From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hannes Reinecke Subject: [PATCH 06/35] visorhba: sanitze private device data allocation Date: Fri, 23 Jun 2017 15:02:26 +0200 Message-ID: <1498222975-71858-7-git-send-email-hare@suse.de> References: <1498222975-71858-1-git-send-email-hare@suse.de> Return-path: Received: from mx2.suse.de ([195.135.220.15]:32837 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752075AbdFWND0 (ORCPT ); Fri, 23 Jun 2017 09:03:26 -0400 In-Reply-To: <1498222975-71858-1-git-send-email-hare@suse.de> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: "Martin K. Petersen" Cc: Christoph Hellwig , James Bottomley , linux-scsi@vger.kernel.org, Hannes Reinecke , Hannes Reinecke There's no need to keep the private data for a device in a separate list; better to store it in ->hostdata and do away with the additional list. Signed-off-by: Hannes Reinecke --- drivers/staging/unisys/visorhba/visorhba_main.c | 123 ++++++++++-------------- 1 file changed, 53 insertions(+), 70 deletions(-) diff --git a/drivers/staging/unisys/visorhba/visorhba_main.c b/drivers/staging/unisys/visorhba/visorhba_main.c index 6997b16..811abfc 100644 --- a/drivers/staging/unisys/visorhba/visorhba_main.c +++ b/drivers/staging/unisys/visorhba/visorhba_main.c @@ -47,8 +47,8 @@ MODULE_ALIAS("visorbus:" SPAR_VHBA_CHANNEL_PROTOCOL_UUID_STR); struct visordisk_info { + struct scsi_device *sdev; u32 valid; - u32 channel, id, lun; /* Disk Path */ atomic_t ios_threshold; atomic_t error_count; struct visordisk_info *next; @@ -101,12 +101,6 @@ struct visorhba_devices_open { struct visorhba_devdata *devdata; }; -#define for_each_vdisk_match(iter, list, match) \ - for (iter = &list->head; iter->next; iter = iter->next) \ - if ((iter->channel == match->channel) && \ - (iter->id == match->id) && \ - (iter->lun == match->lun)) - /* * visor_thread_start - starts a thread for the device * @threadfn: Function the thread starts @@ -296,10 +290,9 @@ static void cleanup_scsitaskmgmt_handles(struct idr *idrtable, * Returns whether the command was queued successfully or not. */ static int forward_taskmgmt_command(enum task_mgmt_types tasktype, - struct scsi_cmnd *scsicmd) + struct scsi_device *scsidev) { struct uiscmdrsp *cmdrsp; - struct scsi_device *scsidev = scsicmd->device; struct visorhba_devdata *devdata = (struct visorhba_devdata *)scsidev->host->hostdata; int notifyresult = 0xffff; @@ -347,12 +340,6 @@ static int forward_taskmgmt_command(enum task_mgmt_types tasktype, dev_dbg(&scsidev->sdev_gendev, "visorhba: taskmgmt type=%d success; result=0x%x\n", tasktype, notifyresult); - if (tasktype == TASK_MGMT_ABORT_TASK) - scsicmd->result = DID_ABORT << 16; - else - scsicmd->result = DID_RESET << 16; - - scsicmd->scsi_done(scsicmd); cleanup_scsitaskmgmt_handles(&devdata->idr, cmdrsp); return SUCCESS; @@ -376,17 +363,20 @@ static int visorhba_abort_handler(struct scsi_cmnd *scsicmd) /* issue TASK_MGMT_ABORT_TASK */ struct scsi_device *scsidev; struct visordisk_info *vdisk; - struct visorhba_devdata *devdata; + int rtn; scsidev = scsicmd->device; - devdata = (struct visorhba_devdata *)scsidev->host->hostdata; - for_each_vdisk_match(vdisk, devdata, scsidev) { - if (atomic_read(&vdisk->error_count) < VISORHBA_ERROR_COUNT) - atomic_inc(&vdisk->error_count); - else - atomic_set(&vdisk->ios_threshold, IOS_ERROR_THRESHOLD); + vdisk = scsidev->hostdata; + if (atomic_read(&vdisk->error_count) < VISORHBA_ERROR_COUNT) + atomic_inc(&vdisk->error_count); + else + atomic_set(&vdisk->ios_threshold, IOS_ERROR_THRESHOLD); + rtn = forward_taskmgmt_command(TASK_MGMT_ABORT_TASK, scsidev); + if (rtn == SUCCESS) { + scsicmd->result = DID_ABORT << 16; + scsicmd->scsi_done(scsicmd); } - return forward_taskmgmt_command(TASK_MGMT_ABORT_TASK, scsicmd); + return rtn; } /* @@ -400,17 +390,20 @@ static int visorhba_device_reset_handler(struct scsi_cmnd *scsicmd) /* issue TASK_MGMT_LUN_RESET */ struct scsi_device *scsidev; struct visordisk_info *vdisk; - struct visorhba_devdata *devdata; + int rtn; scsidev = scsicmd->device; - devdata = (struct visorhba_devdata *)scsidev->host->hostdata; - for_each_vdisk_match(vdisk, devdata, scsidev) { - if (atomic_read(&vdisk->error_count) < VISORHBA_ERROR_COUNT) - atomic_inc(&vdisk->error_count); - else - atomic_set(&vdisk->ios_threshold, IOS_ERROR_THRESHOLD); + vdisk = scsidev->hostdata; + if (atomic_read(&vdisk->error_count) < VISORHBA_ERROR_COUNT) + atomic_inc(&vdisk->error_count); + else + atomic_set(&vdisk->ios_threshold, IOS_ERROR_THRESHOLD); + rtn = forward_taskmgmt_command(TASK_MGMT_LUN_RESET, scsidev); + if (rtn == SUCCESS) { + scsicmd->result = DID_RESET << 16; + scsicmd->scsi_done(scsicmd); } - return forward_taskmgmt_command(TASK_MGMT_LUN_RESET, scsicmd); + return rtn; } /* @@ -424,17 +417,22 @@ static int visorhba_bus_reset_handler(struct scsi_cmnd *scsicmd) { struct scsi_device *scsidev; struct visordisk_info *vdisk; - struct visorhba_devdata *devdata; + int rtn; scsidev = scsicmd->device; - devdata = (struct visorhba_devdata *)scsidev->host->hostdata; - for_each_vdisk_match(vdisk, devdata, scsidev) { + shost_for_each_device(scsidev, scsidev->host) { + vdisk = scsidev->hostdata; if (atomic_read(&vdisk->error_count) < VISORHBA_ERROR_COUNT) atomic_inc(&vdisk->error_count); else atomic_set(&vdisk->ios_threshold, IOS_ERROR_THRESHOLD); } - return forward_taskmgmt_command(TASK_MGMT_BUS_RESET, scsicmd); + rtn = forward_taskmgmt_command(TASK_MGMT_BUS_RESET, scsidev); + if (rtn == SUCCESS) { + scsicmd->result = DID_RESET << 16; + scsicmd->scsi_done(scsicmd); + } + return rtn; } /* @@ -569,25 +567,22 @@ static int visorhba_slave_alloc(struct scsi_device *scsidev) * LLD can alloc any struct & do init if needed. */ struct visordisk_info *vdisk; - struct visordisk_info *tmpvdisk; struct visorhba_devdata *devdata; struct Scsi_Host *scsihost = (struct Scsi_Host *)scsidev->host; + if (scsidev->hostdata) + return 0; /* already allocated return success */ + devdata = (struct visorhba_devdata *)scsihost->hostdata; if (!devdata) return 0; /* even though we errored, treat as success */ - for_each_vdisk_match(vdisk, devdata, scsidev) - return 0; /* already allocated return success */ - - tmpvdisk = kzalloc(sizeof(*tmpvdisk), GFP_ATOMIC); - if (!tmpvdisk) + vdisk = kzalloc(sizeof(*vdisk), GFP_ATOMIC); + if (!vdisk) return -ENOMEM; - tmpvdisk->channel = scsidev->channel; - tmpvdisk->id = scsidev->id; - tmpvdisk->lun = scsidev->lun; - vdisk->next = tmpvdisk; + vdisk->sdev = scsidev; + scsidev->hostdata = vdisk; return 0; } @@ -603,17 +598,11 @@ static void visorhba_slave_destroy(struct scsi_device *scsidev) /* midlevel calls this after device has been quiesced and * before it is to be deleted. */ - struct visordisk_info *vdisk, *delvdisk; - struct visorhba_devdata *devdata; - struct Scsi_Host *scsihost = (struct Scsi_Host *)scsidev->host; + struct visordisk_info *vdisk; - devdata = (struct visorhba_devdata *)scsihost->hostdata; - for_each_vdisk_match(vdisk, devdata, scsidev) { - delvdisk = vdisk->next; - vdisk->next = delvdisk->next; - kfree(delvdisk); - return; - } + vdisk = scsidev->hostdata; + scsidev->hostdata = NULL; + kfree(vdisk); } static struct scsi_host_template visorhba_driver_template = { @@ -787,7 +776,6 @@ static int visorhba_serverdown(struct visorhba_devdata *devdata) static void do_scsi_linuxstat(struct uiscmdrsp *cmdrsp, struct scsi_cmnd *scsicmd) { - struct visorhba_devdata *devdata; struct visordisk_info *vdisk; struct scsi_device *scsidev; @@ -800,12 +788,10 @@ static int visorhba_serverdown(struct visorhba_devdata *devdata) (cmdrsp->scsi.addlstat == ADDL_SEL_TIMEOUT)) return; /* Okay see what our error_count is here.... */ - devdata = (struct visorhba_devdata *)scsidev->host->hostdata; - for_each_vdisk_match(vdisk, devdata, scsidev) { - if (atomic_read(&vdisk->error_count) < VISORHBA_ERROR_COUNT) { - atomic_inc(&vdisk->error_count); - atomic_set(&vdisk->ios_threshold, IOS_ERROR_THRESHOLD); - } + vdisk = scsidev->hostdata; + if (atomic_read(&vdisk->error_count) < VISORHBA_ERROR_COUNT) { + atomic_inc(&vdisk->error_count); + atomic_set(&vdisk->ios_threshold, IOS_ERROR_THRESHOLD); } } @@ -846,7 +832,6 @@ static int set_no_disk_inquiry_result(unsigned char *buf, char *this_page_orig; int bufind = 0; struct visordisk_info *vdisk; - struct visorhba_devdata *devdata; scsidev = scsicmd->device; if ((cmdrsp->scsi.cmnd[0] == INQUIRY) && @@ -883,13 +868,11 @@ static int set_no_disk_inquiry_result(unsigned char *buf, } kfree(buf); } else { - devdata = (struct visorhba_devdata *)scsidev->host->hostdata; - for_each_vdisk_match(vdisk, devdata, scsidev) { - if (atomic_read(&vdisk->ios_threshold) > 0) { - atomic_dec(&vdisk->ios_threshold); - if (atomic_read(&vdisk->ios_threshold) == 0) - atomic_set(&vdisk->error_count, 0); - } + vdisk = scsidev->hostdata; + if (atomic_read(&vdisk->ios_threshold) > 0) { + atomic_dec(&vdisk->ios_threshold); + if (atomic_read(&vdisk->ios_threshold) == 0) + atomic_set(&vdisk->error_count, 0); } } } -- 1.8.5.6