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@samsung.com>
Signed-off-by: Chris Ball <chris@printf.net>
Signed-off-by: Fu Zhonghui <zhonghui.fu@linux.intel.com>
Cc: <stable@vger.kernel.org> # v3.16+
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

2 files changed, 12 insertions, 4 deletions

diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index e636d9e99e4a..3fc40a7140a8 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -992,8 +992,16 @@ 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_host_clk_hold(host);
+                        host->ops->enable_sdio_irq(host, 1);
+                        mmc_host_clk_release(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 5cc13c8d35bb..696eca493844 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);