| Message ID | 20230804115111.84988-1-manishc@marvell.com (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | [net] qede: fix firmware halt over suspend and resume | expand |
+ Yuval Mintz, Sudarsana Kalluru, Paolo Abeni and Eric Dumazet As per the output of ./scripts/get_maintainer.pl --git-min-percent 25 this.patch which is the preferred method to determine the CC list for Networking patches. LKML can, in general, be excluded. On Fri, Aug 04, 2023 at 05:21:11PM +0530, Manish Chopra wrote: > 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. > > Fixes: 2950219d87b0 ("qede: Add basic network device support") > Cc: David Miller <davem@davemloft.net> > Signed-off-by: Manish Chopra <manishc@marvell.com> > Signed-off-by: Alok Prasad <palok@marvell.com> > --- > drivers/net/ethernet/qlogic/qede/qede_main.c | 13 +++++++++++++ > 1 file changed, 13 insertions(+) > > diff --git a/drivers/net/ethernet/qlogic/qede/qede_main.c b/drivers/net/ethernet/qlogic/qede/qede_main.c > index d57e52a97f85..35ef187e4825 100644 > --- a/drivers/net/ethernet/qlogic/qede/qede_main.c > +++ b/drivers/net/ethernet/qlogic/qede/qede_main.c > @@ -177,6 +177,18 @@ static int qede_sriov_configure(struct pci_dev *pdev, int num_vfs_param) > } > #endif > > +static int __maybe_unused qede_suspend(struct device *dev) > +{ > + if (!dev) > + return -ENODEV; > + > + dev_info(dev, "Device does not support suspend operation\n"); > + > + return -EOPNOTSUPP; > +} > + > +static SIMPLE_DEV_PM_OPS(qede_pm_ops, qede_suspend, NULL); The comment above the definition of SIMPLE_DEV_PM_OPS says that it is deprecated and that DEFINE_SIMPLE_DEV_PM_OPS should be used instead. > + > static const struct pci_error_handlers qede_err_handler = { > .error_detected = qede_io_error_detected, > }; > @@ -191,6 +203,7 @@ 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 = {
diff --git a/drivers/net/ethernet/qlogic/qede/qede_main.c b/drivers/net/ethernet/qlogic/qede/qede_main.c index d57e52a97f85..35ef187e4825 100644 --- a/drivers/net/ethernet/qlogic/qede/qede_main.c +++ b/drivers/net/ethernet/qlogic/qede/qede_main.c @@ -177,6 +177,18 @@ static int qede_sriov_configure(struct pci_dev *pdev, int num_vfs_param) } #endif +static int __maybe_unused qede_suspend(struct device *dev) +{ + if (!dev) + return -ENODEV; + + dev_info(dev, "Device does not support suspend operation\n"); + + return -EOPNOTSUPP; +} + +static 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, }; @@ -191,6 +203,7 @@ 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 = {
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. Fixes: 2950219d87b0 ("qede: Add basic network device support") Cc: David Miller <davem@davemloft.net> Signed-off-by: Manish Chopra <manishc@marvell.com> Signed-off-by: Alok Prasad <palok@marvell.com> --- drivers/net/ethernet/qlogic/qede/qede_main.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)