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-rw-r--r--Documentation/scsi/ChangeLog.megaraid25
-rw-r--r--drivers/scsi/megaraid/megaraid_mbox.c59
-rw-r--r--drivers/scsi/megaraid/megaraid_mbox.h7
3 files changed, 71 insertions, 20 deletions
diff --git a/Documentation/scsi/ChangeLog.megaraid b/Documentation/scsi/ChangeLog.megaraid
index 09f6300..c173806 100644
--- a/Documentation/scsi/ChangeLog.megaraid
+++ b/Documentation/scsi/ChangeLog.megaraid
@@ -1,3 +1,28 @@
+Release Date : Mon Apr 11 12:27:22 EST 2006 - Seokmann Ju <sju@lsil.com>
+Current Version : 2.20.4.8 (scsi module), 2.20.2.6 (cmm module)
+Older Version : 2.20.4.7 (scsi module), 2.20.2.6 (cmm module)
+
+1. Fixed a bug in megaraid_reset_handler().
+ Customer reported "Unable to handle kernel NULL pointer dereference
+ at virtual address 00000000" when system goes to reset condition
+ for some reason. It happened randomly.
+ Root Cause: in the megaraid_reset_handler(), there is possibility not
+ returning pending packets in the pend_list if there are multiple
+ pending packets.
+ Fix: Made the change in the driver so that it will return all packets
+ in the pend_list.
+
+2. Added change request.
+ As found in the following URL, rmb() only didn't help the
+ problem. I had to increase the loop counter to 0xFFFFFF. (6 F's)
+ http://marc.theaimsgroup.com/?l=linux-scsi&m=110971060502497&w=2
+
+ I attached a patch for your reference, too.
+ Could you check and get this fix in your driver?
+
+ Best Regards,
+ Jun'ichi Nomura
+
Release Date : Fri Nov 11 12:27:22 EST 2005 - Seokmann Ju <sju@lsil.com>
Current Version : 2.20.4.7 (scsi module), 2.20.2.6 (cmm module)
Older Version : 2.20.4.6 (scsi module), 2.20.2.6 (cmm module)
diff --git a/drivers/scsi/megaraid/megaraid_mbox.c b/drivers/scsi/megaraid/megaraid_mbox.c
index c11e5ce..bec1424 100644
--- a/drivers/scsi/megaraid/megaraid_mbox.c
+++ b/drivers/scsi/megaraid/megaraid_mbox.c
@@ -10,7 +10,7 @@
* 2 of the License, or (at your option) any later version.
*
* FILE : megaraid_mbox.c
- * Version : v2.20.4.7 (Nov 14 2005)
+ * Version : v2.20.4.8 (Apr 11 2006)
*
* Authors:
* Atul Mukker <Atul.Mukker@lsil.com>
@@ -2278,6 +2278,7 @@ megaraid_mbox_dpc(unsigned long devp)
unsigned long flags;
uint8_t c;
int status;
+ uioc_t *kioc;
if (!adapter) return;
@@ -2320,6 +2321,9 @@ megaraid_mbox_dpc(unsigned long devp)
// remove from local clist
list_del_init(&scb->list);
+ kioc = (uioc_t *)scb->gp;
+ kioc->status = 0;
+
megaraid_mbox_mm_done(adapter, scb);
continue;
@@ -2636,6 +2640,7 @@ megaraid_reset_handler(struct scsi_cmnd *scp)
int recovery_window;
int recovering;
int i;
+ uioc_t *kioc;
adapter = SCP2ADAPTER(scp);
raid_dev = ADAP2RAIDDEV(adapter);
@@ -2655,32 +2660,51 @@ megaraid_reset_handler(struct scsi_cmnd *scp)
// Also, reset all the commands currently owned by the driver
spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
-
list_del_init(&scb->list); // from pending list
- con_log(CL_ANN, (KERN_WARNING
- "megaraid: %ld:%d[%d:%d], reset from pending list\n",
- scp->serial_number, scb->sno,
- scb->dev_channel, scb->dev_target));
+ if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: IOCTL packet with %d[%d:%d] being reset\n",
+ scb->sno, scb->dev_channel, scb->dev_target));
- scp->result = (DID_RESET << 16);
- scp->scsi_done(scp);
+ scb->status = -1;
- megaraid_dealloc_scb(adapter, scb);
+ kioc = (uioc_t *)scb->gp;
+ kioc->status = -EFAULT;
+
+ megaraid_mbox_mm_done(adapter, scb);
+ } else {
+ if (scb->scp == scp) { // Found command
