Re: [PATCH V3] ACPI/Battery: Retry to get Battery information if failed during probing
On Monday, July 07, 2014 03:47:12 PM Lan Tianyu wrote: > Some machines'(E,G Lenovo Z480) ECs are not stable during boot up > and causes battery driver fails to be loaded due to failure of getting > battery information from EC sometimes. After several retries, the > operation will work. This patch is to retry to get battery information 5 > times if the first try fails. > > Reported-and-tested-by: naszar > Reference: https://bugzilla.kernel.org/show_bug.cgi?id=75581 > Cc: sta...@vger.kernel.org > Signed-off-by: Lan Tianyu Queued up as a fix for 3.16, thanks! > --- > Change since V1: > Change code style and add a comment. > > Change since V2: > Change code style. > > drivers/acpi/battery.c | 27 ++- > 1 file changed, 26 insertions(+), 1 deletion(-) > > diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c > index e48fc98..cee5ee8 100644 > --- a/drivers/acpi/battery.c > +++ b/drivers/acpi/battery.c > @@ -34,6 +34,7 @@ > #include > #include > #include > +#include > #include > > #ifdef CONFIG_ACPI_PROCFS_POWER > @@ -1117,6 +1118,28 @@ static struct dmi_system_id bat_dmi_table[] = { > {}, > }; > > +/* > + * Some machines'(E,G Lenovo Z480) ECs are not stable > + * during boot up and this causes battery driver fails to be > + * probed due to failure of getting battery information > + * from EC sometimes. After several retries, the operation > + * may work. So add retry code here and 20ms sleep between > + * every retries. > + */ > +static int acpi_battery_update_retry(struct acpi_battery *battery) > +{ > + int retry, ret; > + > + for (retry = 5; retry; retry--) { > + ret = acpi_battery_update(battery, false); > + if (!ret) > + break; > + > + msleep(20); > + } > + return ret; > +} > + > static int acpi_battery_add(struct acpi_device *device) > { > int result = 0; > @@ -1135,9 +1158,11 @@ static int acpi_battery_add(struct acpi_device *device) > mutex_init(>sysfs_lock); > if (acpi_has_method(battery->device->handle, "_BIX")) > set_bit(ACPI_BATTERY_XINFO_PRESENT, >flags); > - result = acpi_battery_update(battery, false); > + > + result = acpi_battery_update_retry(battery); > if (result) > goto fail; > + > #ifdef CONFIG_ACPI_PROCFS_POWER > result = acpi_battery_add_fs(device); > #endif > -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH V3] ACPI/Battery: Retry to get Battery information if failed during probing
On Monday, July 07, 2014 03:47:12 PM Lan Tianyu wrote: Some machines'(E,G Lenovo Z480) ECs are not stable during boot up and causes battery driver fails to be loaded due to failure of getting battery information from EC sometimes. After several retries, the operation will work. This patch is to retry to get battery information 5 times if the first try fails. Reported-and-tested-by: naszar nas...@ya.ru Reference: https://bugzilla.kernel.org/show_bug.cgi?id=75581 Cc: sta...@vger.kernel.org Signed-off-by: Lan Tianyu tianyu@intel.com Queued up as a fix for 3.16, thanks! --- Change since V1: Change code style and add a comment. Change since V2: Change code style. drivers/acpi/battery.c | 27 ++- 1 file changed, 26 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c index e48fc98..cee5ee8 100644 --- a/drivers/acpi/battery.c +++ b/drivers/acpi/battery.c @@ -34,6 +34,7 @@ #include linux/dmi.h #include linux/slab.h #include linux/suspend.h +#include linux/delay.h #include asm/unaligned.h #ifdef CONFIG_ACPI_PROCFS_POWER @@ -1117,6 +1118,28 @@ static struct dmi_system_id bat_dmi_table[] = { {}, }; +/* + * Some machines'(E,G Lenovo Z480) ECs are not stable + * during boot up and this causes battery driver fails to be + * probed due to failure of getting battery information + * from EC sometimes. After several retries, the operation + * may work. So add retry code here and 20ms sleep between + * every retries. + */ +static int acpi_battery_update_retry(struct acpi_battery *battery) +{ + int retry, ret; + + for (retry = 5; retry; retry--) { + ret = acpi_battery_update(battery, false); + if (!ret) + break; + + msleep(20); + } + return ret; +} + static int acpi_battery_add(struct acpi_device *device) { int result = 0; @@ -1135,9 +1158,11 @@ static int acpi_battery_add(struct acpi_device *device) mutex_init(battery-sysfs_lock); if (acpi_has_method(battery-device-handle, _BIX)) set_bit(ACPI_BATTERY_XINFO_PRESENT, battery-flags); - result = acpi_battery_update(battery, false); + + result = acpi_battery_update_retry(battery); if (result) goto fail; + #ifdef CONFIG_ACPI_PROCFS_POWER result = acpi_battery_add_fs(device); #endif -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH V3] ACPI/Battery: Retry to get Battery information if failed during probing
