PCI: Use 'pci_channel_state_t' instead of 'enum pci_channel_state'

The method struct pci_error_handlers.error_detected() is defined and
documented as taking an 'enum pci_channel_state' for the second argument,
but most drivers use 'pci_channel_state_t' instead.

This 'pci_channel_state_t' is not a typedef for the enum but a typedef for
a bitwise type in order to have better/stricter typechecking.

Consolidate everything by using 'pci_channel_state_t' in the method's
definition, in the related helpers and in the drivers.

Enforce use of 'pci_channel_state_t' by replacing 'enum pci_channel_state'
with an anonymous 'enum'.

Note: Currently, from a typechecking point of view this patch changes
nothing because only the constants defined by the enum are bitwise, not the
enum itself (sparse doesn't have the notion of 'bitwise enum'). This may
change in some not too far future, hence the patch.

[bhelgaas: squash in
  https://lore.kernel.org/r/20200702162651.49526-3-luc.vanoostenryck@gmail.com
  https://lore.kernel.org/r/20200702162651.49526-4-luc.vanoostenryck@gmail.com]
Link: https://lore.kernel.org/r/20200702162651.49526-2-luc.vanoostenryck@gmail.com
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

15 files changed, 17 insertions, 17 deletions

diff --git a/drivers/block/rsxx/core.c b/drivers/block/rsxx/core.c
index 10f6368117d8..34e937dd6bca 100644
--- a/drivers/block/rsxx/core.c
+++ b/drivers/block/rsxx/core.c
@@ -625,7 +625,7 @@ static int rsxx_eeh_fifo_flush_poll(struct rsxx_cardinfo *card)
 }
 
 static pci_ers_result_t rsxx_error_detected(struct pci_dev *dev,
-					    enum pci_channel_state error)
+					    pci_channel_state_t error)
 {
 	int st;
 
diff --git a/drivers/dma/ioat/init.c b/drivers/dma/ioat/init.c
index 58d13564f88b..089893f2bbb8 100644
--- a/drivers/dma/ioat/init.c
+++ b/drivers/dma/ioat/init.c
@@ -1267,7 +1267,7 @@ static void ioat_resume(struct ioatdma_device *ioat_dma)
 #define DRV_NAME "ioatdma"
 
 static pci_ers_result_t ioat_pcie_error_detected(struct pci_dev *pdev,
-						 enum pci_channel_state error)
+						 pci_channel_state_t error)
 {
 	dev_dbg(&pdev->dev, "%s: PCIe AER error %d\n", DRV_NAME, error);
 
diff --git a/drivers/media/pci/ngene/ngene-cards.c b/drivers/media/pci/ngene/ngene-cards.c
index 6185806a00e0..8bfb3d8ea610 100644
--- a/drivers/media/pci/ngene/ngene-cards.c
+++ b/drivers/media/pci/ngene/ngene-cards.c
@@ -1186,7 +1186,7 @@ MODULE_DEVICE_TABLE(pci, ngene_id_tbl);
 /****************************************************************************/
 
 static pci_ers_result_t ngene_error_detected(struct pci_dev *dev,
-					     enum pci_channel_state state)
+					     pci_channel_state_t state)
 {
 	dev_err(&dev->dev, "PCI error\n");
 	if (state == pci_channel_io_perm_failure)
diff --git a/drivers/misc/genwqe/card_base.c b/drivers/misc/genwqe/card_base.c
index 1dc6c7c5cbce..97b8ecc42383 100644
--- a/drivers/misc/genwqe/card_base.c
+++ b/drivers/misc/genwqe/card_base.c
@@ -1240,7 +1240,7 @@ static void genwqe_remove(struct pci_dev *pci_dev)
  * error is detected.
  */
 static pci_ers_result_t genwqe_err_error_detected(struct pci_dev *pci_dev,
-						 enum pci_channel_state state)
+						 pci_channel_state_t state)
 {
 	struct genwqe_dev *cd;
 
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 5d807c8004f8..f0de2d1842b4 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -15465,7 +15465,7 @@ unmap:
  * remediation.
  **/
 static pci_ers_result_t i40e_pci_error_detected(struct pci_dev *pdev,
-						enum pci_channel_state error)
+						pci_channel_state_t error)
 {
 	struct i40e_pf *pf = pci_get_drvdata(pdev);
 
diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index 082825e3cb39..4dd9226a12df 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -3586,7 +3586,7 @@ static void ice_remove(struct pci_dev *pdev)
  * is in progress.  Allows the driver to gracefully prepare/handle PCI errors.
  */
 static pci_ers_result_t
-ice_pci_err_detected(struct pci_dev *pdev, enum pci_channel_state err)
+ice_pci_err_detected(struct pci_dev *pdev, pci_channel_state_t err)
 {
 	struct ice_pf *pf = pci_get_drvdata(pdev);
 
diff --git a/drivers/net/ethernet/intel/ixgb/ixgb_main.c b/drivers/net/ethernet/intel/ixgb/ixgb_main.c
index b64e91ea3465..00db4b5863b1 100644
--- a/drivers/net/ethernet/intel/ixgb/ixgb_main.c
+++ b/drivers/net/ethernet/intel/ixgb/ixgb_main.c
@@ -82,7 +82,7 @@ static int ixgb_vlan_rx_kill_vid(struct net_device *netdev,
 static void ixgb_restore_vlan(struct ixgb_adapter *adapter);
 
 static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
-                             enum pci_channel_state state);
+                             pci_channel_state_t state);
 static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev);
 static void ixgb_io_resume (struct pci_dev *pdev);
 
