diff options
| author | Kinsey Moore <kinsey.moore@oarcorp.com> | 2024-02-16 12:42:47 -0600 |
|---|---|---|
| committer | Joel Sherrill <joel@rtems.org> | 2024-03-05 08:51:03 -0600 |
| commit | f980e47f88e694cc50a99f91bed057a9b5c3d48c (patch) | |
| tree | a1ca48cfd0fb2a8b25b68debfaa3c0e050e1f4ac | |
| parent | rtemsbsd: Remove unused variable (diff) | |
| download | rtems-libbsd-f980e47f88e694cc50a99f91bed057a9b5c3d48c.tar.bz2 | |
freebsd/mmcsd: Disable on-device cache usage
This disables any usage of the on-device R/W cache since all device
cache maintenance functions are compiled out under RTEMS leaving no way
to flush the cache before system reset and making data loss possible.
| -rw-r--r-- | freebsd/sys/dev/mmc/mmcsd.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/freebsd/sys/dev/mmc/mmcsd.c b/freebsd/sys/dev/mmc/mmcsd.c index bd45b419..1369f7f1 100644 --- a/freebsd/sys/dev/mmc/mmcsd.c +++ b/freebsd/sys/dev/mmc/mmcsd.c @@ -546,6 +546,11 @@ mmcsd_attach(device_t dev) */ rev = ext_csd[EXT_CSD_REV]; +/* + * Cache flush functions are currently not available. Use of on-device cache can + * cause data loss. + */ +#ifndef __rtems__ /* * With revision 1.5 (MMC v4.5, EXT_CSD_REV == 6) and later, take * advantage of the device R/W cache if present and useage is not @@ -567,6 +572,7 @@ mmcsd_attach(device_t dev) sc->flags |= MMCSD_FLUSH_CACHE; } } +#endif /* * Ignore user-creatable enhanced user data area and general purpose |