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| author | delphij <delphij@FreeBSD.org> | 2011-11-09 21:53:49 +0000 |
|---|---|---|
| committer | delphij <delphij@FreeBSD.org> | 2011-11-09 21:53:49 +0000 |
| commit | 8e06d9e08e0ba646624564499631f71633de7e1c (patch) | |
| tree | 7c9530d477f19f15f647269d8139fc102af2052b /sys/dev/mfi | |
| parent | 5eb7ebdde2c240460e198d21c86c2ce565d08582 (diff) | |
| download | FreeBSD-src-8e06d9e08e0ba646624564499631f71633de7e1c.zip FreeBSD-src-8e06d9e08e0ba646624564499631f71633de7e1c.tar.gz | |
Do a dummy read to flush the interrupt ACK that we just performed,
ensuring that everything is really, truly consistent.
This fixes certain cases where one will see various:
mfi0: COMMAND 0xffffffXXXXXXXXXX TIMEOUT AFTER XX SECONDS
MFC after: 3 days
Submitted by: scottl
Ok'ed by: jhb
Diffstat (limited to 'sys/dev/mfi')
| -rw-r--r-- | sys/dev/mfi/mfi.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/sys/dev/mfi/mfi.c b/sys/dev/mfi/mfi.c index 2161338..aa52b36 100644 --- a/sys/dev/mfi/mfi.c +++ b/sys/dev/mfi/mfi.c @@ -932,6 +932,12 @@ mfi_intr(void *arg) if (sc->mfi_check_clear_intr(sc)) return; + /* + * Do a dummy read to flush the interrupt ACK that we just performed, + * ensuring that everything is really, truly consistent. + */ + (void)sc->mfi_read_fw_status(sc); + pi = sc->mfi_comms->hw_pi; ci = sc->mfi_comms->hw_ci; mtx_lock(&sc->mfi_io_lock); |
