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The Intel Lynxpoint pinctrl driver implements irqchip callbacks which are called with desc->lock raw_spinlock held. In mainline this is fine because spinlock resolves to raw_spinlock. However, running the same code in -rt we will get a BUG() asserted. This is because in -rt spinlocks are preemptible so taking the driver private spinlock in irqchip callbacks causes might_sleep() to trigger. In order to keep -rt happy but at the same time make sure that register accesses get serialized, convert the driver to use raw_spinlock instead. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> |
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| .. | ||
| Kconfig | ||
| Makefile | ||
| pinctrl-baytrail.c | ||
| pinctrl-broxton.c | ||
| pinctrl-cannonlake.c | ||
| pinctrl-cedarfork.c | ||
| pinctrl-cherryview.c | ||
| pinctrl-denverton.c | ||
| pinctrl-geminilake.c | ||
| pinctrl-icelake.c | ||
| pinctrl-intel.c | ||
| pinctrl-intel.h | ||
| pinctrl-lewisburg.c | ||
| pinctrl-lynxpoint.c | ||
| pinctrl-merrifield.c | ||
| pinctrl-sunrisepoint.c | ||
| pinctrl-tigerlake.c | ||