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authorManish Chopra <manishc@marvell.com>2023-08-16 20:37:11 +0530
committerJakub Kicinski <kuba@kernel.org>2023-08-17 11:55:39 -0700
commit2eb9625a3a32251ecea470cd576659a3a03b4e59 (patch)
treea23fa32d91e5423a590c6179beadcb3d251c8cda
parentb616be6b97688f2f2bd7c4a47ab32f27f94fb2a9 (diff)
qede: fix firmware halt over suspend and resume
While performing certain power-off sequences, PCI drivers are called to suspend and resume their underlying devices through PCI PM (power management) interface. However this NIC hardware does not support PCI PM suspend/resume operations so system wide suspend/resume leads to bad MFW (management firmware) state which causes various follow-up errors in driver when communicating with the device/firmware afterwards. To fix this driver implements PCI PM suspend handler to indicate unsupported operation to the PCI subsystem explicitly, thus avoiding system to go into suspended/standby mode. Without this fix device/firmware does not recover unless system is power cycled. Fixes: 2950219d87b0 ("qede: Add basic network device support") Signed-off-by: Manish Chopra <manishc@marvell.com> Signed-off-by: Alok Prasad <palok@marvell.com> Reviewed-by: John Meneghini <jmeneghi@redhat.com> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://lore.kernel.org/r/20230816150711.59035-1-manishc@marvell.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-rw-r--r--drivers/net/ethernet/qlogic/qede/qede_main.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/net/ethernet/qlogic/qede/qede_main.c b/drivers/net/ethernet/qlogic/qede/qede_main.c
index 4b004a728190..99df00c30b8c 100644
--- a/drivers/net/ethernet/qlogic/qede/qede_main.c
+++ b/drivers/net/ethernet/qlogic/qede/qede_main.c
@@ -176,6 +176,15 @@ static int qede_sriov_configure(struct pci_dev *pdev, int num_vfs_param)
}
#endif
+static int __maybe_unused qede_suspend(struct device *dev)
+{
+ dev_info(dev, "Device does not support suspend operation\n");
+
+ return -EOPNOTSUPP;
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(qede_pm_ops, qede_suspend, NULL);
+
static const struct pci_error_handlers qede_err_handler = {
.error_detected = qede_io_error_detected,
};
@@ -190,6 +199,7 @@ static struct pci_driver qede_pci_driver = {
.sriov_configure = qede_sriov_configure,
#endif
.err_handler = &qede_err_handler,
+ .driver.pm = &qede_pm_ops,
};
static struct qed_eth_cb_ops qede_ll_ops = {