scsi: pm8001: Fix tag values handling
[ Upstream commit 7fb23a785b
]
The function pm8001_tag_alloc() determines free tags using the function
find_first_zero_bit() which can return 0 when the first bit of the bitmap
being inspected is 0. As such, tag 0 is a valid tag value that should not
be dismissed as invalid. Fix the functions pm8001_work_fn(),
mpi_sata_completion(), pm8001_mpi_task_abort_resp() and
pm8001_open_reject_retry() to not dismiss 0 tags as invalid.
The value 0xffffffff is used for invalid tags for unused ccb information
structures. Add the macro definition PM8001_INVALID_TAG to define this
value.
Link: https://lore.kernel.org/r/20220220031810.738362-20-damien.lemoal@opensource.wdc.com
Reviewed-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
parent
377da5df07
commit
73b37c122d
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@ -1522,7 +1522,6 @@ void pm8001_work_fn(struct work_struct *work)
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case IO_XFER_ERROR_BREAK:
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{ /* This one stashes the sas_task instead */
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struct sas_task *t = (struct sas_task *)pm8001_dev;
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u32 tag;
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struct pm8001_ccb_info *ccb;
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struct pm8001_hba_info *pm8001_ha = pw->pm8001_ha;
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unsigned long flags, flags1;
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@ -1544,8 +1543,8 @@ void pm8001_work_fn(struct work_struct *work)
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/* Search for a possible ccb that matches the task */
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for (i = 0; ccb = NULL, i < PM8001_MAX_CCB; i++) {
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ccb = &pm8001_ha->ccb_info[i];
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tag = ccb->ccb_tag;
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if ((tag != 0xFFFFFFFF) && (ccb->task == t))
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if ((ccb->ccb_tag != PM8001_INVALID_TAG) &&
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(ccb->task == t))
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break;
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}
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if (!ccb) {
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@ -1567,11 +1566,11 @@ void pm8001_work_fn(struct work_struct *work)
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spin_unlock_irqrestore(&t->task_state_lock, flags1);
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pm8001_dbg(pm8001_ha, FAIL, "task 0x%p done with event 0x%x resp 0x%x stat 0x%x but aborted by upper layer!\n",
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t, pw->handler, ts->resp, ts->stat);
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pm8001_ccb_task_free(pm8001_ha, t, ccb, tag);
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pm8001_ccb_task_free(pm8001_ha, t, ccb, ccb->ccb_tag);
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spin_unlock_irqrestore(&pm8001_ha->lock, flags);
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} else {
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spin_unlock_irqrestore(&t->task_state_lock, flags1);
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pm8001_ccb_task_free(pm8001_ha, t, ccb, tag);
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pm8001_ccb_task_free(pm8001_ha, t, ccb, ccb->ccb_tag);
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mb();/* in order to force CPU ordering */
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spin_unlock_irqrestore(&pm8001_ha->lock, flags);
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t->task_done(t);
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@ -1580,7 +1579,6 @@ void pm8001_work_fn(struct work_struct *work)
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case IO_XFER_OPEN_RETRY_TIMEOUT:
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{ /* This one stashes the sas_task instead */
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struct sas_task *t = (struct sas_task *)pm8001_dev;
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u32 tag;
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struct pm8001_ccb_info *ccb;
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struct pm8001_hba_info *pm8001_ha = pw->pm8001_ha;
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unsigned long flags, flags1;
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@ -1614,8 +1612,8 @@ void pm8001_work_fn(struct work_struct *work)
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/* Search for a possible ccb that matches the task */
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for (i = 0; ccb = NULL, i < PM8001_MAX_CCB; i++) {
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ccb = &pm8001_ha->ccb_info[i];
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tag = ccb->ccb_tag;
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if ((tag != 0xFFFFFFFF) && (ccb->task == t))
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if ((ccb->ccb_tag != PM8001_INVALID_TAG) &&
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(ccb->task == t))
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break;
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}
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if (!ccb) {
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@ -1686,19 +1684,13 @@ void pm8001_work_fn(struct work_struct *work)
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struct task_status_struct *ts;
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struct sas_task *task;
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int i;
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u32 tag, device_id;
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u32 device_id;
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for (i = 0; ccb = NULL, i < PM8001_MAX_CCB; i++) {
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ccb = &pm8001_ha->ccb_info[i];
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task = ccb->task;
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ts = &task->task_status;
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tag = ccb->ccb_tag;
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/* check if tag is NULL */
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if (!tag) {
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pm8001_dbg(pm8001_ha, FAIL,
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"tag Null\n");
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continue;
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}
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if (task != NULL) {
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dev = task->dev;
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if (!dev) {
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@ -1707,10 +1699,11 @@ void pm8001_work_fn(struct work_struct *work)
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continue;
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}
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/*complete sas task and update to top layer */
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pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
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pm8001_ccb_task_free(pm8001_ha, task, ccb,
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ccb->ccb_tag);
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ts->resp = SAS_TASK_COMPLETE;
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task->task_done(task);
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} else if (tag != 0xFFFFFFFF) {
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} else if (ccb->ccb_tag != PM8001_INVALID_TAG) {
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/* complete the internal commands/non-sas task */
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pm8001_dev = ccb->device;
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if (pm8001_dev->dcompletion) {
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@ -1718,7 +1711,7 @@ void pm8001_work_fn(struct work_struct *work)
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pm8001_dev->dcompletion = NULL;
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}
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complete(pm8001_ha->nvmd_completion);
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pm8001_tag_free(pm8001_ha, tag);
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pm8001_tag_free(pm8001_ha, ccb->ccb_tag);
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}
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}
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/* Deregister all the device ids */
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@ -2316,11 +2309,6 @@ mpi_sata_completion(struct pm8001_hba_info *pm8001_ha, void *piomb)
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param = le32_to_cpu(psataPayload->param);
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tag = le32_to_cpu(psataPayload->tag);
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if (!tag) {
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pm8001_dbg(pm8001_ha, FAIL, "tag null\n");
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return;
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}
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ccb = &pm8001_ha->ccb_info[tag];
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t = ccb->task;
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pm8001_dev = ccb->device;
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@ -3056,7 +3044,7 @@ void pm8001_mpi_set_dev_state_resp(struct pm8001_hba_info *pm8001_ha,
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device_id, pds, nds, status);
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complete(pm8001_dev->setds_completion);
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ccb->task = NULL;
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ccb->ccb_tag = 0xFFFFFFFF;
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ccb->ccb_tag = PM8001_INVALID_TAG;
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pm8001_tag_free(pm8001_ha, tag);
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}
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@ -3074,7 +3062,7 @@ void pm8001_mpi_set_nvmd_resp(struct pm8001_hba_info *pm8001_ha, void *piomb)
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dlen_status);
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}
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ccb->task = NULL;
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ccb->ccb_tag = 0xFFFFFFFF;
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ccb->ccb_tag = PM8001_INVALID_TAG;
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pm8001_tag_free(pm8001_ha, tag);
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}
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@ -3101,7 +3089,7 @@ pm8001_mpi_get_nvmd_resp(struct pm8001_hba_info *pm8001_ha, void *piomb)
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* freed by requesting path anywhere.
