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[PATCH] ppc32: Fix might_sleep() warning with clock spreading

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The clock spreading disable/enable code was called to late/early during
the suspend/resume code on some laptops and would trigger a
might_sleep() warning due to the down() call in the low level i2c code.

This fixes it by calling those functions earlier/later when interrupts
are still enabled.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Benjamin Herrenschmidt 2005-05-02 16:12:00 +10:00 committed by Linus Torvalds
parent 6995f17a5a
commit e521dca64e
3 changed files with 14 additions and 10 deletions
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12
arch/ppc/platforms/pmac_feature.c
View file

@ -1591,8 +1591,10 @@ intrepid_shutdown(struct macio_chip* macio, int sleep_mode)
}
static void __pmac pmac_tweak_clock_spreading(struct macio_chip* macio, int enable)
void __pmac pmac_tweak_clock_spreading(int enable)
{
struct macio_chip* macio = &macio_chips[0];
/* Hack for doing clock spreading on some machines PowerBooks and
* iBooks. This implements the "platform-do-clockspreading" OF
* property as decoded manually on various models. For safety, we also
@ -1707,9 +1709,6 @@ core99_sleep(void)
macio->type != macio_intrepid)
return -ENODEV;
/* Disable clock spreading */
pmac_tweak_clock_spreading(macio, 0);
/* We power off the wireless slot in case it was not done
* by the driver. We don't power it on automatically however
*/
@ -1852,9 +1851,6 @@ core99_wake_up(void)
UN_OUT(UNI_N_CLOCK_CNTL, save_unin_clock_ctl);
udelay(100);
/* Enable clock spreading */
pmac_tweak_clock_spreading(macio, 1);
return 0;
}
@ -2822,7 +2818,7 @@ set_initial_features(void)
* clock spreading now. This should be a platform function but we
* don't do these at the moment
*/
pmac_tweak_clock_spreading(&macio_chips[0], 1);
pmac_tweak_clock_spreading(1);
#endif /* CONFIG_POWER4 */

9
drivers/macintosh/via-pmu.c
View file

@ -2351,6 +2351,10 @@ pmac_suspend_devices(void)
return -EBUSY;
}
/* Disable clock spreading on some machines */
pmac_tweak_clock_spreading(0);
/* Stop preemption */
preempt_disable();
/* Make sure the decrementer won't interrupt us */
@ -2417,11 +2421,12 @@ pmac_wakeup_devices(void)
/* Re-enable local CPU interrupts */
local_irq_enable();
mdelay(100);
preempt_enable();
/* Re-enable clock spreading on some machines */
pmac_tweak_clock_spreading(1);
/* Resume devices */
device_resume();

3
include/asm-ppc/pmac_feature.h
View file

@ -316,6 +316,9 @@ extern void pmac_register_agp_pm(struct pci_dev *bridge,
extern void pmac_suspend_agp_for_card(struct pci_dev *dev);
extern void pmac_resume_agp_for_card(struct pci_dev *dev);
/* Used by the via-pmu driver for suspend/resume
*/
extern void pmac_tweak_clock_spreading(int enable);
/*
* The part below is for use by macio_asic.c only, do not rely