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authorUlf Hansson <ulf.hansson@linaro.org>2019-09-08 12:12:27 +0200
committerUlf Hansson <ulf.hansson@linaro.org>2019-09-11 16:10:18 +0200
commit7c526608d5afb62cbc967225e2ccaacfdd142e9d (patch)
tree66710ab67ab6467031caafdaa56e1689725431e6 /drivers/mmc
parentbd880b00697befb73eff7220ee20bdae4fdd487b (diff)
downloadblackbird-op-linux-7c526608d5afb62cbc967225e2ccaacfdd142e9d.tar.gz
blackbird-op-linux-7c526608d5afb62cbc967225e2ccaacfdd142e9d.zip
mmc: dw_mmc: Re-store SDIO IRQs mask at system resume
In cases when SDIO IRQs have been enabled, runtime suspend is prevented by the driver. However, this still means dw_mci_runtime_suspend|resume() gets called during system suspend/resume, via pm_runtime_force_suspend|resume(). This means during system suspend/resume, the register context of the dw_mmc device most likely loses its register context, even in cases when SDIO IRQs have been enabled. To re-enable the SDIO IRQs during system resume, the dw_mmc driver currently relies on the mmc core to re-enable the SDIO IRQs when it resumes the SDIO card, but this isn't the recommended solution. Instead, it's better to deal with this locally in the dw_mmc driver, so let's do that. Tested-by: Matthias Kaehlcke <mka@chromium.org> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/dw_mmc.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index eea52e2c5a0c..79c55c7b4afd 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -3460,6 +3460,10 @@ int dw_mci_runtime_resume(struct device *dev)
/* Force setup bus to guarantee available clock output */
dw_mci_setup_bus(host->slot, true);
+ /* Re-enable SDIO interrupts. */
+ if (sdio_irq_claimed(host->slot->mmc))
+ __dw_mci_enable_sdio_irq(host->slot, 1);
+
/* Now that slots are all setup, we can enable card detect */
dw_mci_enable_cd(host);
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