Messages in this thread | | | From | Julian Vetter <> | Subject | [PATCH 0/2] Check for MSI allocation | Date | Thu, 9 Jun 2022 17:38:41 +0200 |
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Our HW has a mailbox periph that supports up to 8192 MSIs, so the currently supported 2048 is not enough. I believe there is no real reason to contstrain the max platform MSIs to 2048, because the value is stored in an irq_hw_number_t which is big enough to hold more MSIs. The value is OR'ed with the device ID of which there is also a limited number. The second patch contains a WARN() to warn the user if a device tries to obtain more that MAX_DEV_MSIS, because this could lead to potentially conflicting virtual interrupt numbers (as was the case for us) without the Linux kernel telling us.
Julian Vetter (2): msi: The MSI framework only supports 2048 platform MSIs msi: Add sanity check if more than MAX_DEV_MSIS MSIs are requested
drivers/base/platform-msi.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
-- 2.17.1
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