signalling states */
else if (Info_Number
@ -7270,7 +7133,6 @@ static word get_plci(DIVA_CAPI_ADAPTER *a)
word i, j;
PLCI *plci;
dump_plcis(a);
for (i = 0; i < a->max_plci && a->plci[i].Id; i++);
if (i == a->max_plci) {
dbug(1, dprintf("get_plci: out of PLCIs"));
@ -7321,8 +7183,8 @@ static word get_plci(DIVA_CAPI_ADAPTER *a)
plci->ncci_ring_list = 0;
for (j = 0; j < MAX_CHANNELS_PER_PLCI; j++) plci->inc_dis_ncci_table[j] = 0;
clear_c_ind_mask(plci);
set_group_ind_mask(plci);
bitmap_zero(plci->c_ind_mask_table, MAX_APPL);
bitmap_fill(plci->group_optimization_mask_table, MAX_APPL);
plci->fax_connect_info_length = 0;
plci->nsf_control_bits = 0;
plci->ncpi_state = 0x00;
@ -9373,10 +9235,10 @@ word CapiRelease(word Id)
if (plci->State == INC_CON_PENDING
|| plci->State == INC_CON_ALERT)
{
if (test_c_ind_mask_bit(plci, (word)(Id - 1)))
if (test_bit(Id - 1, plci->c_ind_mask_table))
{
clear_c_ind_mask_bit(plci, (word)(Id - 1));
if (c_ind_mask_empty(plci))
__clear_bit(Id - 1, plci->c_ind_mask_table);
if (bitmap_empty(plci->c_ind_mask_table, MAX_APPL))
{
sig_req(plci, HANGUP, 0);
send_req(plci);
@ -9384,10 +9246,10 @@ word CapiRelease(word Id)
}
}
}
if (test_c_ind_mask_bit(plci, (word)(Id - 1)))
if (test_bit(Id - 1, plci->c_ind_mask_table))
{
clear_c_ind_mask_bit(plci, (word)(Id - 1));
if (c_ind_mask_empty(plci))
__clear_bit(Id - 1, plci->c_ind_mask_table);
if (bitmap_empty(plci->c_ind_mask_table, MAX_APPL))
{
if (!plci->appl)
{
@ -9452,7 +9314,7 @@ word CapiRelease(word Id)
static word plci_remove_check(PLCI *plci)
{
if (!plci) return true;
if (!plci->NL.Id && c_ind_mask_empty(plci))
if (!plci->NL.Id && bitmap_empty(plci->c_ind_mask_table, MAX_APPL))
{
if (plci->Sig.Id == 0xff)
plci->Sig.Id = 0;
@ -14735,7 +14597,8 @@ static void group_optimization(DIVA_CAPI_ADAPTER *a, PLCI *plci)
word appl_number_group_type[MAX_APPL];
PLCI *auxplci;
set_group_ind_mask(plci); /* all APPLs within this inc. call are allowed to dial in */
/* all APPLs within this inc. call are allowed to dial in */
bitmap_fill(plci->group_optimization_mask_table, MAX_APPL);
if (!a->group_optimization_enabled)
{
@ -14771,13 +14634,12 @@ static void group_optimization(DIVA_CAPI_ADAPTER *a, PLCI *plci)
if (a->plci[k].Id)
{
auxplci = &a->plci[k];
if (auxplci->appl == &application[i]) /* application has a busy PLCI */
{
if (auxplci->appl == &application[i]) {
/* application has a busy PLCI */
busy = true;
dbug(1, dprintf("Appl 0x%x is busy", i + 1));
}
else if (test_c_ind_mask_bit(auxplci, i)) /* application has an incoming call pending */
{
} else if (test_bit(i, plci->c_ind_mask_table)) {
/* application has an incoming call pending */
busy = true;
dbug(1, dprintf("Appl 0x%x has inc. call pending", i + 1));
}
@ -14826,7 +14688,8 @@ static void group_optimization(DIVA_CAPI_ADAPTER *a, PLCI *plci)
if (appl_number_group_type[i] == appl_number_group_type[j])
{
dbug(1, dprintf("Appl 0x%x is member of group 0x%x, no call", j + 1, appl_number_group_type[j]));
clear_group_ind_mask_bit(plci, j); /* disable call on other group members */
/* disable call on other group members */
__clear_bit(j, plci->group_optimization_mask_table);
appl_number_group_type[j] = 0; /* remove disabled group member from group list */
}
}
@ -14834,7 +14697,7 @@ static void group_optimization(DIVA_CAPI_ADAPTER *a, PLCI *plci)
}
else /* application should not get a call */
{
clear_group_ind_mask_bit(plci, i);
__clear_bit(i, plci->group_optimization_mask_table);
}
}