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)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 29 Jul 2022 15:25:20 +0000 (17:25 +0200)
commit893ea2b35bb9338444f76fa2eb8deae7a0415afa
tree115679429e1951195a4ec334f6f52fb67226becc
parentfad55088ad7384d9d26271e0fcb2ee36bb5dabe5
i40e: Fix erroneous adapter reinitialization during recovery process

[ Upstream commit f838a63369818faadec4ad1736cfbd20ab5da00e ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/net/ethernet/intel/i40e/i40e_main.c