From 6bd4e1e4d6023f4da069fd68729c502cc4e6dfd0 Mon Sep 17 00:00:00 2001
From: "Kashyap, Desai" <kashyap.desai@lsi.com>
Date: Fri, 7 Aug 2009 19:37:14 +0530
Subject: [PATCH] [SCSI] mpt2sas: fix infinite loop inside config request
This restriction is introduced just to avoid loop of
config_request. Retry must be limited so we have restricted
config request to maximum 2 times.
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
---
drivers/scsi/mpt2sas/mpt2sas_config.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/scsi/mpt2sas/mpt2sas_config.c b/drivers/scsi/mpt2sas/mpt2sas_config.c
index 58cfb97846f7..1c6658c60239 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_config.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_config.c
@@ -247,6 +247,12 @@ _config_request(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigRequest_t
retry_count = 0;
retry_config:
+ if (retry_count) {
+ if (retry_count > 2) /* attempt only 2 retries */
+ return -EFAULT;
+ printk(MPT2SAS_INFO_FMT "%s: attempting retry (%d)\n",
+ ioc->name, __func__, retry_count);
+ }
wait_state_count = 0;
ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
while (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {