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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 /tools/perf/scripts/python/syscall-counts.py | |
| parent | mmc: host: sdhci-sprd: Implement the request_atomic() API (diff) | |
| download | linux-49769d4d350ddf3a25eb722019964b5e16b3efdc.tar.gz 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 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions