diff options
Diffstat (limited to 'sys-kernel/mactel-linux-sources/files/2.6.26-mactel-patches-r159/applesmc-int-protect.patch')
| -rw-r--r-- | sys-kernel/mactel-linux-sources/files/2.6.26-mactel-patches-r159/applesmc-int-protect.patch | 304 |
1 files changed, 0 insertions, 304 deletions
diff --git a/sys-kernel/mactel-linux-sources/files/2.6.26-mactel-patches-r159/applesmc-int-protect.patch b/sys-kernel/mactel-linux-sources/files/2.6.26-mactel-patches-r159/applesmc-int-protect.patch deleted file mode 100644 index dcfa895..0000000 --- a/sys-kernel/mactel-linux-sources/files/2.6.26-mactel-patches-r159/applesmc-int-protect.patch +++ /dev/null @@ -1,304 +0,0 @@ -commit b69b46ff2a770621c85516dbe626a0c45b459983 - -From: Nicolas Boichat <nicolas@boichat.ch> - -AppleSMC: use interrupts to protect a block device. ---- - - drivers/hwmon/Kconfig | 7 ++ - drivers/hwmon/Makefile | 4 + - drivers/hwmon/applesmc.c | 155 +++++++++++++++++++++++++++++++++++++++++++--- - 3 files changed, 156 insertions(+), 10 deletions(-) - - -diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig -index 00ff533..23424e3 100644 ---- a/drivers/hwmon/Kconfig -+++ b/drivers/hwmon/Kconfig -@@ -799,6 +799,13 @@ config SENSORS_APPLESMC - Say Y here if you have an applicable laptop and want to experience - the awesome power of applesmc. - -+config SENSORS_APPLESMC_PROTECT -+ bool "Apple SMC - Protect block devices on shock/free fall" -+ depends on SENSORS_APPLESMC -+ default n -+ help -+ Fill in...... -+ - config HWMON_DEBUG_CHIP - bool "Hardware Monitoring Chip debugging messages" - default n -diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile -index d098677..cb60249 100644 ---- a/drivers/hwmon/Makefile -+++ b/drivers/hwmon/Makefile -@@ -77,3 +77,7 @@ ifeq ($(CONFIG_HWMON_DEBUG_CHIP),y) - EXTRA_CFLAGS += -DDEBUG - endif - -+ifeq ($(CONFIG_SENSORS_APPLESMC_PROTECT),y) -+EXTRA_CFLAGS += -DAPPLESMC_PROTECT -+endif -+ -diff --git a/drivers/hwmon/applesmc.c b/drivers/hwmon/applesmc.c -index 0c66728..7754464 100644 ---- a/drivers/hwmon/applesmc.c -+++ b/drivers/hwmon/applesmc.c -@@ -40,6 +40,12 @@ - #include <linux/hwmon.h> - #include <linux/workqueue.h> - #include <linux/interrupt.h> -+#ifdef APPLESMC_PROTECT -+#include <linux/fs.h> -+#include <linux/blkdev.h> -+#include <linux/namei.h> -+#include <linux/mount.h> -+#endif - - /* data port used by Apple SMC */ - #define APPLESMC_DATA_PORT 0x300 -@@ -176,6 +182,11 @@ static unsigned int applesmc_light; - /* Indicates which temperature sensors set to use. */ - static unsigned int applesmc_temperature_set; - -+#ifdef APPLESMC_PROTECT -+/* Device to protect in case of shock or free fall. */ -+struct block_device *bdev_protect; -+#endif -+ - static DEFINE_MUTEX(applesmc_lock); - - /* -@@ -451,6 +462,35 @@ static int applesmc_init_check_key_value(const char *key, u8 *buffer, u8 len) - return -EIO; - } - -+#ifdef APPLESMC_PROTECT -+static void protect_callback(struct work_struct *ignored) { -+ char b[BDEVNAME_SIZE]; -+ /* This code comes from queue_protect_store (block/ll_rw_blk.c) */ -+ if (bdev_protect && bdev_protect->bd_disk && -+ bdev_protect->bd_disk->queue && -+ bdev_protect->bd_disk->queue->issue_protect_fn) { -+ struct request_queue *q = bdev_protect->bd_disk->queue; -+ -+ printk(KERN_INFO "applesmc: protecting the device (%s)\n", -+ bdevname(bdev_protect, b)); -+ -+ /* Park and freeze */ -+ if (!blk_queue_stopped(q)) -+ q->issue_protect_fn(q); -+ -+ /* freeze for 2 seconds (we will receive interrupt often -+ * enough to reenable this if needed) */ -+ spin_lock_irq(q->queue_lock); -+ blk_freeze_queue(q, 2); -+ spin_unlock_irq(q->queue_lock); -+ -+ printk(KERN_INFO "applesmc: device protected\n"); -+ } -+} -+ -+static DECLARE_WORK(protect_work, protect_callback); -+#endif -+ - irqreturn_t applesmc_irq_handler(int irq, void *dev_id) - { - u8 int_type = inb(APPLESMC_INT_PORT); -@@ -472,14 +512,24 @@ irqreturn_t applesmc_irq_handler(int irq, void *dev_id) - int_type); - } - -+#ifdef APPLESMC_PROTECT -+ if (bdev_protect && bdev_protect->bd_disk && -+ bdev_protect->bd_disk->queue && -+ bdev_protect->bd_disk->queue->issue_protect_fn) { -+ schedule_work(&protect_work); -+ } -+#endif -+ - return IRQ_HANDLED; - } - - /* - * applesmc_device_init - initialize the accelerometer. Returns zero on success - * and negative error code on failure. Can sleep. -+ * - resume is true if we are waking up from a resume, so we don't need -+ * to setup interrupt handling again, and probe for a device to protect. - */ --static int applesmc_device_init(void) -+static int applesmc_device_init(int resume) - { - int total; - int ret = -ENXIO; -@@ -554,17 +604,21 @@ static int applesmc_device_init(void) - goto out; - } - -- ret1 = request_irq(APPLESMC_IRQ, applesmc_irq_handler, IRQF_DISABLED, -- "applesmc_irq_handler", NULL); -+ if (!resume) { -+ ret1 = request_irq(APPLESMC_IRQ, applesmc_irq_handler, -+ IRQF_DISABLED, "applesmc_irq_handler", -+ NULL); - -- if (ret1) { -- printk(KERN_WARNING "applesmc: cannot setup irq handler\n"); -- } -+ if (ret1) { -+ printk(KERN_WARNING "applesmc: cannot setup " -+ "irq handler\n"); -+ } - -- printk(KERN_DEBUG "applesmc: accelerometer " -+ printk(KERN_DEBUG "applesmc: accelerometer " - "successfully initialized.\n"); -- ret = 0; -+ } - -+ ret = 0; - out: - mutex_unlock(&applesmc_lock); - return ret; -@@ -595,7 +649,7 @@ static int applesmc_probe(struct platform_device *dev) - { - int ret; - -- ret = applesmc_device_init(); -+ ret = applesmc_device_init(0); - if (ret) - return ret; - -@@ -605,7 +659,7 @@ static int applesmc_probe(struct platform_device *dev) - - static int applesmc_resume(struct platform_device *dev) - { -- return applesmc_device_init(); -+ return applesmc_device_init(1); - } - - static int applesmc_remove(struct platform_device *dev) -@@ -911,6 +965,46 @@ static ssize_t applesmc_calibrate_store(struct device *dev, - return count; - } - -+#ifdef APPLESMC_PROTECT -+static ssize_t applesmc_protect_device_show(struct device *dev, -+ struct device_attribute *attr, char *sysfsbuf) -+{ -+ char b[BDEVNAME_SIZE]; -+ -+ return snprintf(sysfsbuf, PAGE_SIZE, "%s\n", bdevname(bdev_protect, b)); -+} -+ -+static ssize_t applesmc_protect_device_store(struct device *dev, -+ struct device_attribute *attr, const char *sysfsbuf, size_t count) -+{ -+ char b[BDEVNAME_SIZE]; -+ struct block_device *bdev; -+ -+ if (bdev_protect) -+ bdput(bdev_protect); -+ -+ bdev = lookup_bdev(sysfsbuf); -+ -+ if (IS_ERR(bdev)) { -+ bdev_protect = NULL; -+ return -EIO; /* Could be more precise? */ -+ } -+ -+ if (bdev->bd_disk && bdev->bd_disk->queue -+ && bdev->bd_disk->queue->issue_protect_fn) { -+ bdev_protect = bdev; -+ printk(KERN_INFO "applesmc: accelerometer will now " -+ "protect %s.