Commit c8c6c9ba authored by Linus Torvalds's avatar Linus Torvalds

Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull misc SCSI patches from James Bottomley:
 "This is a short patch set representing a couple of left overs from the
  merge window (debug removal and MAINTAINER changes).

  Plus one merge window regression (the local workqueue for hpsa) and a
  set of bug fixes for several issues (two for scsi-mq and the rest an
  assortment of long standing stuff, all cc'd to stable)"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  sg: fix EWOULDBLOCK errors with scsi-mq
  sg: fix unkillable I/O wait deadlock with scsi-mq
  sg: fix read() error reporting
  wd719x: add missing .module to wd719x_template
  hpsa: correct compiler warnings introduced by hpsa-add-local-workqueue patch
  fixed invalid assignment of 64bit mask to host dma_boundary for scatter gather segment boundary limit.
  fcoe: Transition maintainership to Vasu
  am53c974: remove left-over debugging code
parents 93aaa830 7772855a
......@@ -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
......
......@@ -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
......
......@@ -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;
......
......@@ -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);
......
......@@ -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);
......
......@@ -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,
......
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