X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fscsi%2Fscsi_error.c;h=045a0868fc7b4540ac53676206ab1f5136355f13;hb=203a512f0976e8ba85df36d76b40af6c80239121;hp=d29f8464b74fadd26de9e5535ede03cfa21d08dd;hpb=df3d80f5a5c74168be42788364d13cf6c83c7b9c;p=linux-2.6-omap-h63xx.git diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index d29f8464b74..045a0868fc7 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -24,7 +24,6 @@ #include #include #include -#include #include #include @@ -63,7 +62,7 @@ void scsi_eh_wakeup(struct Scsi_Host *shost) * @shost: SCSI host to invoke error handling on. * * Schedule SCSI EH without scmd. - **/ + */ void scsi_schedule_eh(struct Scsi_Host *shost) { unsigned long flags; @@ -87,7 +86,7 @@ EXPORT_SYMBOL_GPL(scsi_schedule_eh); * * Return value: * 0 on failure. - **/ + */ int scsi_eh_scmd_add(struct scsi_cmnd *scmd, int eh_flag) { struct Scsi_Host *shost = scmd->device->host; @@ -122,7 +121,7 @@ int scsi_eh_scmd_add(struct scsi_cmnd *scmd, int eh_flag) * This should be turned into an inline function. Each scsi command * has its own timer, and as it is added to the queue, we set up the * timer. When the command completes, we cancel the timer. - **/ + */ void scsi_add_timer(struct scsi_cmnd *scmd, int timeout, void (*complete)(struct scsi_cmnd *)) { @@ -156,7 +155,7 @@ void scsi_add_timer(struct scsi_cmnd *scmd, int timeout, * Return value: * 1 if we were able to detach the timer. 0 if we blew it, and the * timer function has already started to run. - **/ + */ int scsi_delete_timer(struct scsi_cmnd *scmd) { int rtn; @@ -182,7 +181,7 @@ int scsi_delete_timer(struct scsi_cmnd *scmd) * only in that the normal completion handling might run, but if the * normal completion function determines that the timer has already * fired, then it mustn't do anything. - **/ + */ void scsi_times_out(struct scsi_cmnd *scmd) { enum scsi_eh_timer_return (* eh_timed_out)(struct scsi_cmnd *); @@ -225,7 +224,7 @@ void scsi_times_out(struct scsi_cmnd *scmd) * * Return value: * 0 when dev was taken offline by error recovery. 1 OK to proceed. - **/ + */ int scsi_block_when_processing_errors(struct scsi_device *sdev) { int online; @@ -246,7 +245,7 @@ EXPORT_SYMBOL(scsi_block_when_processing_errors); * scsi_eh_prt_fail_stats - Log info on failures. * @shost: scsi host being recovered. * @work_q: Queue of scsi cmds to process. - **/ + */ static inline void scsi_eh_prt_fail_stats(struct Scsi_Host *shost, struct list_head *work_q) { @@ -296,7 +295,7 @@ static inline void scsi_eh_prt_fail_stats(struct Scsi_Host *shost, * Notes: * When a deferred error is detected the current command has * not been executed and needs retrying. - **/ + */ static int scsi_check_sense(struct scsi_cmnd *scmd) { struct scsi_sense_hdr sshdr; @@ -399,7 +398,7 @@ static int scsi_check_sense(struct scsi_cmnd *scmd) * queued during error recovery. the main difference here is that we * don't allow for the possibility of retries here, and we are a lot * more restrictive about what we consider acceptable. - **/ + */ static int scsi_eh_completed_normally(struct scsi_cmnd *scmd) { /* @@ -453,7 +452,7 @@ static int scsi_eh_completed_normally(struct scsi_cmnd *scmd) /** * scsi_eh_done - Completion function for error handling. * @scmd: Cmd that is done. - **/ + */ static void scsi_eh_done(struct scsi_cmnd *scmd) { struct completion *eh_action; @@ -470,7 +469,7 @@ static void scsi_eh_done(struct scsi_cmnd *scmd) /** * scsi_try_host_reset - ask host adapter to reset itself * @scmd: SCSI cmd to send hsot reset. - **/ + */ static int scsi_try_host_reset(struct scsi_cmnd *scmd) { unsigned long flags; @@ -499,7 +498,7 @@ static int scsi_try_host_reset(struct scsi_cmnd *scmd) /** * scsi_try_bus_reset - ask host to perform a bus reset * @scmd: SCSI cmd to send bus reset. - **/ + */ static int scsi_try_bus_reset(struct scsi_cmnd *scmd) { unsigned long flags; @@ -534,7 +533,7 @@ static int scsi_try_bus_reset(struct scsi_cmnd *scmd) * unreliable for a given host, then the host itself needs to put a * timer on it, and set the host back to a consistent state prior to * returning. - **/ + */ static int scsi_try_bus_device_reset(struct scsi_cmnd *scmd) { int rtn; @@ -569,7 +568,7 @@ static int __scsi_try_to_abort_cmd(struct scsi_cmnd *scmd) * author of the low-level driver wishes this operation to be timed, * they can provide this facility themselves. helper functions in * scsi_error.c can be supplied to make this easier to do. - **/ + */ static int scsi_try_to_abort_cmd(struct scsi_cmnd *scmd) { /* @@ -602,7 +601,7 @@ static void scsi_abort_eh_cmnd(struct scsi_cmnd *scmd) * sent must be one that does not transfer any data. If @sense_bytes != 0 * @cmnd is ignored and this functions sets up a REQUEST_SENSE command * and cmnd buffers to read @sense_bytes into @scmd->sense_buffer. - **/ + */ void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd, struct scsi_eh_save *ses, unsigned char *cmnd, int cmnd_size, unsigned sense_bytes) { @@ -618,29 +617,27 @@ void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd, struct scsi_eh_save *ses, ses->cmd_len = scmd->cmd_len; memcpy(ses->cmnd, scmd->cmnd, sizeof(scmd->cmnd)); ses->data_direction = scmd->sc_data_direction; - ses->bufflen = scmd->request_bufflen; - ses->buffer = scmd->request_buffer; - ses->use_sg = scmd->use_sg; - ses->resid = scmd->resid; + ses->sdb = scmd->sdb; + ses->next_rq = scmd->request->next_rq; ses->result = scmd->result; + memset(&scmd->sdb, 0, sizeof(scmd->sdb)); + scmd->request->next_rq = NULL; + if (sense_bytes) { - scmd->request_bufflen = min_t(unsigned, - sizeof(scmd->sense_buffer), sense_bytes); + scmd->sdb.length = min_t(unsigned, SCSI_SENSE_BUFFERSIZE, + sense_bytes); sg_init_one(&ses->sense_sgl, scmd->sense_buffer, - scmd->request_bufflen); - scmd->request_buffer = &ses->sense_sgl; + scmd->sdb.length); + scmd->sdb.table.sgl = &ses->sense_sgl; scmd->sc_data_direction = DMA_FROM_DEVICE; - scmd->use_sg = 1; + scmd->sdb.table.nents = 1; memset(scmd->cmnd, 0, sizeof(scmd->cmnd)); scmd->cmnd[0] = REQUEST_SENSE; - scmd->cmnd[4] = scmd->request_bufflen; + scmd->cmnd[4] = scmd->sdb.length; scmd->cmd_len = COMMAND_SIZE(scmd->cmnd[0]); } else { - scmd->request_buffer = NULL; - scmd->request_bufflen = 0; scmd->sc_data_direction = DMA_NONE; - scmd->use_sg = 0; if (cmnd) { memset(scmd->cmnd, 0, sizeof(scmd->cmnd)); memcpy(scmd->cmnd, cmnd, cmnd_size); @@ -658,7 +655,7 @@ void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd, struct scsi_eh_save *ses, * Zero the sense buffer. The scsi spec mandates that any * untransferred sense data should be interpreted as being zero. */ - memset(scmd->sense_buffer, 0, sizeof(scmd->sense_buffer)); + memset(scmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); } EXPORT_SYMBOL(scsi_eh_prep_cmnd); @@ -668,7 +665,7 @@ EXPORT_SYMBOL(scsi_eh_prep_cmnd); * @ses: saved information from a coresponding call to scsi_prep_eh_cmnd * * Undo any damage done by above scsi_prep_eh_cmnd(). - **/ + */ void scsi_eh_restore_cmnd(struct scsi_cmnd* scmd, struct scsi_eh_save *ses) { /* @@ -677,10 +674,8 @@ void scsi_eh_restore_cmnd(struct scsi_cmnd* scmd, struct scsi_eh_save *ses) scmd->cmd_len = ses->cmd_len; memcpy(scmd->cmnd, ses->cmnd, sizeof(scmd->cmnd)); scmd->sc_data_direction = ses->data_direction; - scmd->request_bufflen = ses->bufflen; - scmd->request_buffer = ses->buffer; - scmd->use_sg = ses->use_sg; - scmd->resid = ses->resid; + scmd->sdb = ses->sdb; + scmd->request->next_rq = ses->next_rq; scmd->result = ses->result; } EXPORT_SYMBOL(scsi_eh_restore_cmnd); @@ -698,7 +693,7 @@ EXPORT_SYMBOL(scsi_eh_restore_cmnd); * * Return value: * SUCCESS or FAILED or NEEDS_RETRY - **/ + */ static int scsi_send_eh_cmnd(struct scsi_cmnd *scmd, unsigned char *cmnd, int cmnd_size, int timeout, unsigned sense_bytes) { @@ -766,7 +761,7 @@ static int scsi_send_eh_cmnd(struct scsi_cmnd *scmd, unsigned char *cmnd, * Some hosts automatically obtain this information, others require * that we obtain it on our own. This function will *not* return until * the command either times out, or it completes. - **/ + */ static int scsi_request_sense(struct scsi_cmnd *scmd) { return scsi_send_eh_cmnd(scmd, NULL, 0, SENSE_TIMEOUT, ~0); @@ -780,10 +775,10 @@ static int scsi_request_sense(struct scsi_cmnd *scmd) * Notes: * We don't want to use the normal command completion while we are are * still handling errors - it may cause other commands to be queued, - * and that would disturb what we are doing. thus we really want to + * and that would disturb what we are doing. Thus we really want to * keep a list of pending commands for final completion, and once we * are ready to leave error handling we handle completion for real. - **/ + */ void scsi_eh_finish_cmd(struct scsi_cmnd *scmd, struct list_head *done_q) { scmd->device->host->host_failed--; @@ -795,7 +790,7 @@ EXPORT_SYMBOL(scsi_eh_finish_cmd); /** * scsi_eh_get_sense - Get device sense data. * @work_q: Queue of commands to process. - * @done_q: Queue of proccessed commands.. + * @done_q: Queue of processed commands. * * Description: * See if we need to request sense information. if so, then get it @@ -803,7 +798,7 @@ EXPORT_SYMBOL(scsi_eh_finish_cmd); * * Notes: * This has the unfortunate side effect that if a shost adapter does - * not automatically request sense information, that we end up shutting + * not automatically request sense information, we end up shutting * it down before we request it. * * All drivers should request sense information internally these days, @@ -811,7 +806,7 @@ EXPORT_SYMBOL(scsi_eh_finish_cmd); * * XXX: Long term this code should go away, but that needs an audit of * all LLDDs first. - **/ + */ int scsi_eh_get_sense(struct list_head *work_q, struct list_head *done_q) { @@ -859,11 +854,11 @@ EXPORT_SYMBOL_GPL(scsi_eh_get_sense); /** * scsi_eh_tur - Send TUR to device. - * @scmd: Scsi cmd to send TUR + * @scmd: &scsi_cmnd to send TUR * * Return value: * 0 - Device is ready. 1 - Device NOT ready. - **/ + */ static int scsi_eh_tur(struct scsi_cmnd *scmd) { static unsigned char tur_command[6] = {TEST_UNIT_READY, 0, 0, 0, 0, 0}; @@ -888,17 +883,17 @@ retry_tur: } /** - * scsi_eh_abort_cmds - abort canceled commands. - * @shost: scsi host being recovered. - * @eh_done_q: list_head for processed commands. + * scsi_eh_abort_cmds - abort pending commands. + * @work_q: &list_head for pending commands. + * @done_q: &list_head for processed commands. * * Decription: * Try and see whether or not it makes sense to try and abort the - * running command. this only works out to be the case if we have one - * command that has timed out. if the command simply failed, it makes + * running command. This only works out to be the case if we have one + * command that has timed out. If the command simply failed, it makes * no sense to try and abort the command, since as far as the shost * adapter is concerned, it isn't running. - **/ + */ static int scsi_eh_abort_cmds(struct list_head *work_q, struct list_head *done_q) { @@ -932,11 +927,11 @@ static int scsi_eh_abort_cmds(struct list_head *work_q, /** * scsi_eh_try_stu - Send START_UNIT to device. - * @scmd: Scsi cmd to send START_UNIT + * @scmd: &scsi_cmnd to send START_UNIT * * Return value: * 0 - Device is ready. 