doc: porting guide: minor grammar fixups

Fix some minor grammar issues for readability.

Signed-off-by: Kevin Hilman <khilman@baylibre.com>
This commit is contained in:
Kevin Hilman 2021-05-20 13:46:26 -07:00 committed by Anas Nashif
commit d7f47296c9

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@ -87,7 +87,7 @@ on its behalf, it raises an interrupt. When a thread does an operation that is
not handled by the serial flow of the software itself, it raises an exception.
Both, interrupts and exceptions, pass control to a handler. The handler is
known as an :abbr:`ISR (Interrupt Service Routine)` in the case of
interrupts. The handler perform the work required the exception or the
interrupts. The handler performs the work required by the exception or the
interrupt. For interrupts, that work is device-specific. For exceptions, it
depends on the exception, but most often the core kernel itself is responsible
for providing the handler.