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| author |   Robin Getz <robin.getz@analog.com> | 2009-06-22 02:02:16 +0000 |
|---|---|---|
| committer |   Mike Frysinger <vapier@gentoo.org> | 2009-09-16 21:28:28 -0400 |
| commit | ae4f073c40bf677b03826262e6022b4a251fe437 (patch) | |
| tree | 452c91be30a3970efbea5780d368945e7f63712c /arch/blackfin/lib | |
| parent | Blackfin: bf537-stamp: add resources for AD1938 audio card (diff) | |
| download | linux-dev-ae4f073c40bf677b03826262e6022b4a251fe437.tar.xz linux-dev-ae4f073c40bf677b03826262e6022b4a251fe437.zip | |
Blackfin: make EVT3->EVT5 lowering more robust wrt IPEND[4]
We handle many exceptions at EVT5 (hardware error level) so that we can
catch exceptions in our exception handling code. Today - if the global
interrupt enable bit (IPEND[4]) is set (interrupts disabled) our trap
handling code goes into a infinite loop, since we need interrupts to be
on to defer things to EVT5.
Normal kernel code should not trigger this for any reason as IPEND[4] gets
cleared early (when doing an interrupt context save) and the kernel stack
there should be sane (or something much worse is happening in the system).
But there have been a few times where this has happened, so this change
makes sure we dump a proper crash message even when things have gone south.
Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch/blackfin/lib')
0 files changed, 0 insertions, 0 deletions