mpt3sas: Abort initialization if no memory I/O resources detected

Commit Message

Timothy Pearson June 23, 2015, 7:32 p.m. UTC

The mpt3sas driver crashes if the BIOS does not set up at least one
memory I/O resource.  This failure can happen if the device is too
slow to respond during POST and is missed by the BIOS, but Linux
then detects the device later in the boot process.

Signed-off-by: Timothy Pearson <[e-mail]>
---
 drivers/scsi/mpt3sas/mpt3sas_base.c |    7 +++++++
 1 file changed, 7 insertions(+)

Patch

diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
index 14a781b..4460d48 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
@@ -1865,6 +1865,13 @@  mpt3sas_base_map_resources(struct MPT3SAS_ADAPTER *ioc)
 		}
 	}
 
+	if (ioc->chip == NULL) {
+		printk(MPT3SAS_FMT "unable to map "
+			"adapter memory (resource not found)!\n", ioc->name);
+		r = -EINVAL;
+		goto out_fail;
+	}
+
 	_base_mask_interrupts(ioc);
 
 	r = _base_get_ioc_facts(ioc, CAN_SLEEP);