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| author | Pali Rohár <pali@kernel.org> | 2022-01-10 02:49:57 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-05-12 12:23:50 +0200 |
| commit | d789b98917612053b869ea2df151fbc0a503aacb (patch) | |
| tree | 5cd0aafc16ec6d2cf5360d6cbfce87eb640b7e57 /net/rxrpc | |
| parent | 253bc43ca5b79d054361ad6e2e45e11c91463ef2 (diff) | |
PCI: aardvark: Fix reading MSI interrupt number
commit 805dfc18dd3d4dd97a987d4406593b5a225b1253 upstream.
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>
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/rxrpc')
0 files changed, 0 insertions, 0 deletions