diff options
| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2018-01-17 19:28:13 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2018-03-05 15:03:48 +0300 |
| commit | c7cd630a9751b9ec8bba37edbba06a29e7d9a14b (patch) | |
| tree | e2477df48b6f37621895b045cc11d3d165d93556 /drivers/mmc | |
| parent | 497d1f965c207f1d670066e9c87a2ffad1ce4e5e (diff) | |
| download | linux-c7cd630a9751b9ec8bba37edbba06a29e7d9a14b.tar.xz | |
mmc: tmio: fix never-detected card insertion bug
The TMIO mmc cannot detect the card insertion in native_hotplug mode
if the driver is probed without a card inserted.
The reason is obvious; all IRQs are disabled by tmio_mmc_host_probe(),
as follows:
tmio_mmc_disable_mmc_irqs(_host, TMIO_MASK_ALL);
The card event IRQs are first enabled by tmio_mmc_start_command() as
follows:
if (!host->native_hotplug)
irq_mask &= ~(TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT);
tmio_mmc_enable_mmc_irqs(host, irq_mask);
If the driver is probed without a card, tmio_mmc_start_command() is
never called in the first place. So, the card is never detected.
The card event IRQs must be enabled in probe/resume functions.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/tmio_mmc_core.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c index 2abc425d45fd..add095368482 100644 --- a/drivers/mmc/host/tmio_mmc_core.c +++ b/drivers/mmc/host/tmio_mmc_core.c @@ -350,8 +350,6 @@ static int tmio_mmc_start_command(struct tmio_mmc_host *host, c |= TRANSFER_READ; } - if (!host->native_hotplug) - irq_mask &= ~(TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT); tmio_mmc_enable_mmc_irqs(host, irq_mask); /* Fire off the command */ @@ -1280,11 +1278,13 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host) irq_mask |= TMIO_MASK_READOP; if (!_host->chan_tx) irq_mask |= TMIO_MASK_WRITEOP; - if (!_host->native_hotplug) - irq_mask &= ~(TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT); _host->sdcard_irq_mask &= ~irq_mask; + if (_host->native_hotplug) + tmio_mmc_enable_mmc_irqs(_host, + TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT); + spin_lock_init(&_host->lock); mutex_init(&_host->ios_lock); @@ -1382,6 +1382,10 @@ int tmio_mmc_host_runtime_resume(struct device *dev) if (host->clk_cache) tmio_mmc_set_clock(host, host->clk_cache); + if (host->native_hotplug) + tmio_mmc_enable_mmc_irqs(host, + TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT); + tmio_mmc_enable_dma(host, true); if (tmio_mmc_can_retune(host) && host->select_tuning(host)) |