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authorMark Haverkamp <markh@osdl.org>2006-08-03 08:03:07 -0700
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2006-08-19 13:33:45 -0700
commit90ee346651524eb275405d410f5d3bb6765a2d93 (patch)
treeff78b321da9aafb44dfbe593f0c7dbe7f88f053e /drivers/scsi/aacraid/aachba.c
parent8c23cd7457151fc8ace79ec700a8aeaa9fc5b3d9 (diff)
[SCSI] aacraid: Check for unlikely errors
Received from Mark Salyzyn The enclosed patch cleans up some code fragments, adds some paranoia (unproven causes of potential driver failures). Signed-off-by: Mark Haverkamp <markh@osdl.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/aacraid/aachba.c')
-rw-r--r--drivers/scsi/aacraid/aachba.c15
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/scsi/aacraid/aachba.c b/drivers/scsi/aacraid/aachba.c
index 83b5c7d085f..699351c15cc 100644
--- a/drivers/scsi/aacraid/aachba.c
+++ b/drivers/scsi/aacraid/aachba.c
@@ -489,6 +489,8 @@ int aac_probe_container(struct aac_dev *dev, int cid)
unsigned instance;
fsa_dev_ptr = dev->fsa_dev;
+ if (!fsa_dev_ptr)
+ return -ENOMEM;
instance = dev->scsi_host_ptr->unique_id;
if (!(fibptr = aac_fib_alloc(dev)))
@@ -1392,6 +1394,7 @@ static int aac_synchronize(struct scsi_cmnd *scsicmd, int cid)
struct scsi_cmnd *cmd;
struct scsi_device *sdev = scsicmd->device;
int active = 0;
+ struct aac_dev *aac;
unsigned long flags;
/*
@@ -1413,11 +1416,11 @@ static int aac_synchronize(struct scsi_cmnd *scsicmd, int cid)
if (active)
return SCSI_MLQUEUE_DEVICE_BUSY;
+ aac = (struct aac_dev *)scsicmd->device->host->hostdata;
/*
* Allocate and initialize a Fib
*/
- if (!(cmd_fibcontext =
- aac_fib_alloc((struct aac_dev *)scsicmd->device->host->hostdata)))
+ if (!(cmd_fibcontext = aac_fib_alloc(aac)))
return SCSI_MLQUEUE_HOST_BUSY;
aac_fib_init(cmd_fibcontext);
@@ -1470,6 +1473,8 @@ int aac_scsi_cmd(struct scsi_cmnd * scsicmd)
struct aac_dev *dev = (struct aac_dev *)host->hostdata;
struct fsa_dev_info *fsa_dev_ptr = dev->fsa_dev;
+ if (fsa_dev_ptr == NULL)
+ return -1;
/*
* If the bus, id or lun is out of range, return fail
* Test does not apply to ID 16, the pseudo id for the controller
@@ -1782,6 +1787,8 @@ static int query_disk(struct aac_dev *dev, void __user *arg)
struct fsa_dev_info *fsa_dev_ptr;
fsa_dev_ptr = dev->fsa_dev;
+ if (!fsa_dev_ptr)
+ return -ENODEV;
if (copy_from_user(&qd, arg, sizeof (struct aac_query_disk)))
return -EFAULT;
if (qd.cnum == -1)
@@ -1843,6 +1850,10 @@ static int delete_disk(struct aac_dev *dev, void __user *arg)
struct fsa_dev_info *fsa_dev_ptr;
fsa_dev_ptr = dev->fsa_dev;
+ if (!fsa_dev_ptr)
+ return -ENODEV;
+ if (!fsa_dev_ptr)
+ return -ENODEV;
if (copy_from_user(&dd, arg, sizeof (struct aac_delete_disk)))
return -EFAULT;