diff options
| -rw-r--r-- | MAINTAINERS | 2 | ||||
| -rw-r--r-- | drivers/scsi/am53c974.c | 6 | ||||
| -rw-r--r-- | drivers/scsi/be2iscsi/be_main.c | 1 | ||||
| -rw-r--r-- | drivers/scsi/hpsa.c | 4 | ||||
| -rw-r--r-- | drivers/scsi/sg.c | 40 | ||||
| -rw-r--r-- | drivers/scsi/wd719x.c | 1 |
6 files changed, 36 insertions, 18 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 63d83bd6931f..ddc5a8cf9a8a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3937,7 +3937,7 @@ S: Maintained F: drivers/staging/fbtft/ FCOE SUBSYSTEM (libfc, libfcoe, fcoe) -M: Robert Love <robert.w.love@intel.com> +M: Vasu Dev <vasu.dev@intel.com> L: fcoe-devel@open-fcoe.org W: www.Open-FCoE.org S: Supported diff --git a/drivers/scsi/am53c974.c b/drivers/scsi/am53c974.c index aa3e2c7cd83c..a6f5ee80fadc 100644 --- a/drivers/scsi/am53c974.c +++ b/drivers/scsi/am53c974.c @@ -178,12 +178,6 @@ static void pci_esp_dma_drain(struct esp *esp) break; cpu_relax(); } - if (resid > 1) { - /* FIFO not cleared */ - shost_printk(KERN_INFO, esp->host, - "FIFO not cleared, %d bytes left\n", - resid); - } /* * When there is a residual BCMPLT will never be set diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c index 96241b20fd2c..a7cc61837818 100644 --- a/drivers/scsi/be2iscsi/be_main.c +++ b/drivers/scsi/be2iscsi/be_main.c @@ -585,7 +585,6 @@ static struct beiscsi_hba *beiscsi_hba_alloc(struct pci_dev *pcidev) "beiscsi_hba_alloc - iscsi_host_alloc failed\n"); return NULL; } - shost->dma_boundary = pcidev->dma_mask; shost->max_id = BE2_MAX_SESSIONS; shost->max_channel = 0; shost->max_cmd_len = BEISCSI_MAX_CMD_LEN; diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index 95d581c45413..a1cfbd3dda47 100644 --- a/drivers/scsi/hpsa.c +++ b/drivers/scsi/hpsa.c @@ -6831,10 +6831,8 @@ static struct workqueue_struct *hpsa_create_controller_wq(struct ctlr_info *h, char *name) { struct workqueue_struct *wq = NULL; - char wq_name[20]; - snprintf(wq_name, sizeof(wq_name), "%s_%d_hpsa", name, h->ctlr); - wq = alloc_ordered_workqueue(wq_name, 0); + wq = alloc_ordered_workqueue("%s_%d_hpsa", 0, name, h->ctlr); if (!wq) dev_err(&h->pdev->dev, "failed to create %s workqueue\n", name); diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c index 0cbc1fb45f10..2270bd51f9c2 100644 --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -546,7 +546,7 @@ static ssize_t sg_new_read(Sg_fd * sfp, char __user *buf, size_t count, Sg_request * srp) { sg_io_hdr_t *hp = &srp->header; - int err = 0; + int err = 0, err2; int len; if (count < SZ_SG_IO_HDR) { @@ -575,8 +575,8 @@ sg_new_read(Sg_fd * sfp, char __user *buf, size_t count, Sg_request * srp) goto err_out; } err_out: - err = sg_finish_rem_req(srp); - return (0 == err) ? count : err; + err2 = sg_finish_rem_req(srp); + return err ? : err2 ? : count; } static ssize_t @@ -1335,6 +1335,17 @@ sg_rq_end_io(struct request *rq, int uptodate) } /* Rely on write phase to clean out srp status values, so no "else" */ + /* + * Free the request as soon as it is complete so that its resources + * can be reused without waiting for userspace to read() the + * result. But keep the associated bio (if any) around until + * blk_rq_unmap_user() can be called from user context. + */ + srp->rq = NULL; + if (rq->cmd != rq->__cmd) + kfree(rq->cmd); + __blk_put_request(rq->q, rq); + write_lock_irqsave(&sfp->rq_list_lock, iflags); if (unlikely(srp->orphan)) { if (sfp->keep_orphan) @@ -1669,7 +1680,22 @@ sg_start_req(Sg_request *srp, unsigned char *cmd) return -ENOMEM; } - rq = blk_get_request(q, rw, GFP_ATOMIC); + /* + * NOTE + * + * With scsi-mq enabled, there are a fixed number of preallocated + * requests equal in number to shost->can_queue. If all of the + * preallocated requests are already in use, then using GFP_ATOMIC with + * blk_get_request() will return -EWOULDBLOCK, whereas using GFP_KERNEL + * will cause blk_get_request() to sleep until an active command + * completes, freeing up a request. Neither option is ideal, but + * GFP_KERNEL is the better choice to prevent userspace from getting an + * unexpected EWOULDBLOCK. + * + * With scsi-mq disabled, blk_get_request() with GFP_KERNEL usually + * does not sleep except under memory pressure. + */ + rq = blk_get_request(q, rw, GFP_KERNEL); if (IS_ERR(rq)) { kfree(long_cmdp); return PTR_ERR(rq); @@ -1759,10 +1785,10 @@ sg_finish_rem_req(Sg_request *srp) SCSI_LOG_TIMEOUT(4, sg_printk(KERN_INFO, sfp->parentdp, "sg_finish_rem_req: res_used=%d\n", (int) srp->res_used)); - if (srp->rq) { - if (srp->bio) - ret = blk_rq_unmap_user(srp->bio); + if (srp->bio) + ret = blk_rq_unmap_user(srp->bio); + if (srp->rq) { if (srp->rq->cmd != srp->rq->__cmd) kfree(srp->rq->cmd); blk_put_request(srp->rq); diff --git a/drivers/scsi/wd719x.c b/drivers/scsi/wd719x.c index 7702664d7ed3..289ad016d925 100644 --- a/drivers/scsi/wd719x.c +++ b/drivers/scsi/wd719x.c @@ -870,6 +870,7 @@ fail_free_params: } static struct scsi_host_template wd719x_template = { + .module = THIS_MODULE, .name = "Western Digital 719x", .queuecommand = wd719x_queuecommand, .eh_abort_handler = wd719x_abort, |