diff options
| -rw-r--r-- | drivers/scsi/scsi_error.c | 94 |
1 files changed, 49 insertions, 45 deletions
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index 991de3c15cfc..633c2395a92a 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -3,14 +3,14 @@ * * SCSI error/timeout handling * Initial versions: Eric Youngdale. Based upon conversations with - * Leonard Zubkoff and David Miller at Linux Expo, + * Leonard Zubkoff and David Miller at Linux Expo, * ideas originating from all over the place. * * Restructured scsi_unjam_host and associated functions. * September 04, 2002 Mike Anderson (andmike@us.ibm.com) * * Forward port of Russell King's (rmk@arm.linux.org.uk) changes and - * minor cleanups. + * minor cleanups. * September 30, 2002 Mike Anderson (andmike@us.ibm.com) */ @@ -129,14 +129,15 @@ enum blk_eh_timer_return scsi_times_out(struct request *req) { struct scsi_cmnd *scmd = req->special; enum blk_eh_timer_return rtn = BLK_EH_NOT_HANDLED; + struct Scsi_Host *host = scmd->device->host; trace_scsi_dispatch_cmd_timeout(scmd); scsi_log_completion(scmd, TIMEOUT_ERROR); - if (scmd->device->host->transportt->eh_timed_out) - rtn = scmd->device->host->transportt->eh_timed_out(scmd); - else if (scmd->device->host->hostt->eh_timed_out) - rtn = scmd->device->host->hostt->eh_timed_out(scmd); + if (host->transportt->eh_timed_out) + rtn = host->transportt->eh_timed_out(scmd); + else if (host->hostt->eh_timed_out) + rtn = host->hostt->eh_timed_out(scmd); if (unlikely(rtn == BLK_EH_NOT_HANDLED && !scsi_eh_scmd_add(scmd, SCSI_EH_CANCEL_CMD))) { @@ -195,7 +196,7 @@ static inline void scsi_eh_prt_fail_stats(struct Scsi_Host *shost, ++total_failures; if (scmd->eh_eflags & SCSI_EH_CANCEL_CMD) ++cmd_cancel; - else + else ++cmd_failed; } } @@ -214,7 +215,7 @@ static inline void scsi_eh_prt_fail_stats(struct Scsi_Host *shost, SCSI_LOG_ERROR_RECOVERY(2, printk("Total of %d commands on %d" " devices require eh work\n", - total_failures, devices_failed)); + total_failures, devices_failed)); } #endif @@ -294,7 +295,7 @@ static int scsi_check_sense(struct scsi_cmnd *scmd) return NEEDS_RETRY; } /* - * if the device is in the process of becoming ready, we + * if the device is in the process of becoming ready, we * should retry. */ if ((sshdr.asc == 0x04) && (sshdr.ascq == 0x01)) @@ -488,7 +489,7 @@ static int scsi_eh_completed_normally(struct scsi_cmnd *scmd) */ static void scsi_eh_done(struct scsi_cmnd *scmd) { - struct completion *eh_action; + struct completion *eh_action; SCSI_LOG_ERROR_RECOVERY(3, printk("%s scmd: %p result: %x\n", @@ -507,22 +508,23 @@ static int scsi_try_host_reset(struct scsi_cmnd *scmd) { unsigned long flags; int rtn; + struct Scsi_Host *host = scmd->device->host; + struct scsi_host_template *hostt = host->hostt; SCSI_LOG_ERROR_RECOVERY(3, printk("%s: Snd Host RST\n", __func__)); - if (!scmd->device->host->hostt->eh_host_reset_handler) + if (!hostt->eh_host_reset_handler) return FAILED; - rtn = scmd->device->host->hostt->eh_host_reset_handler(scmd); + rtn = hostt->eh_host_reset_handler(scmd); if (rtn == SUCCESS) { - if (!scmd->device->host->hostt->skip_settle_delay) + if (!hostt->skip_settle_delay) ssleep(HOST_RESET_SETTLE_TIME); - spin_lock_irqsave(scmd->device->host->host_lock, flags); - scsi_report_bus_reset(scmd->device->host, - scmd_channel(scmd)); - spin_unlock_irqrestore(scmd->device->host->host_lock, flags); + spin_lock_irqsave(host->host_lock, flags); + scsi_report_bus_reset(host, scmd_channel(scmd)); + spin_unlock_irqrestore(host->host_lock, flags); } return rtn; @@ -536,22 +538,23 @@ static int scsi_try_bus_reset(struct scsi_cmnd *scmd) { unsigned long flags; int rtn; + struct Scsi_Host *host = scmd->device->host; + struct scsi_host_template *hostt = host->hostt; SCSI_LOG_ERROR_RECOVERY(3, printk("%s: Snd Bus RST\n", __func__)); - if (!scmd->device->host->hostt->eh_bus_reset_handler) + if (!hostt->eh_bus_reset_handler) return FAILED; - rtn = scmd->device->host->hostt->eh_bus_reset_handler(scmd); + rtn = hostt->eh_bus_reset_handler(scmd); if (rtn == SUCCESS) { - if (!scmd->device->host->hostt->skip_settle_delay) + if (!hostt->skip_settle_delay) ssleep(BUS_RESET_SETTLE_TIME); - spin_lock_irqsave(scmd->device->host->host_lock, flags); - scsi_report_bus_reset(scmd->device->host, - scmd_channel(scmd)); - spin_unlock_irqrestore(scmd->device->host->host_lock, flags); + spin_lock_irqsave(host->host_lock, flags); + scsi_report_bus_reset(host, scmd_channel(scmd)); + spin_unlock_irqrestore(host->host_lock, flags); } return rtn; @@ -577,16 +580,18 @@ static int scsi_try_target_reset(struct scsi_cmnd *scmd) { unsigned long flags; int rtn; + struct Scsi_Host *host = scmd->device->host; + struct scsi_host_template *hostt = host->hostt; - if (!scmd->device->host->hostt->eh_target_reset_handler) + if (!hostt->eh_target_reset_handler) return FAILED; - rtn = scmd->device->host->hostt->eh_target_reset_handler(scmd); + rtn = hostt->eh_target_reset_handler(scmd); if (rtn == SUCCESS) { - spin_lock_irqsave(scmd->device->host->host_lock, flags); + spin_lock_irqsave(host->host_lock, flags); __starget_for_each_device(scsi_target(scmd->device), NULL, __scsi_report_device_reset); - spin_unlock_irqrestore(scmd->device->host->host_lock, flags); + spin_unlock_irqrestore(host->host_lock, flags); } return rtn; @@ -605,27 +610,28 @@ static int scsi_try_target_reset(struct scsi_cmnd *scmd) static int scsi_try_bus_device_reset(struct scsi_cmnd *scmd) { int rtn; + struct scsi_host_template *hostt = scmd->device->host->hostt; - if (!scmd->device->host->hostt->eh_device_reset_handler) + if (!hostt->eh_device_reset_handler) return FAILED; - rtn = scmd->device->host->hostt->eh_device_reset_handler(scmd); + rtn = hostt->eh_device_reset_handler(scmd); if (rtn == SUCCESS) __scsi_report_device_reset(scmd->device, NULL); return rtn; } -static int scsi_try_to_abort_cmd(struct scsi_cmnd *scmd) +static int scsi_try_to_abort_cmd(struct scsi_host_template *hostt, struct scsi_cmnd *scmd) { - if (!scmd->device->host->hostt->eh_abort_handler) + if (!hostt->eh_abort_handler) return FAILED; - return scmd->device->host->hostt->eh_abort_handler(scmd); + return hostt->eh_abort_handler(scmd); } static void scsi_abort_eh_cmnd(struct scsi_cmnd *scmd) { - if (scsi_try_to_abort_cmd(scmd) != SUCCESS) + if (scsi_try_to_abort_cmd(scmd->device->host->hostt, scmd) != SUCCESS) if (scsi_try_bus_device_reset(scmd) != SUCCESS) if (scsi_try_target_reset(scmd) != SUCCESS) if (scsi_try_bus_reset(scmd) != SUCCESS) @@ -846,7 +852,7 @@ EXPORT_SYMBOL(scsi_eh_finish_cmd); * * Description: * See if