diff options
| author | Avri Altman <avri.altman@wdc.com> | 2021-04-25 09:02:06 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2021-04-26 11:37:23 +0200 |
| commit | 97fce126e279690105ee15be652b465fd96f9997 (patch) | |
| tree | 2dd3ab5aa9deb206c7a5fbaec6e95414b01c7285 /drivers/mmc/core/core.h | |
| parent | 2f156712be4ab4c2707e096d619dc8bfbd01d388 (diff) | |
| download | linux-97fce126e279690105ee15be652b465fd96f9997.tar.bz2 | |
mmc: block: Issue a cache flush only when it's enabled
In command queueing mode, the cache isn't flushed via the mmc_flush_cache()
function, but instead by issuing a CMDQ_TASK_MGMT (CMD48) with a
FLUSH_CACHE opcode. In this path, we need to check if cache has been
enabled, before deciding to flush the cache, along the lines of what's
being done in mmc_flush_cache().
To fix this problem, let's add a new bus ops callback ->cache_enabled() and
implement it for the mmc bus type. In this way, the mmc block device driver
can call it to know whether cache flushing should be done.
Fixes: 1e8e55b67030 (mmc: block: Add CQE support)
Cc: stable@vger.kernel.org
Reported-by: Brendan Peter <bpeter@lytx.com>
Signed-off-by: Avri Altman <avri.altman@wdc.com>
Tested-by: Brendan Peter <bpeter@lytx.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20210425060207.2591-2-avri.altman@wdc.com
Link: https://lore.kernel.org/r/20210425060207.2591-3-avri.altman@wdc.com
[Ulf: Squashed the two patches and made some minor updates]
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/core/core.h')
| -rw-r--r-- | drivers/mmc/core/core.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h index 8032451abaea..db3c9c68875d 100644 --- a/drivers/mmc/core/core.h +++ b/drivers/mmc/core/core.h @@ -29,6 +29,7 @@ struct mmc_bus_ops { int (*shutdown)(struct mmc_host *); int (*hw_reset)(struct mmc_host *); int (*sw_reset)(struct mmc_host *); + bool (*cache_enabled)(struct mmc_host *); }; void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops); @@ -163,4 +164,12 @@ static inline void mmc_post_req(struct mmc_host *host, struct mmc_request *mrq, host->ops->post_req(host, mrq, err); } +static inline bool mmc_cache_enabled(struct mmc_host *host) +{ + if (host->bus_ops->cache_enabled) + return host->bus_ops->cache_enabled(host); + + return false; +} + #endif |