bus: mhi: core: Allow shared IRQ for event rings

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There is no requirement for using a dedicated IRQ per event ring.
Some systems does not support multiple MSI vectors (e.g. intel
without CONFIG_IRQ_REMAP), In that case the MHI controller can
configure all the event rings to use the same interrupt (as fallback).

Allow this by removing the nr_irqs = ev_ring test and add extra check
in the irq_setup function.

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20200929175218.8178-17-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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This commit is contained in:

Loic Poulain 2020-09-29 23:22:15 +05:30 • committed by Greg Kroah-Hartman

parent 21cb9b18ed

commit b0fc0167f2

2 changed files with 8 additions and 1 deletions

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7

drivers/bus/mhi/core/init.c

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2

drivers/bus/mhi/core/pm.c

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