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authorMichael Reed <mdr@sgi.com>2006-05-24 15:07:40 -0500
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2006-06-10 16:00:03 -0500
commit419835e285c3e39cd62c8c8426da0aebea9cd89f (patch)
treee550176245f09598ccf7ffff915524ff07d75c88
parentca2f938efe71ca48cbc689db4df8d4f04b5d8f07 (diff)
[SCSI] mptfc: fix fibre channel infinite request/response loop
While doing board reset testing I was able to put the system in an infinite request/response loop between the scsi layer and mptscsih_qcmd() by aborting the reset. This patch installs a "SETUP RESET" handler which calls fc_remote_port_delete() for all registered rports. This blocks the target which prevents the loop. Additionally, should the reset fail to complete, the transport will now terminate i/o to the target. Signed-off-by: Michael Reed <mdr@sgi.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
-rw-r--r--drivers/message/fusion/mptbase.h1
-rw-r--r--drivers/message/fusion/mptfc.c36
2 files changed, 35 insertions, 2 deletions
diff --git a/drivers/message/fusion/mptbase.h b/drivers/message/fusion/mptbase.h
index 29f6b986946..6d36ff5ee72 100644
--- a/drivers/message/fusion/mptbase.h
+++ b/drivers/message/fusion/mptbase.h
@@ -635,6 +635,7 @@ typedef struct _MPT_ADAPTER
int num_ports;
struct work_struct mptscsih_persistTask;
+ struct work_struct fc_setup_reset_work;
struct list_head fc_rports;
spinlock_t fc_rescan_work_lock;
int fc_rescan_work_count;
diff --git a/drivers/message/fusion/mptfc.c b/drivers/message/fusion/mptfc.c
index 918aca0146f..770df553047 100644
--- a/drivers/message/fusion/mptfc.c
+++ b/drivers/message/fusion/mptfc.c
@@ -580,10 +580,10 @@ mptfc_qcmd(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
#ifdef DMPT_DEBUG_FC
if (unlikely(err)) {
dfcprintk ((MYIOC_s_INFO_FMT
- "mptfc_qcmd.%d: %d:%d, mptscsih_qcmd returns non-zero.\n",
+ "mptfc_qcmd.%d: %d:%d, mptscsih_qcmd returns non-zero, (%x).\n",
((MPT_SCSI_HOST *) SCpnt->device->host->hostdata)->ioc->name,
((MPT_SCSI_HOST *) SCpnt->device->host->hostdata)->ioc->sh->host_no,
- SCpnt->device->id,SCpnt->device->lun));
+ SCpnt->device->id,SCpnt->device->lun,err));
}
#endif
return err;
@@ -873,6 +873,31 @@ mptfc_init_host_attr(MPT_ADAPTER *ioc,int portnum)
}
static void
+mptfc_setup_reset(void *arg)
+{
+ MPT_ADAPTER *ioc = (MPT_ADAPTER *)arg;
+ u64 pn;
+ struct mptfc_rport_info *ri;
+
+ /* reset about to happen, delete (block) all rports */
+ list_for_each_entry(ri, &ioc->fc_rports, list) {
+ if (ri->flags & MPT_RPORT_INFO_FLAGS_REGISTERED) {
+ ri->flags &= ~MPT_RPORT_INFO_FLAGS_REGISTERED;
+ fc_remote_port_delete(ri->rport); /* won't sleep */
+ ri->rport = NULL;
+
+ pn = (u64)ri->pg0.WWPN.High << 32 |
+ (u64)ri->pg0.WWPN.Low;
+ dfcprintk ((MYIOC_s_INFO_FMT
+ "mptfc_setup_reset.%d: %llx deleted\n",
+ ioc->name,
+ ioc->sh->host_no,
+ (unsigned long long)pn));
+ }
+ }
+}
+
+static void
mptfc_rescan_devices(void *arg)
{
MPT_ADAPTER *ioc = (MPT_ADAPTER *)arg;
@@ -999,6 +1024,7 @@ mptfc_probe(struct pci_dev *pdev, const struct pci_device_id *id)
spin_lock_init(&ioc->fc_rescan_work_lock);
INIT_WORK(&ioc->fc_rescan_work, mptfc_rescan_devices,(void *)ioc);
+ INIT_WORK(&ioc->fc_setup_reset_work, mptfc_setup_reset, (void *)ioc);
spin_lock_irqsave(&ioc->FreeQlock, flags);
@@ -1221,6 +1247,12 @@ mptfc_ioc_reset(MPT_ADAPTER *ioc, int reset_phase)
reset_phase==MPT_IOC_PRE_RESET ? "pre" : "post")));
if (reset_phase == MPT_IOC_SETUP_RESET) {
+ spin_lock_irqsave(&ioc->fc_rescan_work_lock, flags);
+ if (ioc->fc_rescan_work_q) {
+ queue_work(ioc->fc_rescan_work_q,
+ &ioc->fc_setup_reset_work);
+ }
+ spin_unlock_irqrestore(&ioc->fc_rescan_work_lock, flags);
}
else if (reset_phase == MPT_IOC_PRE_RESET) {