From beb423ba5b96026af25d42672b817c6cebc7f619 Mon Sep 17 00:00:00 2001 From: Kinsey Moore Date: Fri, 16 Feb 2024 12:42:47 -0600 Subject: 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. --- freebsd/sys/dev/mmc/mmcsd.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'freebsd') diff --git a/freebsd/sys/dev/mmc/mmcsd.c b/freebsd/sys/dev/mmc/mmcsd.c index 11cf945f..ff517abc 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 -- cgit v1.2.3