The code for getting shost and IOC is redundant so
moved that to function "scsih_get_shost_and_ioc".
Also checks for NULL are added to IOC and shost.
Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@xxxxxxxxxxxx>
---
drivers/scsi/mpt3sas/mpt3sas_scsih.c | 98 ++++++++++++++++++++++++++++++------
1 file changed, 82 insertions(+), 16 deletions(-)
diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
index 566a550..f6e92eb 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
@@ -9809,6 +9809,35 @@ _scsih_ir_shutdown(struct MPT3SAS_ADAPTER *ioc)
}
/**
+ * _scsih_get_shost_and_ioc - get shost and ioc
+ * and verify whether they are NULL or not
+ * @pdev: PCI device struct
+ * @shost: address of scsi host pointer
+ * @ioc: address of HBA adapter pointer
+ *
+ * Return zero if *shost and *ioc are not NULL otherwise return error number.
+ */
+static int
+_scsih_get_shost_and_ioc(struct pci_dev *pdev,
+ struct Scsi_Host **shost, struct MPT3SAS_ADAPTER **ioc)
+{
+ *shost = pci_get_drvdata(pdev);
+ if (*shost == NULL) {
+ dev_err(&pdev->dev, "pdev's driver data is null\n");
+ return -ENXIO;
+ }
+
+ *ioc = shost_priv(*shost);
+ if (*ioc == NULL) {
+ dev_err(&pdev->dev, "shost's private data is null\n");
+ return -ENXIO;
+ }
+
+ return 0;
+}
+
+
+/**
* scsih_remove - detach and remove add host
* @pdev: PCI device struct
*
@@ -9816,8 +9845,8 @@ _scsih_ir_shutdown(struct MPT3SAS_ADAPTER *ioc)
*/
static void scsih_remove(struct pci_dev *pdev)
{
- struct Scsi_Host *shost = pci_get_drvdata(pdev);
- struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
+ struct Scsi_Host *shost = NULL;
+ struct MPT3SAS_ADAPTER *ioc = NULL;
struct _sas_port *mpt3sas_port, *next_port;
struct _raid_device *raid_device, *next;
struct MPT3SAS_TARGET *sas_target_priv_data;
@@ -9825,6 +9854,10 @@ static void scsih_remove(struct pci_dev *pdev)
struct workqueue_struct *wq;
unsigned long flags;
+ if (_scsih_get_shost_and_ioc(pdev, &shost, &ioc)) {
+ dev_err(&pdev->dev, "unable to remove device\n");
+ return;
+ }
ioc->remove_host = 1;
mpt3sas_wait_for_commands_to_complete(ioc);
@@ -9898,11 +9931,16 @@ static void scsih_remove(struct pci_dev *pdev)
static void
scsih_shutdown(struct pci_dev *pdev)
{
- struct Scsi_Host *shost = pci_get_drvdata(pdev);
- struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
+ struct Scsi_Host *shost = NULL;
+ struct MPT3SAS_ADAPTER *ioc = NULL;
struct workqueue_struct *wq;
unsigned long flags;
+ if (_scsih_get_shost_and_ioc(pdev, &shost, &ioc)) {
+ dev_err(&pdev->dev, "unable to shutdown device\n");
+ return;
+ }
+
ioc->remove_host = 1;
mpt3sas_wait_for_commands_to_complete(ioc);
@@ -10727,10 +10765,16 @@ out_add_shost_fail:
static int
scsih_suspend(struct pci_dev *pdev, pm_message_t state)
{
- struct Scsi_Host *shost = pci_get_drvdata(pdev);
- struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
+ struct Scsi_Host *shost = NULL;
+ struct MPT3SAS_ADAPTER *ioc = NULL;
pci_power_t device_state;
+ int rc;
+ rc = _scsih_get_shost_and_ioc(pdev, &shost, &ioc);
