i40e: Fix erroneous adapter reinitialization during recovery process
authorDawid Lukwinski <dawid.lukwinski@intel.com>
Fri, 15 Jul 2022 21:45:41 +0000 (14:45 -0700)
committerJakub Kicinski <kuba@kernel.org>
Tue, 19 Jul 2022 03:13:22 +0000 (20:13 -0700)
commitf838a63369818faadec4ad1736cfbd20ab5da00e
treeaaa043dcb1a1ae422585173c20cacec4cddde9d1
parent3696c952da0733b843c8da3441345055b1cbacd9
i40e: Fix erroneous adapter reinitialization during recovery process

Fix an issue when driver incorrectly detects state
of recovery process and erroneously reinitializes interrupts,
which results in a kernel error and call trace message.

The issue was caused by a combination of two factors:
1. Assuming the EMP reset issued after completing
firmware recovery means the whole recovery process is complete.
2. Erroneous reinitialization of interrupt vector after detecting
the above mentioned EMP reset.

Fixes (1) by changing how recovery state change is detected
and (2) by adjusting the conditional expression to ensure using proper
interrupt reinitialization method, depending on the situation.

Fixes: 4ff0ee1af016 ("i40e: Introduce recovery mode support")
Signed-off-by: Dawid Lukwinski <dawid.lukwinski@intel.com>
Signed-off-by: Jan Sokolowski <jan.sokolowski@intel.com>
Tested-by: Konrad Jankowski <konrad0.jankowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Link: https://lore.kernel.org/r/20220715214542.2968762-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
drivers/net/ethernet/intel/i40e/i40e_main.c