Some machines'(E,G Lenovo Z480) ECs are not stable during boot up and causes battery driver fails to be loaded due to failure of getting battery information from EC sometimes. After several retries, the operation will work. This patch is to retry to get battery information 5 times if the first try fails. Reported-and-tested-by: naszar Reference: https://bugzilla.kernel.org/show_bug.cgi?id=75581 Cc: sta...@vger.kernel.org Signed-off-by: Lan Tianyu --- Change since V1: Change code style and add a comment. Change since V2: Change code style. drivers/acpi/battery.c | 27 ++- 1 file changed, 26 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c index e48fc98..cee5ee8 100644 --- a/drivers/acpi/battery.c +++ b/drivers/acpi/battery.c @@ -34,6 +34,7 @@ #include #include #include +#include #include #ifdef CONFIG_ACPI_PROCFS_POWER @@ -1117,6 +1118,28 @@ static struct dmi_system_id bat_dmi_table[] = { {}, }; +/* + * Some machines'(E,G Lenovo Z480) ECs are not stable + * during boot up and this causes battery driver fails to be + * probed due to failure of getting battery information + * from EC sometimes. After several retries, the operation + * may work. So add retry code here and 20ms sleep between + * every retries. + */ +static int acpi_battery_update_retry(struct acpi_battery *battery) +{ + int retry, ret; + + for (retry = 5; retry; retry--) { + ret = acpi_battery_update(battery, false); + if (!ret) + break; + + msleep(20); + } + return ret; +} + static int acpi_battery_add(struct acpi_device *device) { int result = 0; @@ -1135,9 +1158,11 @@ static int acpi_battery_add(struct acpi_device *device) mutex_init(>sysfs_lock); if (acpi_has_method(battery->device->handle, "_BIX")) set_bit(ACPI_BATTERY_XINFO_PRESENT, >flags); - result = acpi_battery_update(battery, false); + + result = acpi_battery_update_retry(battery); if (result) goto fail; + #ifdef CONFIG_ACPI_PROCFS_POWER result = acpi_battery_add_fs(device); #endif -- 1.8.4.rc0.1.g8f6a3e5.dirty -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH V3] ACPI/Battery: Retry to get Battery information if failed during probing
Some machines'(E,G Lenovo Z480) ECs are not stable during boot up and causes battery driver fails to be loaded due to failure of getting battery information from EC sometimes. After several retries, the operation will work. This patch is to retry to get battery information 5 times if the first try fails. Reported-and-tested-by: naszar nas...@ya.ru Reference: https://bugzilla.kernel.org/show_bug.cgi?id=75581 Cc: sta...@vger.kernel.org Signed-off-by: Lan Tianyu tianyu@intel.com --- Change since V1: Change code style and add a comment. Change since V2: Change code style. drivers/acpi/battery.c | 27 ++- 1 file changed, 26 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c index e48fc98..cee5ee8 100644 --- a/drivers/acpi/battery.c +++ b/drivers/acpi/battery.c @@ -34,6 +34,7 @@ #include linux/dmi.h #include linux/slab.h #include linux/suspend.h +#include linux/delay.h #include asm/unaligned.h #ifdef CONFIG_ACPI_PROCFS_POWER @@ -1117,6 +1118,28 @@ static struct dmi_system_id bat_dmi_table[] = { {}, }; +/* + * Some machines'(E,G Lenovo Z480) ECs are not stable + * during boot up and this causes battery driver fails to be + * probed due to failure of getting battery information + * from EC sometimes. After several retries, the operation + * may work. So add retry code here and 20ms sleep between + * every retries. + */ +static int acpi_battery_update_retry(struct acpi_battery *battery) +{ + int retry, ret; + + for (retry = 5; retry; retry--) { + ret = acpi_battery_update(battery, false); + if (!ret) + break; + + msleep(20); + } + return ret; +} + static int acpi_battery_add(struct acpi_device *device) { int result = 0; @@ -1135,9 +1158,11 @@ static int acpi_battery_add(struct acpi_device *device) mutex_init(battery-sysfs_lock); if (acpi_has_method(battery-device-handle, _BIX)) set_bit(ACPI_BATTERY_XINFO_PRESENT, battery-flags); - result = acpi_battery_update(battery, false); + + result = acpi_battery_update_retry(battery); if (result) goto fail; + #ifdef CONFIG_ACPI_PROCFS_POWER result = acpi_battery_add_fs(device); #endif -- 1.8.4.rc0.1.g8f6a3e5.dirty -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/