| Message ID | 20190908101236.2802-2-ulf.hansson@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | mmc: core: PM fixes/improvements for SDIO IRQs | expand |
Hi, On Sun, Sep 8, 2019 at 3:12 AM Ulf Hansson <ulf.hansson@linaro.org> wrote: > > 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> > --- > > Changes in v2: > - Renamed function to sdio_irq_claimed(). > > --- > include/linux/mmc/host.h | 9 +++++++++ > 1 file changed, 9 insertions(+) Reviewed-by: Douglas Anderson <dianders@chromium.org>
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 4a351cb7f20f..a9d52a4d5041 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);