numam-dpdk/drivers/net/axgbe
Pallantla Poornima c8c2296b59 net/axgbe: fix double unlock
One issue caught by Coverity 340835
*unlock: axgbe_phy_set_mode unlocks pdata->phy_mutex
*double_unlock: axgbe_phy_sfp_detect unlocks pdata->phy_mutex
while it is unlocked.

In axgbe_phy_sfp_detect()/axgbe_phy_set_redrv_mode(),
axgbe_phy_get_comm_ownership() and axgbe_phy_put_comm_ownership()
are invoked subsequently.

Currently in axgbe_phy_get_comm_ownership(), during one of the case
'phy_data->comm_owned' is not protected and before returning 0, lock is
not called and unlock is called in axgbe_phy_put_comm_ownership()
directly which is incorrect.

Ideally, the variable 'phy_data->comm_owned' needs to be protected.
During success scenario, lock is called in
axgbe_phy_get_comm_ownership() followed by unlock in
axgbe_phy_put_comm_ownership().  In failure case, unlock is invoked in
axgbe_phy_get_comm_ownership() itself appropriately.

The fix is to protect 'phy_data->comm_owned' in the identified case
ensuring locks/unlocks properly exist.

Coverity issue: 340835
Fixes: a5c7273771 ("net/axgbe: add phy programming APIs")
Cc: stable@dpdk.org

Signed-off-by: Pallantla Poornima <pallantlax.poornima@intel.com>
Acked-by: Ravi Kumar <ravi1.kumar@amd.com>
2019-10-23 16:43:10 +02:00
..
axgbe_common.h
axgbe_dev.c
axgbe_ethdev.c ethdev: change allmulticast callbacks to return status 2019-10-07 15:00:55 +02:00
axgbe_ethdev.h
axgbe_i2c.c
axgbe_logs.h
axgbe_mdio.c
axgbe_phy_impl.c net/axgbe: fix double unlock 2019-10-23 16:43:10 +02:00
axgbe_phy.h
axgbe_rxtx_vec_sse.c
axgbe_rxtx.c
axgbe_rxtx.h
Makefile drivers/net: use ack in interrupt handlers 2019-07-23 12:00:23 +02:00
meson.build drivers/net: use ack in interrupt handlers 2019-07-23 12:00:23 +02:00
rte_pmd_axgbe_version.map