Currently sdhci driver free irq in host suspend, and call
request_threaded_irq() in host resume. But during host resume,
Ctrl+C can impact sdhci host resume, see the error log:
CPU1 is up
PM: noirq resume of devices complete after 0.637 msecs imx-sdma 30bd0000.sdma: loaded firmware 4.1
PM: early resume of devices complete after 0.774 msecs
dpm_run_callback(): platform_pm_resume+0x0/0x44 returns -4
PM: Device 30b40000.usdhc failed to resume: error -4
dpm_run_callback(): platform_pm_resume+0x0/0x44 returns -4
PM: Device 30b50000.usdhc failed to resume: error -4
dpm_run_callback(): platform_pm_resume+0x0/0x44 returns -4
PM: Device 30b60000.usdhc failed to resume: error -4 fec 30be0000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
mmc0: Timeout waiting for hardware interrupt.
mmc0: Timeout waiting for hardware interrupt.
mmc0: Timeout waiting for hardware interrupt.
mmc0: Timeout waiting for hardware interrupt.
mmc0: Timeout waiting for hardware interrupt.
mmc0: Timeout waiting for hardware interrupt.
mmc0: error -110 during resume (card was removed?)
mmc2: Timeout waiting for hardware interrupt.
mmc2: Timeout waiting for hardware interrupt.
mmc2: error -110 during resume (card was removed?)
In request_threaded_irq-> __setup_irq-> kthread_create
->kthread_create_on_node, the comment shows that SIGKILLed will
impact the kthread create, and return -EINTR.
This patch replace them with disable|enable_irq(), that will prevent
IRQs from being propagated to the sdhci driver.
Fixes: 781e989cf593 ("mmc: sdhci: convert to new SDIO IRQ handling")
Signed-off-by: Haibo Chen <haibo.chen@xxxxxxx>
---
drivers/mmc/host/sdhci.c | 12 +++---------
1 file changed, 3 insertions(+), 9 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index d622435..4b1646b 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2686,7 +2686,7 @@ int sdhci_suspend_host(struct sdhci_host *host)
host->ier = 0;
sdhci_writel(host, 0, SDHCI_INT_ENABLE);
sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE);
- free_irq(host->irq, host);
+ disable_irq(host->irq);
} else {
sdhci_enable_irq_wakeups(host);
enable_irq_wake(host->irq);
@@ -2698,8 +2698,6 @@ EXPORT_SYMBOL_GPL(sdhci_suspend_host);
int sdhci_resume_host(struct sdhci_host *host)
{
- int ret = 0;
-
if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA)) {
if (host->ops->enable_dma)
host->ops->enable_dma(host);
@@ -2718,11 +2716,7 @@ int sdhci_resume_host(struct sdhci_host *host)
}
if (!device_may_wakeup(mmc_dev(host->mmc))) {
- ret = request_threaded_irq(host->irq, sdhci_irq,
- sdhci_thread_irq, IRQF_SHARED,
- mmc_hostname(host->mmc), host);
- if (ret)
- return ret;
+ enable_irq(host->irq);
} else {
sdhci_disable_irq_wakeups(host);
disable_irq_wake(host->irq);
@@ -2730,7 +2724,7 @@ int sdhci_resume_host(struct sdhci_host *host)
sdhci_enable_card_detection(host);
- return ret;
+ return 0;
}
EXPORT_SYMBOL_GPL(sdhci_resume_host);
--
1.9.1
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