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authorUlf Hansson <ulf.hansson@linaro.org>2019-09-08 13:12:26 +0300
committerUlf Hansson <ulf.hansson@linaro.org>2019-09-11 17:10:18 +0300
commitbd880b00697befb73eff7220ee20bdae4fdd487b (patch)
tree35cb7dea2412c70be23b86af22415fcd5ff5fe32
parent20964a11fa8b70019af83785fd4d639f7b90ae4d (diff)
downloadlinux-bd880b00697befb73eff7220ee20bdae4fdd487b.tar.xz
mmc: core: Add helper function to indicate if SDIO IRQs is enabled
To avoid each host driver supporting SDIO IRQs, from keeping track internally about if SDIO IRQs has been claimed, let's introduce a common helper function, sdio_irq_claimed(). The function returns true if SDIO IRQs are claimed, via using the information about the number of claimed irqs. This is safe, even without any locks, as long as the helper function is called only from runtime/system suspend callbacks of the host driver. 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>
-rw-r--r--include/linux/mmc/host.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 4a351cb7f20f..cf87c673cbb8 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -493,6 +493,15 @@ void mmc_command_done(struct mmc_host *host, struct mmc_request *mrq);
void mmc_cqe_request_done(struct mmc_host *host, struct mmc_request *mrq);
+/*
+ * May be called from host driver's system/runtime suspend/resume callbacks,
+ * to know if SDIO IRQs has been claimed.
+ */
+static inline bool sdio_irq_claimed(struct mmc_host *host)
+{
+ return host->sdio_irqs > 0;
+}
+
static inline void mmc_signal_sdio_irq(struct mmc_host *host)
{
host->ops->enable_sdio_irq(host, 0);