On 11 August 2014 07:49, Fu, Zhonghui <zhonghui.fu@xxxxxxxxxxxxxxx> wrote:
> From 6cee984e1d76ba0a3320430f8cf4318ab65fcf06 Mon Sep 17 00:00:00 2001
> From: Fu Zhonghui <zhonghui.fu@xxxxxxxxxxxxxxx>
> Date: Tue, 5 Aug 2014 12:44:38 +0800
> Subject: [PATCH] mmc: core: sdio: Fix unconditional wake_up_process() on sdio thread
>
> 781e989cf59 ("mmc: sdhci: convert to new SDIO IRQ handling") and
> bf3b5ec66bd ("mmc: sdio_irq: rework sdio irq handling") disabled
> the use of our own custom threaded IRQ handler, but left in an
> unconditional wake_up_process() on that handler at resume-time.
> Link: https://bugzilla.kernel.org/show_bug.cgi?id=80151
>
> In addition, the check for MMC_CAP_SDIO_IRQ capability is added
> before enable sdio IRQ.
>
> Signed-off-by: Jaehoon Chung <jh80.chung@xxxxxxxxxxx>
> Signed-off-by: Chris Ball <chris@xxxxxxxxxx>
> Signed-off-by: Fu Zhonghui <zhonghui.fu@xxxxxxxxxxxxxxx>
> ---
> drivers/mmc/core/sdio.c | 14 ++++++++++++--
> drivers/mmc/core/sdio_irq.c | 4 ++--
> 2 files changed, 14 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
> index e636d9e..e04a540 100644
> --- a/drivers/mmc/core/sdio.c
> +++ b/drivers/mmc/core/sdio.c
> @@ -992,8 +992,18 @@ static int mmc_sdio_resume(struct mmc_host *host)
> }
> }
>
> - if (!err && host->sdio_irqs)
> - wake_up_process(host->sdio_irq_thread);
> + if (!err && host->sdio_irqs) {
> + if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD)) {
> + wake_up_process(host->sdio_irq_thread);
> + } else if (host->caps & MMC_CAP_SDIO_IRQ) {
> + mmc_release_host(host);
Why mmc_release_host() and the corresponding mmc_claim_host() below?
Those shouldn't be needed I think.
> + mmc_host_clk_hold(host);
> + host->ops->enable_sdio_irq(host, 1);
> + mmc_host_clk_release(host);
> + mmc_claim_host(host);
> + }
> + }
> +
> mmc_release_host(host);
>
> host->pm_flags &= ~MMC_PM_KEEP_POWER;
> diff --git a/drivers/mmc/core/sdio_irq.c b/drivers/mmc/core/sdio_irq.c
> index 5cc13c8..696eca4 100644
> --- a/drivers/mmc/core/sdio_irq.c
> +++ b/drivers/mmc/core/sdio_irq.c
> @@ -208,7 +208,7 @@ static int sdio_card_irq_get(struct mmc_card *card)
> host->sdio_irqs--;
> return err;
> }
> - } else {
> + } else if (host->caps & MMC_CAP_SDIO_IRQ) {
> mmc_host_clk_hold(host);
> host->ops->enable_sdio_irq(host, 1);
> mmc_host_clk_release(host);
> @@ -229,7 +229,7 @@ static int sdio_card_irq_put(struct mmc_card *card)
> if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD)) {
> atomic_set(&host->sdio_irq_thread_abort, 1);
> kthread_stop(host->sdio_irq_thread);
> - } else {
> + } else if (host->caps & MMC_CAP_SDIO_IRQ) {
> mmc_host_clk_hold(host);
> host->ops->enable_sdio_irq(host, 0);
> mmc_host_clk_release(host);
> -- 1.7.1
>
Thanks for working on this!
Kind regards
Uffe
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