| Message ID | 20230928073543.3496394-1-haowenchao2@huawei.com |
|---|---|
| Headers | show |
| Series | SCSI: Fix issues between removing device and error handle | expand |
On 2023/9/28 15:35, Wenchao Hao wrote: > I am testing SCSI error handle with my previous scsi_debug error > injection patches, and found some issues when removing device and > error handler happened together. > > These issues are triggered because devices in removing would be skipped > when calling shost_for_each_device(). > ping... > Three issues are found: > 1. statistic info printed at beginning of scsi_error_handler is wrong > 2. device reset is not triggered > 3. IO requeued to request_queue would be hang after error handle > > V2: > - Fix IO hang by run all devices' queue after error handler > - Do not modify shost_for_each_device() directly but add a new > helper to iterate devices but do not skip devices in removing > > Wenchao Hao (4): > scsi: core: Add new helper to iterate all devices of host > scsi: scsi_error: Fix wrong statistic when print error info > scsi: scsi_error: Fix device reset is not triggered > scsi: scsi_core: Fix IO hang when device removing > > drivers/scsi/scsi.c | 43 +++++++++++++++++++++++++------------- > drivers/scsi/scsi_error.c | 4 ++-- > drivers/scsi/scsi_lib.c | 2 +- > include/scsi/scsi_device.h | 25 +++++++++++++++++++--- > 4 files changed, 53 insertions(+), 21 deletions(-) >
On 2023/9/28 15:35, Wenchao Hao wrote: > I am testing SCSI error handle with my previous scsi_debug error > injection patches, and found some issues when removing device and > error handler happened together. > > These issues are triggered because devices in removing would be skipped > when calling shost_for_each_device(). > > Three issues are found: > 1. statistic info printed at beginning of scsi_error_handler is wrong > 2. device reset is not triggered > 3. IO requeued to request_queue would be hang after error handle > These patches fix bug which is easy to recurrent when removing device and error handle happened together, so friendly ping again... > V2: > - Fix IO hang by run all devices' queue after error handler > - Do not modify shost_for_each_device() directly but add a new > helper to iterate devices but do not skip devices in removing > > Wenchao Hao (4): > scsi: core: Add new helper to iterate all devices of host > scsi: scsi_error: Fix wrong statistic when print error info > scsi: scsi_error: Fix device reset is not triggered > scsi: scsi_core: Fix IO hang when device removing > > drivers/scsi/scsi.c | 43 +++++++++++++++++++++++++------------- > drivers/scsi/scsi_error.c | 4 ++-- > drivers/scsi/scsi_lib.c | 2 +- > include/scsi/scsi_device.h | 25 +++++++++++++++++++--- > 4 files changed, 53 insertions(+), 21 deletions(-) >
I am testing SCSI error handle with my previous scsi_debug error injection patches, and found some issues when removing device and error handler happened together. These issues are triggered because devices in removing would be skipped when calling shost_for_each_device(). Three issues are found: 1. statistic info printed at beginning of scsi_error_handler is wrong 2. device reset is not triggered 3. IO requeued to request_queue would be hang after error handle V2: - Fix IO hang by run all devices' queue after error handler - Do not modify shost_for_each_device() directly but add a new helper to iterate devices but do not skip devices in removing Wenchao Hao (4): scsi: core: Add new helper to iterate all devices of host scsi: scsi_error: Fix wrong statistic when print error info scsi: scsi_error: Fix device reset is not triggered scsi: scsi_core: Fix IO hang when device removing drivers/scsi/scsi.c | 43 +++++++++++++++++++++++++------------- drivers/scsi/scsi_error.c | 4 ++-- drivers/scsi/scsi_lib.c | 2 +- include/scsi/scsi_device.h | 25 +++++++++++++++++++--- 4 files changed, 53 insertions(+), 21 deletions(-)