Re: [PATCH 1/2] acpi : cpu hot-remove returns error when cpu_down() fails
Hi Rafael, 2012/10/19 10:06, Rafael J. Wysocki wrote: On Friday 28 of September 2012 19:36:02 Yasuaki Ishimatsu wrote: Even if cpu_down() fails, acpi_processor_remove() continues to remove the cpu. But in this case, it should return error number since some process may run on the cpu. If the cpu has a running process and the cpu is turned the power off, the system may not work well. Reviewed-by: Srivatsa S. Bhat Reviewed-by: Toshi Kani Signed-off-by: Yasuaki Ishimatsu --- drivers/acpi/processor_driver.c | 18 -- 1 file changed, 12 insertions(+), 6 deletions(-) Index: linux-3.6-rc7/drivers/acpi/processor_driver.c === --- linux-3.6-rc7.orig/drivers/acpi/processor_driver.c 2012-09-24 10:10:57.0 +0900 +++ linux-3.6-rc7/drivers/acpi/processor_driver.c 2012-09-28 19:16:33.207858261 +0900 @@ -605,7 +605,7 @@ err_free_pr: static int acpi_processor_remove(struct acpi_device *device, int type) { struct acpi_processor *pr = NULL; - + int ret; if (!device || !acpi_driver_data(device)) return -EINVAL; @@ -616,8 +616,9 @@ static int acpi_processor_remove(struct goto free; if (type == ACPI_BUS_REMOVAL_EJECT) { - if (acpi_processor_handle_eject(pr)) - return -EINVAL; + ret = acpi_processor_handle_eject(pr); + if (ret) + return ret; } acpi_processor_power_exit(pr, device); @@ -848,12 +849,17 @@ static acpi_status acpi_processor_hotadd static int acpi_processor_handle_eject(struct acpi_processor *pr) { - if (cpu_online(pr->id)) - cpu_down(pr->id); + int ret = 0; + + if (cpu_online(pr->id)) { + ret = cpu_down(pr->id); If you defined ret here ... + if (ret) + return ret; + } arch_unregister_cpu(pr->id); acpi_unmap_lsapic(pr->id); - return (0); + return ret; ... this line wouldn't need to be changed. Thank you for your review. O.K. I'll put the return code back. Thanks, Yasuaki Ishimatsu } #else static acpi_status acpi_processor_hotadd_init(struct acpi_processor *pr) Thanks, Rafael -- 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 1/2] acpi : cpu hot-remove returns error when cpu_down() fails
On Friday 28 of September 2012 19:36:02 Yasuaki Ishimatsu wrote: > Even if cpu_down() fails, acpi_processor_remove() continues to remove the cpu. > But in this case, it should return error number since some process may run on > the cpu. If the cpu has a running process and the cpu is turned the power off, > the system may not work well. > > Reviewed-by: Srivatsa S. Bhat > Reviewed-by: Toshi Kani > Signed-off-by: Yasuaki Ishimatsu > > --- > drivers/acpi/processor_driver.c | 18 -- > 1 file changed, 12 insertions(+), 6 deletions(-) > > Index: linux-3.6-rc7/drivers/acpi/processor_driver.c > === > --- linux-3.6-rc7.orig/drivers/acpi/processor_driver.c2012-09-24 > 10:10:57.0 +0900 > +++ linux-3.6-rc7/drivers/acpi/processor_driver.c 2012-09-28 > 19:16:33.207858261 +0900 > @@ -605,7 +605,7 @@ err_free_pr: > static int acpi_processor_remove(struct acpi_device *device, int type) > { > struct acpi_processor *pr = NULL; > - > + int ret; > > if (!device || !acpi_driver_data(device)) > return -EINVAL; > @@ -616,8 +616,9 @@ static int acpi_processor_remove(struct > goto free; > > if (type == ACPI_BUS_REMOVAL_EJECT) { > - if (acpi_processor_handle_eject(pr)) > - return -EINVAL; > + ret = acpi_processor_handle_eject(pr); > + if (ret) > + return ret; > } > > acpi_processor_power_exit(pr, device); > @@ -848,12 +849,17 @@ static acpi_status acpi_processor_hotadd > > static int acpi_processor_handle_eject(struct acpi_processor *pr) > { > - if (cpu_online(pr->id)) > - cpu_down(pr->id); > + int ret = 0; > + > + if (cpu_online(pr->id)) { > + ret = cpu_down(pr->id); If you defined ret here ... > + if (ret) > + return ret; > + } > > arch_unregister_cpu(pr->id); > acpi_unmap_lsapic(pr->id); > - return (0); > + return ret; ... this line wouldn't need to be changed. > } > #else > static acpi_status acpi_processor_hotadd_init(struct acpi_processor *pr) Thanks, Rafael -- 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 1/2] acpi : cpu hot-remove returns error when cpu_down() fails
