[PATCH v6 2/7] PCI: Expose reset_type to users of pci_reset_function()

[Sinan Kaya <okaya@kernel.org>]

Looking to have more control between the users of the API vs. what the API
can do internally. The new reset_type tells the PCI core about the bounds
of the request.

PCI_RESET_ANY was chosen to match the existing behavior in the code.
Current pci_reset_function() tries all reset types one by one until
it returns 0. By specifying PCI_RESET_ANY, we get the same behavior like
before.

Signed-off-by: Sinan Kaya <okaya@kernel.org>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> (drivers/hid/intel-ish-hid/ipc/ipc.c)
---
 drivers/hid/intel-ish-hid/ipc/ipc.c             | 2 +-
 drivers/misc/genwqe/card_base.c                 | 2 +-
 drivers/net/ethernet/qlogic/qlcnic/qlcnic_ctx.c | 2 +-
 drivers/net/ethernet/sfc/mcdi.c                 | 2 +-
 drivers/pci/pci-sysfs.c                         | 2 +-
 drivers/pci/pci.c                               | 5 +++--
 include/linux/pci.h                             | 2 +-
 7 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/hid/intel-ish-hid/ipc/ipc.c b/drivers/hid/intel-ish-hid/ipc/ipc.c
index bfbca7ec54ce..18312969f1b3 100644
--- a/drivers/hid/intel-ish-hid/ipc/ipc.c
+++ b/drivers/hid/intel-ish-hid/ipc/ipc.c
@@ -754,7 +754,7 @@ static int _ish_hw_reset(struct ishtp_device *dev)
 	if (!pdev)
 		return	-ENODEV;
 
-	rv = pci_reset_function(pdev);
+	rv = pci_reset_function(pdev, PCI_RESET_ANY);
 	if (!rv)
 		dev->dev_state = ISHTP_DEV_RESETTING;
 
diff --git a/drivers/misc/genwqe/card_base.c b/drivers/misc/genwqe/card_base.c
index c7cd3675bcd1..cc78ef28ee38 100644
--- a/drivers/misc/genwqe/card_base.c
+++ b/drivers/misc/genwqe/card_base.c
@@ -201,7 +201,7 @@ static int genwqe_bus_reset(struct genwqe_dev *cd)
 	 * restored by the pci_reset_function().
 	 */
 	dev_dbg(&pci_dev->dev, "[%s] pci_reset function ...\n", __func__);
-	rc = pci_reset_function(pci_dev);
+	rc = pci_reset_function(pci_dev, PCI_RESET_ANY);
 	if (rc) {
 		dev_err(&pci_dev->dev,
 			"[%s] err: failed reset func (rc %d)\n", __func__, rc);
diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ctx.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ctx.c
index d344e9d43832..bb737725f175 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ctx.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ctx.c
@@ -629,7 +629,7 @@ int qlcnic_fw_create_ctx(struct qlcnic_adapter *dev)
 	int i, err, ring;
 
 	if (dev->flags & QLCNIC_NEED_FLR) {
-		pci_reset_function(dev->pdev);
+		pci_reset_function(dev->pdev, PCI_RESET_ANY);
 		dev->flags &= ~QLCNIC_NEED_FLR;
 	}
 
diff --git a/drivers/net/ethernet/sfc/mcdi.c b/drivers/net/ethernet/sfc/mcdi.c
index dfad93fca0a6..7f95e17b8a48 100644
--- a/drivers/net/ethernet/sfc/mcdi.c
+++ b/drivers/net/ethernet/sfc/mcdi.c
@@ -1862,7 +1862,7 @@ int efx_mcdi_reset(struct efx_nic *efx, enum reset_type method)
 
 	/* If MCDI is down, we can't handle_assertion */
 	if (method == RESET_TYPE_MCDI_TIMEOUT) {
-		rc = pci_reset_function(efx->pci_dev);
+		rc = pci_reset_function(efx->pci_dev, PCI_RESET_ANY);
 		if (rc)
 			return rc;
 		/* Re-enable polled MCDI completion */
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 9ecfe13157c0..9569664ec4b2 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -1449,7 +1449,7 @@ static ssize_t reset_store(struct device *dev, struct device_attribute *attr,
 		return -EINVAL;
 
 	pm_runtime_get_sync(dev);
-	result = pci_reset_function(pdev);
+	result = pci_reset_function(pdev, PCI_RESET_ANY);
 	pm_runtime_put(dev);
 	if (result < 0)
 		return result;
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index e292ea589d3e..66f102b7ed4e 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -4780,6 +4780,7 @@ int pci_probe_reset_function(struct pci_dev *dev)
 /**
  * pci_reset_function - quiesce and reset a PCI device function
  * @dev: PCI device to reset
+ * @reset_type: reset type to apply
  *
  * Some devices allow an individual function to be reset without affecting
  * other functions in the same device.  The PCI device must be responsive
@@ -4793,7 +4794,7 @@ int pci_probe_reset_function(struct pci_dev *dev)
  * Returns 0 if the device function was successfully reset or negative if the
  * device doesn't support resetting a single function.
  */
-int pci_reset_function(struct pci_dev *dev)
+int pci_reset_function(struct pci_dev *dev, u32 reset_type)
 {
 	int rc;
 
@@ -4803,7 +4804,7 @@ int pci_reset_function(struct pci_dev *dev)
 	pci_dev_lock(dev);
 	pci_dev_save_and_disable(dev);
 
-	rc = __pci_reset_function_locked(dev, PCI_RESET_ANY);
+	rc = __pci_reset_function_locked(dev, reset_type);
 
 	pci_dev_restore(dev);
 	pci_dev_unlock(dev);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 7ace46b3e479..927e60660b96 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1168,7 +1168,7 @@ void pcie_print_link_status(struct pci_dev *dev);
 bool pcie_has_flr(struct pci_dev *dev);
 int pcie_flr(struct pci_dev *dev);
 int __pci_reset_function_locked(struct pci_dev *dev, u32 reset_type);
-int pci_reset_function(struct pci_dev *dev);
+int pci_reset_function(struct pci_dev *dev, u32 reset_type);
 int pci_reset_function_locked(struct pci_dev *dev);
 int pci_try_reset_function(struct pci_dev *dev);
 int pci_probe_reset_slot(struct pci_slot *slot);
-- 
2.19.0