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SubjectRe: Top stack (l)users
On Wed, Mar 05, 2003 at 09:21:57PM +0100, J?rn Engel wrote:

> And the winner is drivers/scsi/qlogicfc.c.

Ugh, I tackled that ~6 months back for 2.4 but never got
anyone to test my changes (I don't have hardware).

Someone want to try out the following diff with a card ?
(Still applies to 2.5 with offsets..)

Dave

diff -urpN --exclude-from=/home/davej/.exclude linux-2.4.19/drivers/scsi/qlogicfc.c linux-2.4.19-dj/drivers/scsi/qlogicfc.c
--- linux-2.4.19/drivers/scsi/qlogicfc.c 2002-09-16 15:26:49.000000000 +0100
+++ linux-2.4.19-dj/drivers/scsi/qlogicfc.c 2002-09-18 15:01:51.000000000 +0100
@@ -650,6 +650,7 @@ struct isp2x00_hostdata {
u_char queued;
u_char host_id;
struct timer_list explore_timer;
+ struct id_name_map tempmap[QLOGICFC_MAX_ID + 1];
};


@@ -845,13 +846,12 @@ static int isp2x00_make_portdb(struct Sc

short param[8];
int i, j;
- struct id_name_map temp[QLOGICFC_MAX_ID + 1];
struct isp2x00_hostdata *hostdata;

isp2x00_disable_irqs(host);

- memset(temp, 0, sizeof(temp));
hostdata = (struct isp2x00_hostdata *) host->hostdata;
+ memset(hostdata->tempmap, 0, sizeof(hostdata->tempmap));

#if ISP2x00_FABRIC
for (i = 0x81; i < QLOGICFC_MAX_ID; i++) {
@@ -877,15 +877,15 @@ static int isp2x00_make_portdb(struct Sc
if (param[0] == MBOX_COMMAND_COMPLETE) {
hostdata->port_id = ((u_int) param[3]) << 16;
hostdata->port_id |= param[2];
- temp[0].loop_id = param[1];
- temp[0].wwn = hostdata->wwn;
+ hostdata->tempmap[0].loop_id = param[1];
+ hostdata->tempmap[0].wwn = hostdata->wwn;
}
else {
printk("qlogicfc%d : error getting scsi id.\n", hostdata->host_id);
}

for (i = 0; i <=QLOGICFC_MAX_ID; i++)
- temp[i].loop_id = temp[0].loop_id;
+ hostdata->tempmap[i].loop_id = hostdata->tempmap[0].loop_id;

for (i = 0, j = 1; i <= QLOGICFC_MAX_LOOP_ID; i++) {
param[0] = MBOX_GET_PORT_NAME;
@@ -894,15 +894,15 @@ static int isp2x00_make_portdb(struct Sc
isp2x00_mbox_command(host, param);

if (param[0] == MBOX_COMMAND_COMPLETE) {
- temp[j].loop_id = i;
- temp[j].wwn = ((u64) (param[2] & 0xff)) << 56;
- temp[j].wwn |= ((u64) ((param[2] >> 8) & 0xff)) << 48;
- temp[j].wwn |= ((u64) (param[3] & 0xff)) << 40;
- temp[j].wwn |= ((u64) ((param[3] >> 8) & 0xff)) << 32;
- temp[j].wwn |= ((u64) (param[6] & 0xff)) << 24;
- temp[j].wwn |= ((u64) ((param[6] >> 8) & 0xff)) << 16;
- temp[j].wwn |= ((u64) (param[7] & 0xff)) << 8;
- temp[j].wwn |= ((u64) ((param[7] >> 8) & 0xff));
+ hostdata->tempmap[j].loop_id = i;
+ hostdata->tempmap[j].wwn = ((u64) (param[2] & 0xff)) << 56;
+ hostdata->tempmap[j].wwn |= ((u64) ((param[2] >> 8) & 0xff)) << 48;
+ hostdata->tempmap[j].wwn |= ((u64) (param[3] & 0xff)) << 40;
+ hostdata->tempmap[j].wwn |= ((u64) ((param[3] >> 8) & 0xff)) << 32;
+ hostdata->tempmap[j].wwn |= ((u64) (param[6] & 0xff)) << 24;
+ hostdata->tempmap[j].wwn |= ((u64) ((param[6] >> 8) & 0xff)) << 16;
+ hostdata->tempmap[j].wwn |= ((u64) (param[7] & 0xff)) << 8;
+ hostdata->tempmap[j].wwn |= ((u64) ((param[7] >> 8) & 0xff));

j++;

@@ -911,33 +911,33 @@ static int isp2x00_make_portdb(struct Sc


#if ISP2x00_FABRIC
- isp2x00_init_fabric(host, temp, j);
+ isp2x00_init_fabric(host, hostdata->tempmap, j);
#endif

for (i = 0; i <= QLOGICFC_MAX_ID; i++) {
- if (temp[i].wwn != hostdata->port_db[i].wwn) {
+ if (hostdata->tempmap[i].wwn != hostdata->port_db[i].wwn) {
for (j = 0; j <= QLOGICFC_MAX_ID; j++) {
- if (temp[j].wwn == hostdata->port_db[i].wwn) {
- hostdata->port_db[i].loop_id = temp[j].loop_id;
+ if (hostdata->tempmap[j].wwn == hostdata->port_db[i].wwn) {
+ hostdata->port_db[i].loop_id = hostdata->tempmap[j].loop_id;
break;
}
}
if (j == QLOGICFC_MAX_ID + 1)
- hostdata->port_db[i].loop_id = temp[0].loop_id;
+ hostdata->port_db[i].loop_id = hostdata->tempmap[0].loop_id;

for (j = 0; j <= QLOGICFC_MAX_ID; j++) {
- if (hostdata->port_db[j].wwn == temp[i].wwn || !hostdata->port_db[j].wwn) {
+ if (hostdata->port_db[j].wwn == hostdata->tempmap[i].wwn || !hostdata->port_db[j].wwn) {
break;
}
}
if (j == QLOGICFC_MAX_ID + 1)
printk("qlogicfc%d : Too many scsi devices, no more room in port map.\n", hostdata->host_id);
if (!hostdata->port_db[j].wwn) {
- hostdata->port_db[j].loop_id = temp[i].loop_id;
- hostdata->port_db[j].wwn = temp[i].wwn;
+ hostdata->port_db[j].loop_id = hostdata->tempmap[i].loop_id;
+ hostdata->port_db[j].wwn = hostdata->tempmap[i].wwn;
}
} else
- hostdata->port_db[i].loop_id = temp[i].loop_id;
+ hostdata->port_db[i].loop_id = hostdata->tempmap[i].loop_id;

}

-
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