On Friday 28 of September 2012 19:36:02 Yasuaki Ishimatsu wrote: Even if cpu_down() fails, acpi_processor_remove() continues to remove the cpu. But in this case, it should return error number since some process may run on the cpu. If the cpu has a running process and the cpu is turned the power off, the system may not work well. Reviewed-by: Srivatsa S. Bhat srivatsa.b...@linux.vnet.ibm.com Reviewed-by: Toshi Kani toshi.k...@hp.com Signed-off-by: Yasuaki Ishimatsu isimatu.yasu...@jp.fujitsu.com --- drivers/acpi/processor_driver.c | 18 -- 1 file changed, 12 insertions(+), 6 deletions(-) Index: linux-3.6-rc7/drivers/acpi/processor_driver.c === --- linux-3.6-rc7.orig/drivers/acpi/processor_driver.c2012-09-24 10:10:57.0 +0900 +++ linux-3.6-rc7/drivers/acpi/processor_driver.c 2012-09-28 19:16:33.207858261 +0900 @@ -605,7 +605,7 @@ err_free_pr: static int acpi_processor_remove(struct acpi_device *device, int type) { struct acpi_processor *pr = NULL; - + int ret; if (!device || !acpi_driver_data(device)) return -EINVAL; @@ -616,8 +616,9 @@ static int acpi_processor_remove(struct goto free; if (type == ACPI_BUS_REMOVAL_EJECT) { - if (acpi_processor_handle_eject(pr)) - return -EINVAL; + ret = acpi_processor_handle_eject(pr); + if (ret) + return ret; } acpi_processor_power_exit(pr, device); @@ -848,12 +849,17 @@ static acpi_status acpi_processor_hotadd static int acpi_processor_handle_eject(struct acpi_processor *pr) { - if (cpu_online(pr-id)) - cpu_down(pr-id); + int ret = 0; + + if (cpu_online(pr-id)) { + ret = cpu_down(pr-id); If you defined ret here ... + if (ret) + return ret; + } arch_unregister_cpu(pr-id); acpi_unmap_lsapic(pr-id); - return (0); + return ret; ... this line wouldn't need to be changed. } #else static acpi_status acpi_processor_hotadd_init(struct acpi_processor *pr) Thanks, Rafael -- 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 1/2] acpi : cpu hot-remove returns error when cpu_down() fails
Hi Rafael, 2012/10/19 10:06, Rafael J. Wysocki wrote: On Friday 28 of September 2012 19:36:02 Yasuaki Ishimatsu wrote: Even if cpu_down() fails, acpi_processor_remove() continues to remove the cpu. But in this case, it should return error number since some process may run on the cpu. If the cpu has a running process and the cpu is turned the power off, the system may not work well. Reviewed-by: Srivatsa S. Bhat srivatsa.b...@linux.vnet.ibm.com Reviewed-by: Toshi Kani toshi.k...@hp.com Signed-off-by: Yasuaki Ishimatsu isimatu.yasu...@jp.fujitsu.com --- drivers/acpi/processor_driver.c | 18 -- 1 file changed, 12 insertions(+), 6 deletions(-) Index: linux-3.6-rc7/drivers/acpi/processor_driver.c === --- linux-3.6-rc7.orig/drivers/acpi/processor_driver.c 2012-09-24 10:10:57.0 +0900 +++ linux-3.6-rc7/drivers/acpi/processor_driver.c 2012-09-28 19:16:33.207858261 +0900 @@ -605,7 +605,7 @@ err_free_pr: static int acpi_processor_remove(struct acpi_device *device, int type) { struct acpi_processor *pr = NULL; - + int ret; if (!device || !acpi_driver_data(device)) return -EINVAL; @@ -616,8 +616,9 @@ static int acpi_processor_remove(struct goto free; if (type == ACPI_BUS_REMOVAL_EJECT) { - if (acpi_processor_handle_eject(pr)) - return -EINVAL; + ret = acpi_processor_handle_eject(pr); + if (ret) + return ret; } acpi_processor_power_exit(pr, device); @@ -848,12 +849,17 @@ static acpi_status acpi_processor_hotadd static int acpi_processor_handle_eject(struct acpi_processor *pr) { - if (cpu_online(pr-id)) - cpu_down(pr-id); + int ret = 0; + + if (cpu_online(pr-id)) { + ret = cpu_down(pr-id); If you defined ret here ... + if (ret) + return ret; + } arch_unregister_cpu(pr-id); acpi_unmap_lsapic(pr-id); - return (0); + return ret; ... this line wouldn't need to be changed. Thank you for your review. O.K. I'll put the return code back. Thanks, Yasuaki Ishimatsu } #else static acpi_status acpi_processor_hotadd_init(struct acpi_processor *pr) Thanks, Rafael -- 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/