we need to request sense information. if so, then get it - * now, so we have a better idea of what to do. + * now, so we have a better idea of what to do. * * Notes: * This has the unfortunate side effect that if a shost adapter does @@ -958,7 +964,7 @@ static int scsi_eh_abort_cmds(struct list_head *work_q, SCSI_LOG_ERROR_RECOVERY(3, printk("%s: aborting cmd:" "0x%p\n", current->comm, scmd)); - rtn = scsi_try_to_abort_cmd(scmd); + rtn = scsi_try_to_abort_cmd(scmd->device->host->hostt, scmd); if (rtn == SUCCESS || rtn == FAST_IO_FAIL) { scmd->eh_eflags &= ~SCSI_EH_CANCEL_CMD; if (!scsi_device_online(scmd->device) || @@ -966,7 +972,6 @@ static int scsi_eh_abort_cmds(struct list_head *work_q, !scsi_eh_tur(scmd)) { scsi_eh_finish_cmd(scmd, done_q); } - } else SCSI_LOG_ERROR_RECOVERY(3, printk("%s: aborting" " cmd failed:" @@ -1010,7 +1015,7 @@ static int scsi_eh_try_stu(struct scsi_cmnd *scmd) * * Notes: * If commands are failing due to not ready, initializing command required, - * try revalidating the device, which will end up sending a start unit. + * try revalidating the device, which will end up sending a start unit. */ static int scsi_eh_stu(struct Scsi_Host *shost, struct list_head *work_q, @@ -1064,7 +1069,7 @@ static int scsi_eh_stu(struct Scsi_Host *shost, * Try a bus device reset. Still, look to see whether we have multiple * devices that are jammed or not - if we have multiple devices, it * makes no sense to try bus_device_reset - we really would need to try - * a bus_reset instead. + * a bus_reset instead. */ static int scsi_eh_bus_device_reset(struct Scsi_Host *shost, struct list_head *work_q, @@ -1164,7 +1169,7 @@ static int scsi_eh_target_reset(struct Scsi_Host *shost, } /** - * scsi_eh_bus_reset - send a bus reset + * scsi_eh_bus_reset - send a bus reset * @shost: &scsi host being recovered. * @work_q: &list_head for pending commands. * @done_q: &list_head for processed commands. @@ -1181,7 +1186,7 @@ static int scsi_eh_bus_reset(struct Scsi_Host *shost, * we really want to loop over the various channels, and do this on * a channel by channel basis. we should also check to see if any * of the failed commands are on soft_reset devices, and if so, skip - * the reset. + * the reset. */ for (channel = 0; channel <= shost->max_channel; channel++) { @@ -1223,7 +1228,7 @@ static int scsi_eh_bus_reset(struct Scsi_Host *shost, } /** - * scsi_eh_host_reset - send a host reset + * scsi_eh_host_reset - send a host reset * @work_q: list_head for processed commands. * @done_q: list_head for processed commands. */ @@ -1376,7 +1381,7 @@ int scsi_decide_disposition(struct scsi_cmnd *scmd) return SUCCESS; /* * when the low level driver returns did_soft_error, - * it is responsible for keeping an internal retry counter + * it is responsible for keeping an internal retry counter * in order to avoid endless loops (db) * * actually this is a bug in this function here. we should @@ -1414,7 +1419,6 @@ int scsi_decide_disposition(struct scsi_cmnd *scmd) */ break; /* fallthrough */ - case DID_BUS_BUSY: case DID_PARITY: goto maybe_retry; @@ -1982,7 +1986,7 @@ int scsi_normalize_sense(const u8 *sense_buffer, int sb_len, if (sb_len > 7) sshdr->additional_length = sense_buffer[7]; } else { - /* + /* * fixed format */ if (sb_len > 2) |