1 - Device NOT ready. - **/ + */ static int scsi_eh_try_stu(struct scsi_cmnd *scmd) { static unsigned char stu_command[6] = {START_STOP, 0, 0, 0, 1, 0}; @@ -957,13 +952,14 @@ static int scsi_eh_try_stu(struct scsi_cmnd *scmd) /** * scsi_eh_stu - send START_UNIT if needed - * @shost: scsi host being recovered. - * @eh_done_q: list_head for processed commands. + * @shost: &scsi host being recovered. + * @work_q: &list_head for pending commands. + * @done_q: &list_head for processed commands. * * Notes: * If commands are failing due to not ready, initializing command required, * 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, struct list_head *done_q) @@ -1009,14 +1005,15 @@ static int scsi_eh_stu(struct Scsi_Host *shost, /** * scsi_eh_bus_device_reset - send bdr if needed * @shost: scsi host being recovered. - * @eh_done_q: list_head for processed commands. + * @work_q: &list_head for pending commands. + * @done_q: &list_head for processed commands. * * Notes: - * Try a bus device reset. still, look to see whether we have multiple + * 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. - **/ + */ static int scsi_eh_bus_device_reset(struct Scsi_Host *shost, struct list_head *work_q, struct list_head *done_q) @@ -1064,9 +1061,10 @@ static int scsi_eh_bus_device_reset(struct Scsi_Host *shost, /** * scsi_eh_bus_reset - send a bus reset - * @shost: scsi host being recovered. - * @eh_done_q: list_head for processed commands. - **/ + * @shost: &scsi host being recovered. + * @work_q: &list_head for pending commands. + * @done_q: &list_head for processed commands. + */ static int scsi_eh_bus_reset(struct Scsi_Host *shost, struct list_head *work_q, struct list_head *done_q) @@ -1123,7 +1121,7 @@ static int scsi_eh_bus_reset(struct Scsi_Host *shost, * scsi_eh_host_reset - send a host reset * @work_q: list_head for processed commands. * @done_q: list_head for processed commands. - **/ + */ static int scsi_eh_host_reset(struct list_head *work_q, struct list_head *done_q) { @@ -1158,8 +1156,7 @@ static int scsi_eh_host_reset(struct list_head *work_q, * scsi_eh_offline_sdevs - offline scsi devices that fail to recover * @work_q: list_head for processed commands. * @done_q: list_head for processed commands. - * - **/ + */ static void scsi_eh_offline_sdevs(struct list_head *work_q, struct list_head *done_q) { @@ -1192,7 +1189,7 @@ static void scsi_eh_offline_sdevs(struct list_head *work_q, * is woken. In cases where the error code indicates an error that * doesn't require the error handler read (i.e. we don't need to * abort/reset), this function should return SUCCESS. - **/ + */ int scsi_decide_disposition(struct scsi_cmnd *scmd) { int rtn; @@ -1373,7 +1370,7 @@ int scsi_decide_disposition(struct scsi_cmnd *scmd) * * If scsi_allocate_request() fails for what ever reason, we * completely forget to lock the door. - **/ + */ static void scsi_eh_lock_door(struct scsi_device *sdev) { unsigned char cmnd[MAX_COMMAND_SIZE]; @@ -1397,7 +1394,7 @@ static void scsi_eh_lock_door(struct scsi_device *sdev) * Notes: * When we entered the error handler, we blocked all further i/o to * this device. we