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*/
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ccb->task = NULL;
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ccb->ccb_tag = 0xFFFFFFFF;
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ccb->ccb_tag = PM8001_INVALID_TAG;
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pm8001_tag_free(pm8001_ha, tag);
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return;
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}
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@ -3147,7 +3135,7 @@ pm8001_mpi_get_nvmd_resp(struct pm8001_hba_info *pm8001_ha, void *piomb)
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complete(pm8001_ha->nvmd_completion);
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pm8001_dbg(pm8001_ha, MSG, "Get nvmd data complete!\n");
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ccb->task = NULL;
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ccb->ccb_tag = 0xFFFFFFFF;
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ccb->ccb_tag = PM8001_INVALID_TAG;
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pm8001_tag_free(pm8001_ha, tag);
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}
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@ -3560,7 +3548,7 @@ int pm8001_mpi_reg_resp(struct pm8001_hba_info *pm8001_ha, void *piomb)
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}
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complete(pm8001_dev->dcompletion);
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ccb->task = NULL;
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ccb->ccb_tag = 0xFFFFFFFF;
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ccb->ccb_tag = PM8001_INVALID_TAG;
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pm8001_tag_free(pm8001_ha, htag);
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return 0;
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}
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@ -3632,7 +3620,7 @@ int pm8001_mpi_fw_flash_update_resp(struct pm8001_hba_info *pm8001_ha,
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}
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kfree(ccb->fw_control_context);
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ccb->task = NULL;
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ccb->ccb_tag = 0xFFFFFFFF;
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ccb->ccb_tag = PM8001_INVALID_TAG;
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pm8001_tag_free(pm8001_ha, tag);
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complete(pm8001_ha->nvmd_completion);
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return 0;
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@ -3668,10 +3656,6 @@ int pm8001_mpi_task_abort_resp(struct pm8001_hba_info *pm8001_ha, void *piomb)
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status = le32_to_cpu(pPayload->status);
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tag = le32_to_cpu(pPayload->tag);
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if (!tag) {
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pm8001_dbg(pm8001_ha, FAIL, " TAG NULL. RETURNING !!!\n");
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return -1;
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}
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scp = le32_to_cpu(pPayload->scp);
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ccb = &pm8001_ha->ccb_info[tag];
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@ -1216,10 +1216,11 @@ pm8001_init_ccb_tag(struct pm8001_hba_info *pm8001_ha, struct Scsi_Host *shost,
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goto err_out;
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}
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pm8001_ha->ccb_info[i].task = NULL;
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pm8001_ha->ccb_info[i].ccb_tag = 0xffffffff;
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pm8001_ha->ccb_info[i].ccb_tag = PM8001_INVALID_TAG;
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pm8001_ha->ccb_info[i].device = NULL;
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++pm8001_ha->tags_num;
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}
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return 0;
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err_out_noccb:
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@ -567,7 +567,7 @@ void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
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task->lldd_task = NULL;
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ccb->task = NULL;
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ccb->ccb_tag = 0xFFFFFFFF;
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ccb->ccb_tag = PM8001_INVALID_TAG;
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ccb->open_retry = 0;
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pm8001_tag_free(pm8001_ha, ccb_idx);
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}
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@ -952,9 +952,11 @@ void pm8001_open_reject_retry(
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struct task_status_struct *ts;
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struct pm8001_device *pm8001_dev;
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unsigned long flags1;
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u32 tag;
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struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
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if (ccb->ccb_tag == PM8001_INVALID_TAG)
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continue;
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pm8001_dev = ccb->device;
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if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
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continue;
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@ -966,9 +968,6 @@ void pm8001_open_reject_retry(
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continue;
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} else if (pm8001_dev != device_to_close)
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continue;
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tag = ccb->ccb_tag;
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if (!tag || (tag == 0xFFFFFFFF))
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continue;
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task = ccb->task;
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if (!task || !task->task_done)
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continue;
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& SAS_TASK_STATE_ABORTED))) {
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spin_unlock_irqrestore(&task->task_state_lock,
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flags1);
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pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
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pm8001_ccb_task_free(pm8001_ha, task, ccb, ccb->ccb_tag);
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} else {
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spin_unlock_irqrestore(&task->task_state_lock,
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flags1);
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pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
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pm8001_ccb_task_free(pm8001_ha, task, ccb, ccb->ccb_tag);
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mb();/* in order to force CPU ordering */
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spin_unlock_irqrestore(&pm8001_ha->lock, flags);
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task->task_done(task);
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@ -738,6 +738,8 @@ void pm8001_free_dev(struct pm8001_device *pm8001_dev);
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/* ctl shared API */
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extern const struct attribute_group *pm8001_host_groups[];
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#define PM8001_INVALID_TAG ((u32)-1)
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static inline void
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pm8001_ccb_task_free_done(struct pm8001_hba_info *pm8001_ha,
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struct sas_task *task, struct pm8001_ccb_info *ccb,
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@ -2404,11 +2404,6 @@ mpi_sata_completion(struct pm8001_hba_info *pm8001_ha,
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param = le32_to_cpu(psataPayload->param);
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tag = le32_to_cpu(psataPayload->tag);
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if (!tag) {
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pm8001_dbg(pm8001_ha, FAIL, "tag null\n");
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return;
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}
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ccb = &pm8001_ha->ccb_info[tag];
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t = ccb->task;
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pm8001_dev = ccb->device;
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