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| author | Gwendal Grignou <gwendal@chromium.org> | 2016-04-01 16:04:22 -0700 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2016-05-02 10:33:24 +0200 |
| commit | 4e6c71788d6bb0e5438fc9211fa6e52dcca01474 (patch) | |
| tree | ae5fce16a3076b11bd1803d67f1c61f48192dd1d /drivers/mmc/core/core.c | |
| parent | 6aef2eecc4d4c9edb8c8d3e3a7f6af3cee42b2ec (diff) | |
| download | linux-4e6c71788d6bb0e5438fc9211fa6e52dcca01474.tar.bz2 | |
mmc: core: Do regular power cycle when lacking eMMC HW reset support
The eMMC HW reset may be implemented either via the host ops ->hw_reset()
callback or through DT and the eMMC pwrseq. Additionally some eMMC cards
don't support HW reset.
To allow a reset to be done for the different combinations of mmc hosts
and eMMC/MMC cards, let's implement a fallback via trying a regular power
cycle. This improves the mmc block layer retry mechanism of failing I/O
requests.
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
[Ulf: Rewrote changelog]
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/core/core.c')
| -rw-r--r-- | drivers/mmc/core/core.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index f80b3ab3266a..99275e40bf2f 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -2456,8 +2456,9 @@ int mmc_hw_reset(struct mmc_host *host) ret = host->bus_ops->reset(host); mmc_bus_put(host); - if (ret != -EOPNOTSUPP) - pr_warn("%s: tried to reset card\n", mmc_hostname(host)); + if (ret) + pr_warn("%s: tried to reset card, got error %d\n", + mmc_hostname(host), ret); return ret; } |