Messages in this thread | | | From | Phil Elwell <> | Subject | [PATCH 0/2] sc16is7xx interrupt fixes | Date | Wed, 12 Sep 2018 15:31:54 +0100 |
| |
The interrupt handling of the sc16is7xx driver is broken in a number of ways, as observed by multiple Raspberry Pi users. The attached patches attempt to address its failings, with apparent success.
The first is a workaround for a side-effect of the switch away from using a thread IRQ, a change which has necessitated using what is actually a level-triggered interrupt as if it were edge-triggered. Doing so is fraught with potential race conditions, but the patch makes them much less likely.
The second is a workaround for a bug in the design of the SC16IS752 which requires mutual exclusion between the interrupt handler and access to the Enhanced Features Register.
Phil Elwell (2): sc16is7xx: Fix for multi-channel stall sc16is7xx: Fix for "Unexpected interrupt: 8"
drivers/tty/serial/sc16is7xx.c | 50 +++++++++++++++++++++++++++++++++++++----- 1 file changed, 44 insertions(+), 6 deletions(-)
-- 2.7.4
| |