+ if (rc) {
+ dev_err(&pdev->dev, "unable to suspend device\n");
+ return rc;
+ }
mpt3sas_base_stop_watchdog(ioc);
flush_scheduled_work();
scsi_block_requests(shost);
@@ -10754,11 +10798,17 @@ scsih_suspend(struct pci_dev *pdev, pm_message_t state)
static int
scsih_resume(struct pci_dev *pdev)
{
- struct Scsi_Host *shost = pci_get_drvdata(pdev);
- struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
+ struct Scsi_Host *shost = NULL;
+ struct MPT3SAS_ADAPTER *ioc = NULL;
pci_power_t device_state = pdev->current_state;
int r;
+ r = _scsih_get_shost_and_ioc(pdev, &shost, &ioc);
+ if (r) {
+ dev_err(&pdev->dev, "unable to resume device\n");
+ return r;
+ }
+
pr_info(MPT3SAS_FMT
"pdev=0x%p, slot=%s, previous operating state [D%d]\n",
ioc->name, pdev, pci_name(pdev), device_state);
@@ -10790,9 +10840,13 @@ scsih_resume(struct pci_dev *pdev)
static pci_ers_result_t
scsih_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
{
- struct Scsi_Host *shost = pci_get_drvdata(pdev);
- struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
+ struct Scsi_Host *shost = NULL;
+ struct MPT3SAS_ADAPTER *ioc = NULL;
+ if (_scsih_get_shost_and_ioc(pdev, &shost, &ioc)) {
+ dev_err(&pdev->dev, "device unavailable\n");
+ return PCI_ERS_RESULT_DISCONNECT;
+ }
pr_info(MPT3SAS_FMT "PCI error: detected callback, state(%d)!!\n",
ioc->name, state);
@@ -10827,10 +10881,14 @@ scsih_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
static pci_ers_result_t
scsih_pci_slot_reset(struct pci_dev *pdev)
{
- struct Scsi_Host *shost = pci_get_drvdata(pdev);
- struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
+ struct Scsi_Host *shost = NULL;
+ struct MPT3SAS_ADAPTER *ioc = NULL;
int rc;
+ if (_scsih_get_shost_and_ioc(pdev, &shost, &ioc)) {
+ dev_err(&pdev->dev, "unable to perform slot reset\n");
+ return PCI_ERS_RESULT_DISCONNECT;
+ }
pr_info(MPT3SAS_FMT "PCI error: slot reset callback!!\n",
ioc->name);
@@ -10863,9 +10921,13 @@ scsih_pci_slot_reset(struct pci_dev *pdev)
static void
scsih_pci_resume(struct pci_dev *pdev)
{
- struct Scsi_Host *shost = pci_get_drvdata(pdev);
- struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
+ struct Scsi_Host *shost = NULL;
+ struct MPT3SAS_ADAPTER *ioc = NULL;
+ if (_scsih_get_shost_and_ioc(pdev, &shost, &ioc)) {
+ dev_err(&pdev->dev, "unable to resume device\n");
+ return;
+ }
pr_info(MPT3SAS_FMT "PCI error: resume callback!!\n", ioc->name);
pci_cleanup_aer_uncorrect_error_status(pdev);
@@ -10880,9 +10942,13 @@ scsih_pci_resume(struct pci_dev *pdev)
static pci_ers_result_t
scsih_pci_mmio_enabled(struct pci_dev *pdev)
{
- struct Scsi_Host *shost = pci_get_drvdata(pdev);
- struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
+ struct Scsi_Host *shost = NULL;
+ struct MPT3SAS_ADAPTER *ioc = NULL;
+ if (_scsih_get_shost_and_ioc(pdev, &shost, &ioc)) {
+ dev_err(&pdev->dev, "unable to enable mmio\n");
+ return PCI_ERS_RESULT_DISCONNECT;
+ }
pr_info(MPT3SAS_FMT "PCI error: mmio enabled callback!!\n",
ioc->name);
--
1.8.3.1
