i40e: Acquire NVM lock before reads on all devices

[ Upstream commit 96a39aed25e6559b160786117df124084feb9080 ]

Acquire NVM lock before reads on all devices.  Previously, locks were
only used for X722 and later.  Fixes an issue where simultaneous X710
NVM accesses were interfering with each other.

Change-ID: If570bb7acf958cef58725ec2a2011cead6f80638
Signed-off-by: Aaron Salter <aaron.k.salter@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_nvm.c b/drivers/net/ethernet/intel/i40e/i40e_nvm.c
index 6100cdd9ad13b420f20a640f8dc2572b89afb92d..dd4e6ea9e0e1bd4707c4a3b29fd2a99eff955d5e 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_nvm.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_nvm.c
@@ -292,14 +292,14 @@ i40e_status i40e_read_nvm_word(struct i40e_hw *hw, u16 offset,
 {
        enum i40e_status_code ret_code = 0;
 
-       if (hw->flags & I40E_HW_FLAG_AQ_SRCTL_ACCESS_ENABLE) {
-               ret_code = i40e_acquire_nvm(hw, I40E_RESOURCE_READ);
-               if (!ret_code) {
+       ret_code = i40e_acquire_nvm(hw, I40E_RESOURCE_READ);
+       if (!ret_code) {
+               if (hw->flags & I40E_HW_FLAG_AQ_SRCTL_ACCESS_ENABLE) {
                        ret_code = i40e_read_nvm_word_aq(hw, offset, data);
-                       i40e_release_nvm(hw);
+               } else {
+                       ret_code = i40e_read_nvm_word_srctl(hw, offset, data);
                }
-       } else {
-               ret_code = i40e_read_nvm_word_srctl(hw, offset, data);
+               i40e_release_nvm(hw);
        }
        return ret_code;
 }