This patch corrects a problem experienced by people using IBM
token-ring adapters with 8K shared-RAM defined. The adapter would
fail to open with a return code of 30, indicating that it was unable
to allocted the requested receive buffers. This patch applies to
2.1.125 and has been submitted to linux-patches.
diff -urN v2.1.125/linux/MAINTAINERS linux/MAINTAINERS
--- v2.1.125/linux/MAINTAINERS Mon Oct 19 20:27:13 1998
+++ linux/MAINTAINERS Mon Oct 19 20:19:39 1998
@@ -642,7 +642,7 @@
TOKEN-RING NETWORK DRIVER
P: Paul Norton
-M: [EMAIL PROTECTED]
+M: [EMAIL PROTECTED]
L: [EMAIL PROTECTED]
L: [EMAIL PROTECTED]
S: Maintained
diff -urN v2.1.125/linux/drivers/net/ibmtr.c linux/drivers/net/ibmtr.c
--- v2.1.125/linux/drivers/net/ibmtr.c Mon Aug 10 20:21:13 1998
+++ linux/drivers/net/ibmtr.c Mon Oct 19 20:18:53 1998
@@ -59,12 +59,13 @@
* Changes by Christopher Turcksin <[EMAIL PROTECTED]>
* + Now compiles ok as a module again.
*
- * Changes by Paul Norton ([EMAIL PROTECTED]) :
+ * Changes by Paul Norton ([EMAIL PROTECTED]) :
* + moved the header manipulation code in tr_tx and tr_rx to
* net/802/tr.c. (July 12 1997)
* + add retry and timeout on open if cable disconnected. (May 5 1998)
* + lifted 2000 byte mtu limit. now depends on shared-RAM size.
* May 25 1998)
+ * + can't allocate 2k recv buff at 8k shared-RAM. (20 October 1998)
*/
#ifdef PCMCIA
@@ -93,8 +94,8 @@
/* version and credits */
static char *version =
-"ibmtr.c: v1.3.57 8/ 7/94 Peter De Schrijver and Mark Swanson\n"
-" v2.1.106 6/22/98 Paul Norton <[EMAIL PROTECTED]>\n";
+"ibmtr.c: v1.3.57 8/ 7/94 Peter De Schrijver and Mark Swanson\n"
+" v2.1.125 10/20/98 Paul Norton <[EMAIL PROTECTED]>\n";
static char pcchannelid[] = {
0x05, 0x00, 0x04, 0x09,
@@ -634,56 +635,56 @@
switch (ti->mapped_ram_size) {
case 16 : /* 8KB shared RAM */
ti->dhb_size4mb = MIN(ti->dhb_size4mb, 2048);
- ti->rbuf_len4 = 2048;
- ti->rbuf_cnt4 = 1;
+ ti->rbuf_len4 = 1032;
+ ti->rbuf_cnt4 = 2;
ti->dhb_size16mb = MIN(ti->dhb_size16mb, 2048);
- ti->rbuf_len16 = 2048;
- ti->rbuf_cnt16 = 1;
+ ti->rbuf_len16 = 1032;
+ ti->rbuf_cnt16 = 2;
break;
case 32 : /* 16KB shared RAM */
ti->dhb_size4mb = MIN(ti->dhb_size4mb, 4464);
- ti->rbuf_len4 = 512;
+ ti->rbuf_len4 = 520;
ti->rbuf_cnt4 = 9;
ti->dhb_size16mb = MIN(ti->dhb_size16mb, 4096);
- ti->rbuf_len16 = 2048;
- ti->rbuf_cnt16 = 2;
+ ti->rbuf_len16 = 1032; /* 1024 usable */
+ ti->rbuf_cnt16 = 4;
break;
case 64 : /* 32KB shared RAM */
ti->dhb_size4mb = MIN(ti->dhb_size4mb, 4464);
- ti->rbuf_len4 = 2048;
- ti->rbuf_cnt4 = 3;
+ ti->rbuf_len4 = 1032;
+ ti->rbuf_cnt4 = 6;
ti->dhb_size16mb = MIN(ti->dhb_size16mb, 10240);
- ti->rbuf_len16 = 2048;
- ti->rbuf_cnt16 = 5;
+ ti->rbuf_len16 = 1032;
+ ti->rbuf_cnt16 = 10;
break;
case 127 : /* 63KB shared RAM */
ti->dhb_size4mb = MIN(ti->dhb_size4mb, 4464);
- ti->rbuf_len4 = 2048;
- ti->rbuf_cnt4 = 3;
+ ti->rbuf_len4 = 1032;
+ ti->rbuf_cnt4 = 6;
ti->dhb_size16mb = MIN(ti->dhb_size16mb, 16384);
- ti->rbuf_len16 = 2048;
- ti->rbuf_cnt16 = 8;
+ ti->rbuf_len16 = 1032;
+ ti->rbuf_cnt16 = 16;
break;
case 128 : /* 64KB shared RAM */
ti->dhb_size4mb = MIN(ti->dhb_size4mb, 4464);
- ti->rbuf_len4 = 2048;
- ti->rbuf_cnt4 = 3;
+ ti->rbuf_len4 = 1032;
+ ti->rbuf_cnt4 = 6;
ti->dhb_size16mb = MIN(ti->dhb_size16mb, 17960);
- ti->rbuf_len16 = 2048;
- ti->rbuf_cnt16 = 9;
+ ti->rbuf_len16 = 1032;
+ ti->rbuf_cnt16 = 18;
break;
default :
ti->dhb_size4mb = 2048;
- ti->rbuf_len4 = 2048;
- ti->rbuf_cnt4 = 1;
+ ti->rbuf_len4 = 1032;
+ ti->rbuf_cnt4 = 2;
ti->dhb_size16mb = 2048;
- ti->rbuf_len16 = 2048;
- ti->rbuf_cnt16 = 1;
+ ti->rbuf_len16 = 1032;
+ ti->rbuf_cnt16 = 2;
break;
}
- ti->maxmtu16 = ti->dhb_size16mb-((ti->rbuf_cnt16)<<3)-TR_HLEN;
- ti->maxmtu4 = ti->dhb_size4mb-((ti->rbuf_cnt4)<<3)-TR_HLEN;
+ ti->maxmtu16 = (ti->rbuf_len16*ti->rbuf_cnt16)-((ti->rbuf_cnt16)<<3)-TR_HLEN;
+ ti->maxmtu4 = (ti->rbuf_len4*ti->rbuf_cnt4)-((ti->rbuf_cnt4)<<3)-TR_HLEN;
DPRINTK("Maximum MTU 16Mbps: %d, 4Mbps: %d\n",
ti->maxmtu16, ti->maxmtu4);
-
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