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: %ld:%d[%d:%d], reset from pending list\n",
+ scp->serial_number, scb->sno,
+ scb->dev_channel, scb->dev_target));
+ } else {
+ con_log(CL_ANN, (KERN_WARNING
+ "megaraid: IO packet with %d[%d:%d] being reset\n",
+ scb->sno, scb->dev_channel, scb->dev_target));
+ }
+
+ scb->scp->result = (DID_RESET << 16);
+ scb->scp->scsi_done(scb->scp);
+
+ megaraid_dealloc_scb(adapter, scb);
+ }
}
spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
if (adapter->outstanding_cmds) {
con_log(CL_ANN, (KERN_NOTICE
"megaraid: %d outstanding commands. Max wait %d sec\n",
- adapter->outstanding_cmds, MBOX_RESET_WAIT));
+ adapter->outstanding_cmds,
+ (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
}
recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
recovering = adapter->outstanding_cmds;
- for (i = 0; i < recovery_window && adapter->outstanding_cmds; i++) {
+ for (i = 0; i < recovery_window; i++) {
megaraid_ack_sequence(adapter);
@@ -2689,12 +2713,11 @@ megaraid_reset_handler(struct scsi_cmnd *scp)
con_log(CL_ANN, (
"megaraid mbox: Wait for %d commands to complete:%d\n",
adapter->outstanding_cmds,
- MBOX_RESET_WAIT - i));
+ (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
}
// bailout if no recovery happended in reset time
- if ((i == MBOX_RESET_WAIT) &&
- (recovering == adapter->outstanding_cmds)) {
+ if (adapter->outstanding_cmds == 0) {
break;
}
@@ -2918,12 +2941,13 @@ mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
wmb();
WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
- for (i = 0; i < 0xFFFFF; i++) {
+ for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
if (mbox->numstatus != 0xFF) break;
rmb();
+ udelay(MBOX_SYNC_DELAY_200);
}
- if (i == 0xFFFFF) {
+ if (i == MBOX_SYNC_WAIT_CNT) {
// We may need to re-calibrate the counter
con_log(CL_ANN, (KERN_CRIT
"megaraid: fast sync command timed out\n"));
@@ -3475,7 +3499,7 @@ megaraid_cmm_register(adapter_t *adapter)
adp.drvr_data = (unsigned long)adapter;
adp.pdev = adapter->pdev;
adp.issue_uioc = megaraid_mbox_mm_handler;
- adp.timeout = 300;
+ adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
adp.max_kioc = MBOX_MAX_USER_CMDS;
if ((rval = mraid_mm_register_adp(&adp)) != 0) {
@@ -3702,7 +3726,6 @@ megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
unsigned long flags;
kioc = (uioc_t *)scb->gp;
- kioc->status = 0;
mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf;
mbox64->mbox32.status = scb->status;
raw_mbox = (uint8_t *)&mbox64->mbox32;
diff --git a/drivers/scsi/megaraid/megaraid_mbox.h b/drivers/scsi/megaraid/megaraid_mbox.h
index 882fb1a..868fb0e 100644
--- a/drivers/scsi/megaraid/megaraid_mbox.h
+++ b/drivers/scsi/megaraid/megaraid_mbox.h
@@ -21,8 +21,8 @@
#include "megaraid_ioctl.h"
-#define MEGARAID_VERSION "2.20.4.7"
-#define MEGARAID_EXT_VERSION "(Release Date: Mon Nov 14 12:27:22 EST 2005)"
+#define MEGARAID_VERSION "2.20.4.8"
+#define MEGARAID_EXT_VERSION "(Release Date: Mon Apr 11 12:27:22 EST 2006)"
/*
@@ -100,6 +100,9 @@
#define MBOX_BUSY_WAIT 10 // max usec to wait for busy mailbox
#define MBOX_RESET_WAIT 180 // wait these many seconds in reset
#define MBOX_RESET_EXT_WAIT 120 // extended wait reset
+#define MBOX_SYNC_WAIT_CNT 0xFFFF // wait loop index for synchronous mode
+
+#define MBOX_SYNC_DELAY_200 200 // 200 micro-seconds
/*
* maximum transfer that can happen through the firmware commands issued
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