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| author | Pali Rohár <pali@kernel.org> | 2022-01-10 04:49:57 +0300 |
|---|---|---|
| committer | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2022-02-08 13:40:52 +0300 |
| commit | 805dfc18dd3d4dd97a987d4406593b5a225b1253 (patch) | |
| tree | 9efba5af53727b27f2930785bdaa4067cfdb4588 /tools/perf/scripts/python/stackcollapse.py | |
| parent | 1d86abf1f89672a70f2ab65f6000299feb1f1781 (diff) | |
| download | linux-805dfc18dd3d4dd97a987d4406593b5a225b1253.tar.xz | |
PCI: aardvark: Fix reading MSI interrupt number
In advk_pcie_handle_msi() it is expected that when bit i in the W1C
register PCIE_MSI_STATUS_REG is cleared, the PCIE_MSI_PAYLOAD_REG is
updated to contain the MSI number corresponding to index i.
Experiments show that this is not so, and instead PCIE_MSI_PAYLOAD_REG
always contains the number of the last received MSI, overall.
Do not read PCIE_MSI_PAYLOAD_REG register for determining MSI interrupt
number. Since Aardvark already forbids more than 32 interrupts and uses
own allocated hwirq numbers, the msi_idx already corresponds to the
received MSI number.
Link: https://lore.kernel.org/r/20220110015018.26359-3-kabel@kernel.org
Fixes: 8c39d710363c ("PCI: aardvark: Add Aardvark PCI host controller driver")
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions