diff options
| author |   Arnd Bergmann <arnd@arndb.de> | 2016-06-01 15:29:13 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-06-01 22:04:54 -0700 |
| commit | 14b84e8654c89ed59f433654e6bb64c886d095cd (patch) | |
| tree | 133468288259491c2cc894f757f51d5a3a763b8b /drivers/net/ethernet/qlogic/qede/qede_main.c | |
| parent | net/ethoc: fix null dereference on error exit path (diff) | |
| download | linux-dev-14b84e8654c89ed59f433654e6bb64c886d095cd.tar.xz linux-dev-14b84e8654c89ed59f433654e6bb64c886d095cd.zip | |
qed: fix qed_fill_link() error handling
gcc warns about qed_fill_link possibly accessing uninitialized data:
drivers/net/ethernet/qlogic/qed/qed_main.c: In function 'qed_fill_link':
drivers/net/ethernet/qlogic/qed/qed_main.c:1170:35: error: 'link_caps' may be used uninitialized in this function [-Werror=maybe-uninitialized]
While this warning is only about the specific case of CONFIG_QED_SRIOV
being disabled but the function getting called for a VF (which should
never happen), another possibility is that qed_mcp_get_*() fails without
returning data.
This rearranges the code so we bail out in either of the two cases
and print a warning instead of accessing the uninitialized data.
The qed_link_output structure remains untouched in this case, but
all callers first call memset() on it, so at least we are not leaking
stack data then.
As discussed, we also use a compile-time check to ensure we never
use any of the VF code if CONFIG_QED_SRIOV is disabled, and the
PCI device table is updated to no longer bind to virtual functions
in that configuration.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | drivers/net/ethernet/qlogic/qede/qede_main.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/ethernet/qlogic/qede/qede_main.c b/drivers/net/ethernet/qlogic/qede/qede_main.c index 5d00d1404bfc..5733d1888223 100644 --- a/drivers/net/ethernet/qlogic/qede/qede_main.c +++ b/drivers/net/ethernet/qlogic/qede/qede_main.c @@ -87,7 +87,9 @@ static const struct pci_device_id qede_pci_tbl[] = { {PCI_VDEVICE(QLOGIC, PCI_DEVICE_ID_57980S_100), QEDE_PRIVATE_PF}, {PCI_VDEVICE(QLOGIC, PCI_DEVICE_ID_57980S_50), QEDE_PRIVATE_PF}, {PCI_VDEVICE(QLOGIC, PCI_DEVICE_ID_57980S_25), QEDE_PRIVATE_PF}, +#ifdef CONFIG_QED_SRIOV {PCI_VDEVICE(QLOGIC, PCI_DEVICE_ID_57980S_IOV), QEDE_PRIVATE_VF}, +#endif { 0 } }; |