diff options
author | Christian Ehrhardt <christian.ehrhardt@canonical.com> | 2017-05-16 14:51:32 +0200 |
---|---|---|
committer | Christian Ehrhardt <christian.ehrhardt@canonical.com> | 2017-05-16 14:51:32 +0200 |
commit | fca143f059a0bddd7d47b8dc2df646a891b0eb0f (patch) | |
tree | 4bfeadc905c977e45e54a90c42330553b8942e4e /drivers/net/e1000/base/e1000_mbx.c | |
parent | ce3d555e43e3795b5d9507fcfc76b7a0a92fd0d6 (diff) |
Imported Upstream version 17.05
Diffstat (limited to 'drivers/net/e1000/base/e1000_mbx.c')
-rw-r--r-- | drivers/net/e1000/base/e1000_mbx.c | 36 |
1 files changed, 25 insertions, 11 deletions
diff --git a/drivers/net/e1000/base/e1000_mbx.c b/drivers/net/e1000/base/e1000_mbx.c index 6daf16b0..a92fd22e 100644 --- a/drivers/net/e1000/base/e1000_mbx.c +++ b/drivers/net/e1000/base/e1000_mbx.c @@ -430,15 +430,21 @@ STATIC s32 e1000_check_for_rst_vf(struct e1000_hw *hw, STATIC s32 e1000_obtain_mbx_lock_vf(struct e1000_hw *hw) { s32 ret_val = -E1000_ERR_MBX; + int count = 10; DEBUGFUNC("e1000_obtain_mbx_lock_vf"); - /* Take ownership of the buffer */ - E1000_WRITE_REG(hw, E1000_V2PMAILBOX(0), E1000_V2PMAILBOX_VFU); + do { + /* Take ownership of the buffer */ + E1000_WRITE_REG(hw, E1000_V2PMAILBOX(0), E1000_V2PMAILBOX_VFU); - /* reserve mailbox for vf use */ - if (e1000_read_v2p_mailbox(hw) & E1000_V2PMAILBOX_VFU) - ret_val = E1000_SUCCESS; + /* reserve mailbox for vf use */ + if (e1000_read_v2p_mailbox(hw) & E1000_V2PMAILBOX_VFU) { + ret_val = E1000_SUCCESS; + break; + } + usec_delay(1000); + } while (count-- > 0); return ret_val; } @@ -645,18 +651,26 @@ STATIC s32 e1000_obtain_mbx_lock_pf(struct e1000_hw *hw, u16 vf_number) { s32 ret_val = -E1000_ERR_MBX; u32 p2v_mailbox; + int count = 10; DEBUGFUNC("e1000_obtain_mbx_lock_pf"); - /* Take ownership of the buffer */ - E1000_WRITE_REG(hw, E1000_P2VMAILBOX(vf_number), E1000_P2VMAILBOX_PFU); + do { + /* Take ownership of the buffer */ + E1000_WRITE_REG(hw, E1000_P2VMAILBOX(vf_number), + E1000_P2VMAILBOX_PFU); - /* reserve mailbox for vf use */ - p2v_mailbox = E1000_READ_REG(hw, E1000_P2VMAILBOX(vf_number)); - if (p2v_mailbox & E1000_P2VMAILBOX_PFU) - ret_val = E1000_SUCCESS; + /* reserve mailbox for pf use */ + p2v_mailbox = E1000_READ_REG(hw, E1000_P2VMAILBOX(vf_number)); + if (p2v_mailbox & E1000_P2VMAILBOX_PFU) { + ret_val = E1000_SUCCESS; + break; + } + usec_delay(1000); + } while (count-- > 0); return ret_val; + } /** |