Open code mei_hw_reset to avoid using cached hcsr. Using cached hcsr can cause unwanted side effects.
Move mei_hw_restet function to hw-me.c as it is hw dependent Signed-off-by: Tomas Winkler <[email protected]> --- drivers/misc/mei/hw-me.c | 35 +++++++++++++++++++++++++++++++++++ drivers/misc/mei/init.c | 28 ---------------------------- drivers/misc/mei/mei_dev.h | 1 + 3 files changed, 36 insertions(+), 28 deletions(-) diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c index 1e82e33..ec4ab89 100644 --- a/drivers/misc/mei/hw-me.c +++ b/drivers/misc/mei/hw-me.c @@ -132,6 +132,41 @@ void mei_disable_interrupts(struct mei_device *dev) mei_hcsr_set(dev); } +/** + * mei_hw_reset - resets fw via mei csr register. + * + * @dev: the device structure + * @interrupts_enabled: if interrupt should be enabled after reset. + */ +void mei_hw_reset(struct mei_device *dev, bool intr_enable) +{ + u32 hcsr = mei_hcsr_read(dev); + + dev_dbg(&dev->pdev->dev, "before reset HCSR = 0x%08x.\n", hcsr); + + hcsr |= (H_RST | H_IG); + + if (intr_enable) + hcsr |= H_IE; + else + hcsr &= ~H_IE; + + hcsr &= ~H_IS; + + mei_reg_write(dev, H_CSR, hcsr); + hcsr = mei_hcsr_read(dev); + + hcsr &= ~H_RST; + hcsr |= H_IG; + hcsr &= ~H_IS; + + mei_reg_write(dev, H_CSR, hcsr); + + hcsr = mei_hcsr_read(dev); + + dev_dbg(&dev->pdev->dev, "current HCSR = 0x%08x.\n", hcsr); +} + /** * mei_interrupt_quick_handler - The ISR of the MEI device diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c index 2391832..5c2054d 100644 --- a/drivers/misc/mei/init.c +++ b/drivers/misc/mei/init.c @@ -170,22 +170,6 @@ out: } /** - * mei_hw_reset - resets fw via mei csr register. - * - * @dev: the device structure - * @interrupts_enabled: if interrupt should be enabled after reset. - */ -static void mei_hw_reset(struct mei_device *dev, int interrupts_enabled) -{ - dev->host_hw_state |= (H_RST | H_IG); - - if (interrupts_enabled) - mei_enable_interrupts(dev); - else - mei_disable_interrupts(dev); -} - -/** * mei_reset - resets host and fw. * * @dev: the device structure @@ -207,20 +191,8 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled) dev->dev_state != MEI_DEV_POWER_DOWN && dev->dev_state != MEI_DEV_POWER_UP); - dev->host_hw_state = mei_hcsr_read(dev); - - dev_dbg(&dev->pdev->dev, "before reset host_hw_state = 0x%08x.\n", - dev->host_hw_state); - mei_hw_reset(dev, interrupts_enabled); - dev->host_hw_state &= ~H_RST; - dev->host_hw_state |= H_IG; - - mei_hcsr_set(dev); - - dev_dbg(&dev->pdev->dev, "currently saved host_hw_state = 0x%08x.\n", - dev->host_hw_state); if (dev->dev_state != MEI_DEV_INITIALIZING) { if (dev->dev_state != MEI_DEV_DISABLED && diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index 88fa194..8692ac8 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -385,6 +385,7 @@ void mei_watchdog_unregister(struct mei_device *dev); * Register Access Function */ +void mei_hw_reset(struct mei_device *dev, bool intr_enable); u32 mei_hcsr_read(const struct mei_device *dev); void mei_hcsr_set(struct mei_device *dev); u32 mei_mecsr_read(const struct mei_device *dev); -- 1.7.4.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
