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| author | Haibo Chen <haibo.chen@nxp.com> | 2020-04-15 17:00:55 +0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2020-05-28 11:20:59 +0200 |
| commit | 49769d4d350ddf3a25eb722019964b5e16b3efdc (patch) | |
| tree | ce4cb60fe2d18dfa88f722c1bf62ef5619b7e7f9 /drivers/mmc/host/sdhci.c | |
| parent | 61ab64e2f54f4c607428667f83f411cb659843a3 (diff) | |
| download | linux-49769d4d350ddf3a25eb722019964b5e16b3efdc.tar.gz linux-49769d4d350ddf3a25eb722019964b5e16b3efdc.tar.bz2 linux-49769d4d350ddf3a25eb722019964b5e16b3efdc.zip | |
mmc: sdhci: add spin lock for sdhci_set_default_irqs in sdhci_init
When use one SDIO wifi which enable the runtime PM feature on i.MX6SX,
we meet system hang. This hang happened during the usdhc runtime resume,
in sdhci_init(), when call the sdhci_set_default_irqs. One interrupt
(SDHCI_INT_CARD_INT) triggered just after the host->ier update and before
the write of register SDHCI_SIGNAL_ENABLE. So in sdhci_irq, it will skip
the call of sdio_signal_irq() because current host->ier do not set the
SDHCI_INT_CARD_INT. So this SDIO wifi interrupt always keep triggered,
let the system stuck in irq handle, can't response any other thread.
This patch add spin lock for the sdhci_set_default_irqs to fix this issue.
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/1586941255-9237-1-git-send-email-haibo.chen@nxp.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/sdhci.c')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 6cc72177f853..1bb6b6796318 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -317,6 +317,7 @@ out: static void sdhci_init(struct sdhci_host *host, int soft) { struct mmc_host *mmc = host->mmc; + unsigned long flags; if (soft) sdhci_do_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); @@ -326,7 +327,9 @@ static void sdhci_init(struct sdhci_host *host, int soft) if (host->v4_mode) sdhci_do_enable_v4_mode(host); + spin_lock_irqsave(&host->lock, flags); sdhci_set_default_irqs(host); + spin_unlock_irqrestore(&host->lock, flags); host->cqe_on = false; |