\n", bdevname(bdev, b)); -+ return count; -+ } -+ else { -+ bdput(bdev); -+ bdev_protect = NULL; -+ return -EIO; /* Could be more precise? */ -+ } -+} -+#endif -+ - /* Store the next backlight value to be written by the work */ - static unsigned int backlight_value; - -@@ -1215,6 +1309,10 @@ static DEVICE_ATTR(name, 0444, applesmc_name_show, NULL); - static DEVICE_ATTR(position, 0444, applesmc_position_show, NULL); - static DEVICE_ATTR(calibrate, 0644, - applesmc_calibrate_show, applesmc_calibrate_store); -+#ifdef APPLESMC_PROTECT -+static DEVICE_ATTR(protect_device, 0644, -+ applesmc_protect_device_show, applesmc_protect_device_store); -+#endif - static SENSOR_DEVICE_ATTR(low_norm_trigger_interval, 0644, - applesmc_accelerometer_show, applesmc_accelerometer_store, 0); - static SENSOR_DEVICE_ATTR(high_norm_trigger_interval, 0644, -@@ -1227,6 +1325,9 @@ static SENSOR_DEVICE_ATTR(high_norm_trigger, 0644, - static struct attribute *accelerometer_attributes[] = { - &dev_attr_position.attr, - &dev_attr_calibrate.attr, -+#ifdef APPLESMC_PROTECT -+ &dev_attr_protect_device.attr, -+#endif - &sensor_dev_attr_low_norm_trigger.dev_attr.attr, - &sensor_dev_attr_high_norm_trigger.dev_attr.attr, - &sensor_dev_attr_low_norm_trigger_interval.dev_attr.attr, -@@ -1467,6 +1568,10 @@ static int applesmc_create_accelerometer(void) - { - struct input_dev *idev; - int ret; -+#ifdef APPLESMC_PROTECT -+ char b[BDEVNAME_SIZE]; -+ int major, minor; -+#endif - - /* initial calibrate for the input device */ - ret = applesmc_calibrate(); -@@ -1504,6 +1609,30 @@ static int applesmc_create_accelerometer(void) - if (ret) - goto out_idev; - -+#ifdef APPLESMC_PROTECT -+ /* Try to find a suitable block device to protect */ -+ bdev_protect = NULL; -+ major = SCSI_DISK0_MAJOR; -+ -+ /* Iterate over a maximum of 16 SCSI devices to find one that -+ * can be protected. -+ * Note: other devices could also be protected. */ -+ for (minor = 0; minor < 256; minor += 16) { -+ dev_t dev = MKDEV(major, minor); -+ struct block_device *bdev = bdget(dev); -+ if (bdev->bd_disk && bdev->bd_disk->queue -+ && bdev->bd_disk->queue->issue_protect_fn) { -+ bdev_protect = bdev; -+ printk(KERN_INFO "applesmc: accelerometer " -+ "will protect %s (%d:%d).\n", -+ bdevname(bdev, b), -+ major, minor); -+ break; -+ } -+ bdput(bdev); -+ } -+#endif -+ - return 0; - - out_idev: -@@ -1523,6 +1652,12 @@ static void applesmc_release_accelerometer(void) - input_unregister_polled_device(applesmc_idev); - input_free_polled_device(applesmc_idev); - sysfs_remove_group(&pdev->dev.kobj, &accelerometer_attributes_group); -+#ifdef APPLESMC_PROTECT -+ if (bdev_protect) { -+ bdput(bdev_protect); -+ bdev_protect = NULL; -+ } -+#endif - } - - static __initdata struct dmi_match_data applesmc_dmi_data[] = { |