diff options
| author | Ian Moffett <ian@osmora.org> | 2024-05-31 11:21:13 -0400 |
|---|---|---|
| committer | Ian Moffett <ian@osmora.org> | 2024-05-31 11:21:13 -0400 |
| commit | 280f43aa8400cbb1ed61ca29e17f487310a4a5cc (patch) | |
| tree | bac06917dbd56b663e01e2c3fdc1ceead8c07448 /sys/dev | |
| parent | 65e5d1448eb10fea727d16d0c43a6929f61455c1 (diff) | |
kernel: ahci: Document workaround
Documents a workaround for a possible hw/emulation quirk
Signed-off-by: Ian Moffett <ian@osmora.org>
Diffstat (limited to 'sys/dev')
| -rw-r--r-- | sys/dev/ic/ahci.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/sys/dev/ic/ahci.c b/sys/dev/ic/ahci.c index 43b4d1d..14dbf74 100644 --- a/sys/dev/ic/ahci.c +++ b/sys/dev/ic/ahci.c @@ -444,6 +444,12 @@ ahci_reset_port(struct hba_port *port) { uint32_t sctl, ssts; + /* + * Some odd behaviour may occur if a COMRESET is sent + * to the port while it is in an idle state... + * A workaround to this is to bring the port up + * then immediately transmit the COMRESET to the device. + */ ahci_start_port(port); sctl = mmio_read32(&port->sctl); |