@@ -2194,7 +2194,7 @@ ixgb_restore_vlan(struct ixgb_adapter *adapter)
  * a PCI bus error is detected.
  */
 static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev,
-                                               enum pci_channel_state state)
+                                               pci_channel_state_t state)
 {
 	struct net_device *netdev = pci_get_drvdata(pdev);
 	struct ixgb_adapter *adapter = netdev_priv(netdev);
diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c
index 256807c28ff7..ed627aff7b36 100644
--- a/drivers/net/ethernet/sfc/efx.c
+++ b/drivers/net/ethernet/sfc/efx.c
@@ -1519,7 +1519,7 @@ static const struct dev_pm_ops efx_pm_ops = {
  * Stop the software path and request a slot reset.
  */
 static pci_ers_result_t efx_io_error_detected(struct pci_dev *pdev,
-					      enum pci_channel_state state)
+					      pci_channel_state_t state)
 {
 	pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED;
 	struct efx_nic *efx = pci_get_drvdata(pdev);
diff --git a/drivers/net/ethernet/sfc/falcon/efx.c b/drivers/net/ethernet/sfc/falcon/efx.c
index 42bcd34fc508..f8979991970e 100644
--- a/drivers/net/ethernet/sfc/falcon/efx.c
+++ b/drivers/net/ethernet/sfc/falcon/efx.c
@@ -3118,7 +3118,7 @@ static const struct dev_pm_ops ef4_pm_ops = {
  * Stop the software path and request a slot reset.
  */
 static pci_ers_result_t ef4_io_error_detected(struct pci_dev *pdev,
-					      enum pci_channel_state state)
+					      pci_channel_state_t state)
 {
 	pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED;
 	struct ef4_nic *efx = pci_get_drvdata(pdev);
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 6d3f75867106..c6c0c455f59f 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -555,7 +555,7 @@ static inline int pci_dev_specific_disable_acs_redir(struct pci_dev *dev)
 
 /* PCI error reporting and recovery */
 pci_ers_result_t pcie_do_recovery(struct pci_dev *dev,
-			enum pci_channel_state state,
+			pci_channel_state_t state,
 			pci_ers_result_t (*reset_link)(struct pci_dev *pdev));
 
 bool pcie_wait_for_link(struct pci_dev *pdev, bool active);
diff --git a/drivers/pci/pcie/err.c b/drivers/pci/pcie/err.c
index 14bb8f54723e..467686ee2d8b 100644
--- a/drivers/pci/pcie/err.c
+++ b/drivers/pci/pcie/err.c
@@ -46,7 +46,7 @@ static pci_ers_result_t merge_result(enum pci_ers_result orig,
 }
 
 static int report_error_detected(struct pci_dev *dev,
-				 enum pci_channel_state state,
+				 pci_channel_state_t state,
 				 enum pci_ers_result *result)
 {
 	pci_ers_result_t vote;
@@ -147,7 +147,7 @@ out:
 }
 
 pci_ers_result_t pcie_do_recovery(struct pci_dev *dev,
-			enum pci_channel_state state,
+			pci_channel_state_t state,
 			pci_ers_result_t (*reset_link)(struct pci_dev *pdev))
 {
 	pci_ers_result_t status = PCI_ERS_RESULT_CAN_RECOVER;
diff --git a/drivers/pci/pcie/portdrv_pci.c b/drivers/pci/pcie/portdrv_pci.c
index 3acf151ae015..3a3ce40ae1ab 100644
--- a/drivers/pci/pcie/portdrv_pci.c
+++ b/drivers/pci/pcie/portdrv_pci.c
@@ -146,7 +146,7 @@ static void pcie_portdrv_remove(struct pci_dev *dev)
 }
 
 static pci_ers_result_t pcie_portdrv_error_detected(struct pci_dev *dev,
-					enum pci_channel_state error)
+					pci_channel_state_t error)
 {
 	/* Root Port has no impact. Always recovers. */
 	return PCI_ERS_RESULT_CAN_RECOVER;
diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index a308e86a97f1..37f65602b0ec 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -2002,7 +2002,7 @@ static void aac_remove_one(struct pci_dev *pdev)
 }
 
 static pci_ers_result_t aac_pci_error_detected(struct pci_dev *pdev,
-					enum pci_channel_state error)
+					pci_channel_state_t error)
 {
 	struct Scsi_Host *shost = pci_get_drvdata(pdev);
 	struct aac_dev *aac = shost_priv(shost);
diff --git a/drivers/scsi/sym53c8xx_2/sym_glue.c b/drivers/scsi/sym53c8xx_2/sym_glue.c
index 2ca018ce796f..f455243bdb9b 100644
--- a/drivers/scsi/sym53c8xx_2/sym_glue.c
+++ b/drivers/scsi/sym53c8xx_2/sym_glue.c
@@ -1743,7 +1743,7 @@ static void sym2_remove(struct pci_dev *pdev)
  * @state: current state of the PCI slot
  */
 static pci_ers_result_t sym2_io_error_detected(struct pci_dev *pdev,
-                                         enum pci_channel_state state)
+                                         pci_channel_state_t state)
 {
 	/* If slot is permanently frozen, turn everything off */
 	if (state == pci_channel_io_perm_failure) {
diff --git a/drivers/staging/qlge/qlge_main.c b/drivers/staging/qlge/qlge_main.c
index 402edaeffe12..ac30aefe49a1 100644
--- a/drivers/staging/qlge/qlge_main.c
+++ b/drivers/staging/qlge/qlge_main.c
@@ -4678,7 +4678,7 @@ static void ql_eeh_close(struct net_device *ndev)
  * a PCI bus error is detected.
  */
 static pci_ers_result_t qlge_io_error_detected(struct pci_dev *pdev,
-					       enum pci_channel_state state)
+					       pci_channel_state_t state)
 {
 	struct net_device *ndev = pci_get_drvdata(pdev);
 	struct ql_adapter *qdev = netdev_priv(ndev);