diff options
| author | Rick Farrington | 2017-05-16 20:14:50 +0200 |
|---|---|---|
| committer | David S. Miller | 2017-05-17 20:48:29 +0200 |
| commit | e1e3ce623699d0cd594fa69f69371a9dbc55aa9a (patch) | |
| tree | be097d666f31a22fb11267bebdbf28cf8ddd0d97 /drivers/net/ethernet/cavium/liquidio/lio_main.c | |
| parent | net: dsa: store CPU port pointer in the tree (diff) | |
| download | kernel-qcow2-linux-e1e3ce623699d0cd594fa69f69371a9dbc55aa9a.tar.gz kernel-qcow2-linux-e1e3ce623699d0cd594fa69f69371a9dbc55aa9a.tar.xz kernel-qcow2-linux-e1e3ce623699d0cd594fa69f69371a9dbc55aa9a.zip | |
liquidio: fix insmod failure when multiple NICs are plugged in
When multiple liquidio NICs are plugged in, the first insmod of the PF
driver succeeds. But after an rmmod, a subsequent insmod fails. Reason is
during rmmod, the PF driver resets the Octeon of only one of the NICs; it
neglects to reset the Octeons of the other NICs.
Fix the insmod failure by adding the missing Octeon resets at rmmod. Keep
a per-NIC refcount that indicates the number of active PFs in a given NIC.
When the refcount goes to zero, then reset the Octeon of that NIC.
Signed-off-by: Rick Farrington <ricardo.farrington@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/cavium/liquidio/lio_main.c')
| -rw-r--r-- | drivers/net/ethernet/cavium/liquidio/lio_main.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/drivers/net/ethernet/cavium/liquidio/lio_main.c b/drivers/net/ethernet/cavium/liquidio/lio_main.c index 927617cbf6a9..360ddc8b2afb 100644 --- a/drivers/net/ethernet/cavium/liquidio/lio_main.c +++ b/drivers/net/ethernet/cavium/liquidio/lio_main.c @@ -1421,7 +1421,7 @@ static bool fw_type_is_none(void) */ static void octeon_destroy_resources(struct octeon_device *oct) { - int i; + int i, refcount; struct msix_entry *msix_entries; struct octeon_device_priv *oct_priv = (struct octeon_device_priv *)oct->priv; @@ -1556,10 +1556,14 @@ static void octeon_destroy_resources(struct octeon_device *oct) /* fallthrough */ case OCT_DEV_PCI_MAP_DONE: + refcount = octeon_deregister_device(oct); + if (!fw_type_is_none()) { - /* Soft reset the octeon device before exiting */ - if (!OCTEON_CN23XX_PF(oct) || - (OCTEON_CN23XX_PF(oct) && !oct->octeon_id)) + /* Soft reset the octeon device before exiting. + * Implementation note: here, we reset the device + * if it is a CN6XXX OR the last CN23XX device. + */ + if (OCTEON_CN6XXX(oct) || !refcount) oct->fn_list.soft_reset(oct); } @@ -4511,6 +4515,15 @@ static int octeon_device_init(struct octeon_device *octeon_dev) atomic_set(&octeon_dev->status, OCT_DEV_PCI_MAP_DONE); + /* Only add a reference after setting status 'OCT_DEV_PCI_MAP_DONE', + * since that is what is required for the reference to be removed + * during de-initialization (see 'octeon_destroy_resources'). + */ + octeon_register_device(octeon_dev, octeon_dev->pci_dev->bus->number, + PCI_SLOT(octeon_dev->pci_dev->devfn), + PCI_FUNC(octeon_dev->pci_dev->devfn), + true); + octeon_dev->app_mode = CVM_DRV_INVALID_APP; if (OCTEON_CN23XX_PF(octeon_dev)) { |