diff options
| author | Ezequiel Garcia <ezequiel@collabora.com> | 2019-05-26 01:25:22 +0300 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2019-07-13 18:11:26 +0300 |
| commit | d66fb5b1f6662a8aa5f78994696994c2594dbb22 (patch) | |
| tree | 8aca15fa6816e8b283ecf04caf4af04b0b8d5387 /drivers/mmc/mmc_legacy.c | |
| parent | bf7c01d92b8458524190f585b20748f470bc9418 (diff) | |
| download | u-boot-d66fb5b1f6662a8aa5f78994696994c2594dbb22.tar.xz | |
mmc: Register only the first MMC device on MMC_TINY
When MMC_TINY is enabled, support for only one MMC device
is provided. Boards that register more than one device,
will just write over mmc_static keeping only the last one
registered.
This commit prevents this, keeping only the first MMC
device created. A debug warning message is added, if nothing
else, as a hint/documentation for developers.
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Diffstat (limited to 'drivers/mmc/mmc_legacy.c')
| -rw-r--r-- | drivers/mmc/mmc_legacy.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/mmc/mmc_legacy.c b/drivers/mmc/mmc_legacy.c index 66a7cda440..b0f5cf58a2 100644 --- a/drivers/mmc/mmc_legacy.c +++ b/drivers/mmc/mmc_legacy.c @@ -150,6 +150,15 @@ struct mmc *mmc_create(const struct mmc_config *cfg, void *priv) { struct mmc *mmc = &mmc_static; + /* First MMC device registered, fail to register a new one. + * Given users are not expecting this to fail, instead + * of failing let's just return the only MMC device + */ + if (mmc->cfg) { + debug("Warning: MMC_TINY doesn't support multiple MMC devices\n"); + return mmc; + } + mmc->cfg = cfg; mmc->priv = priv; |