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| author | Rick Wertenbroek <rick.wertenbroek@gmail.com> | 2023-04-18 09:46:57 +0200 |
|---|---|---|
| committer | Lorenzo Pieralisi <lpieralisi@kernel.org> | 2023-06-22 09:36:51 +0200 |
| commit | a52587e0bee14cbeeadf48a24013828cb04b8df8 (patch) | |
| tree | 4b8b992a23ee79b7824455d54f79360fa60ce231 /include/linux/overflow.h | |
| parent | 8962b2cb39119cbda4fc69a1f83957824f102f81 (diff) | |
PCI: rockchip: Don't advertise MSI-X in PCIe capabilities
The RK3399 PCIe endpoint controller cannot generate MSI-X IRQs.
This is documented in the RK3399 technical reference manual (TRM)
section 17.5.9 "Interrupt Support".
MSI-X capability should therefore not be advertised. Remove the
MSI-X capability by editing the capability linked-list. The
previous entry is the MSI capability, therefore get the next
entry from the MSI-X capability entry and set it as next entry
for the MSI capability. This in effect removes MSI-X from the list.
Linked list before : MSI cap -> MSI-X cap -> PCIe Device cap -> ...
Linked list now : MSI cap -> PCIe Device cap -> ...
Link: https://lore.kernel.org/r/20230418074700.1083505-11-rick.wertenbroek@gmail.com
Fixes: cf590b078391 ("PCI: rockchip: Add EP driver for Rockchip PCIe controller")
Tested-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Rick Wertenbroek <rick.wertenbroek@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Cc: stable@vger.kernel.org
Diffstat (limited to 'include/linux/overflow.h')
0 files changed, 0 insertions, 0 deletions