need to 'reverse' this process. - **/ + */ static void scsi_restart_operations(struct Scsi_Host *shost) { struct scsi_device *sdev; @@ -1441,9 +1438,9 @@ static void scsi_restart_operations(struct Scsi_Host *shost) /** * scsi_eh_ready_devs - check device ready state and recover if not. * @shost: host to be recovered. - * @eh_done_q: list_head for processed commands. - * - **/ + * @work_q: &list_head for pending commands. + * @done_q: &list_head for processed commands. + */ void scsi_eh_ready_devs(struct Scsi_Host *shost, struct list_head *work_q, struct list_head *done_q) @@ -1459,8 +1456,7 @@ EXPORT_SYMBOL_GPL(scsi_eh_ready_devs); /** * scsi_eh_flush_done_q - finish processed commands or retry them. * @done_q: list_head of processed commands. - * - **/ + */ void scsi_eh_flush_done_q(struct list_head *done_q) { struct scsi_cmnd *scmd, *next; @@ -1514,7 +1510,7 @@ EXPORT_SYMBOL(scsi_eh_flush_done_q); * scsi_finish_cmd() called for it. we do all of the retry stuff * here, so when we restart the host after we return it should have an * empty queue. - **/ + */ static void scsi_unjam_host(struct Scsi_Host *shost) { unsigned long flags; @@ -1541,7 +1537,7 @@ static void scsi_unjam_host(struct Scsi_Host *shost) * Notes: * This is the main error handling loop. This is run as a kernel thread * for every SCSI host and handles all error handling activity. - **/ + */ int scsi_error_handler(void *data) { struct Scsi_Host *shost = data; @@ -1700,8 +1696,7 @@ scsi_reset_provider(struct scsi_device *dev, int flag) memset(&scmd->cmnd, '\0', sizeof(scmd->cmnd)); scmd->scsi_done = scsi_reset_provider_done_command; - scmd->request_buffer = NULL; - scmd->request_bufflen = 0; + memset(&scmd->sdb, 0, sizeof(scmd->sdb)); scmd->cmd_len = 0; @@ -1770,7 +1765,7 @@ EXPORT_SYMBOL(scsi_reset_provider); * * Return value: * 1 if valid sense data information found, else 0; - **/ + */ int scsi_normalize_sense(const u8 *sense_buffer, int sb_len, struct scsi_sense_hdr *sshdr) { @@ -1820,14 +1815,12 @@ int scsi_command_normalize_sense(struct scsi_cmnd *cmd, struct scsi_sense_hdr *sshdr) { return scsi_normalize_sense(cmd->sense_buffer, - sizeof(cmd->sense_buffer), sshdr); + SCSI_SENSE_BUFFERSIZE, sshdr); } EXPORT_SYMBOL(scsi_command_normalize_sense); /** - * scsi_sense_desc_find - search for a given descriptor type in - * descriptor sense data format. - * + * scsi_sense_desc_find - search for a given descriptor type in descriptor sense data format. * @sense_buffer: byte array of descriptor format sense data * @sb_len: number of valid bytes in sense_buffer * @desc_type: value of descriptor type to find @@ -1838,7 +1831,7 @@ EXPORT_SYMBOL(scsi_command_normalize_sense); * * Return value: * pointer to start of (first) descriptor if found else NULL - **/ + */ const u8 * scsi_sense_desc_find(const u8 * sense_buffer, int sb_len, int desc_type) { @@ -1866,9 +1859,7 @@ const u8 * scsi_sense_desc_find(const u8 * sense_buffer, int sb_len, EXPORT_SYMBOL(scsi_sense_desc_find); /** - * scsi_get_sense_info_fld - attempts to get information field from - * sense data (either fixed or descriptor format) - * + * scsi_get_sense_info_fld - get information field from sense data (either fixed or descriptor format) * @sense_buffer: byte array of sense data * @sb_len: number of valid bytes in sense_buffer * @info_out: pointer to 64 integer where 8 or 4 byte information @@ -1876,7 +1867,7 @@ EXPORT_SYMBOL(scsi_sense_desc_find); * * Return value: * 1 if information field found, 0 if not found. - **/ + */ int scsi_get_sense_info_fld(const u8 * sense_buffer, int sb_len, u64 * info_out) {