Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=0b05a1f0d68bf4714c37aa7843c31df1866b017a
Commit:     0b05a1f0d68bf4714c37aa7843c31df1866b017a
Parent:     a4722cf24d7a0dfa0874d49f61b053a6459761bf
Author:     Marcus Barrow <[EMAIL PROTECTED]>
AuthorDate: Thu Jan 17 09:02:13 2008 -0800
Committer:  James Bottomley <[EMAIL PROTECTED]>
CommitDate: Wed Jan 23 11:29:31 2008 -0600

    [SCSI] qla2xxx: Use completion routines.
    
    Instead of abusing the semaphore interfaces for mailbox command
    completions.
    
    Additional cleanups and
    Signed-off-by: Andrew Vasquez <[EMAIL PROTECTED]>
    Signed-off-by: James Bottomley <[EMAIL PROTECTED]>
---
 drivers/scsi/qla2xxx/qla_def.h |    4 +-
 drivers/scsi/qla2xxx/qla_gbl.h |    2 -
 drivers/scsi/qla2xxx/qla_isr.c |    8 +++---
 drivers/scsi/qla2xxx/qla_mbx.c |   44 +++------------------------------------
 drivers/scsi/qla2xxx/qla_mid.c |    5 ++-
 drivers/scsi/qla2xxx/qla_os.c  |   22 ++-----------------
 6 files changed, 16 insertions(+), 69 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index d0b78af..144f6d0 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -2413,9 +2413,9 @@ typedef struct scsi_qla_host {
 #define MBX_INTR_WAIT  2
 #define MBX_UPDATE_FLASH_ACTIVE        3
 
-       struct semaphore mbx_cmd_sem;   /* Serialialize mbx access */
        struct semaphore vport_sem;     /* Virtual port synchronization */
-       struct semaphore mbx_intr_sem;  /* Used for completion notification */
+       struct completion mbx_cmd_comp; /* Serialize mbx access */
+       struct completion mbx_intr_comp;  /* Used for completion notification */
 
        uint32_t        mbx_flags;
 #define  MBX_IN_PROGRESS       BIT_0
diff --git a/drivers/scsi/qla2xxx/qla_gbl.h b/drivers/scsi/qla2xxx/qla_gbl.h
index f6917b9..fa4455f 100644
--- a/drivers/scsi/qla2xxx/qla_gbl.h
+++ b/drivers/scsi/qla2xxx/qla_gbl.h
@@ -105,8 +105,6 @@ extern char *qla2x00_get_fw_version_str(struct 
scsi_qla_host *, char *);
 extern void qla2x00_mark_device_lost(scsi_qla_host_t *, fc_port_t *, int, int);
 extern void qla2x00_mark_all_devices_lost(scsi_qla_host_t *, int);
 
-extern int qla2x00_down_timeout(struct semaphore *, unsigned long);
-
 extern struct fw_blob *qla2x00_request_firmware(scsi_qla_host_t *);
 
 extern int qla2x00_wait_for_hba_online(scsi_qla_host_t *);
diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index 22216fe..642a0c3 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -104,7 +104,7 @@ qla2100_intr_handler(int irq, void *dev_id)
        if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
            (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
                set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
-               up(&ha->mbx_intr_sem);
+               complete(&ha->mbx_intr_comp);
        }
 
        return (IRQ_HANDLED);
@@ -216,7 +216,7 @@ qla2300_intr_handler(int irq, void *dev_id)
        if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
            (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
                set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
-               up(&ha->mbx_intr_sem);
+               complete(&ha->mbx_intr_comp);
        }
 
        return (IRQ_HANDLED);
@@ -1597,7 +1597,7 @@ qla24xx_intr_handler(int irq, void *dev_id)
        if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
            (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
                set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
-               up(&ha->mbx_intr_sem);
+               complete(&ha->mbx_intr_comp);
        }
 
        return IRQ_HANDLED;
@@ -1734,7 +1734,7 @@ qla24xx_msix_default(int irq, void *dev_id)
        if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
            (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
                set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
-               up(&ha->mbx_intr_sem);
+               complete(&ha->mbx_intr_comp);
        }
 
        return IRQ_HANDLED;
diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index 0fc1652..d23d6fc 100644
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -8,19 +8,6 @@
 
 #include <linux/delay.h>
 
-static void
-qla2x00_mbx_sem_timeout(unsigned long data)
-{
-       struct semaphore        *sem_ptr = (struct semaphore *)data;
-
-       DEBUG11(printk("qla2x00_sem_timeout: entered.\n"));
-
-       if (sem_ptr != NULL) {
-               up(sem_ptr);
-       }
-
-       DEBUG11(printk("qla2x00_mbx_sem_timeout: exiting.\n"));
-}
 
 /*
  * qla2x00_mailbox_command
@@ -47,7 +34,6 @@ qla2x00_mailbox_command(scsi_qla_host_t *pvha, mbx_cmd_t *mcp)
        int             rval;
        unsigned long    flags = 0;
        device_reg_t __iomem *reg;
-       struct timer_list       tmp_intr_timer;
        uint8_t         abort_active;
        uint8_t         io_lock_on;
        uint16_t        command;
@@ -72,7 +58,8 @@ qla2x00_mailbox_command(scsi_qla_host_t *pvha, mbx_cmd_t *mcp)
         * non ISP abort time.
         */
        if (!abort_active) {
-               if (qla2x00_down_timeout(&ha->mbx_cmd_sem, mcp->tov * HZ)) {
+               if (!wait_for_completion_timeout(&ha->mbx_cmd_comp,
+                   mcp->tov * HZ)) {
                        /* Timeout occurred. Return error. */
                        DEBUG2_3_11(printk("%s(%ld): cmd access timeout. "
                            "Exiting.\n", __func__, ha->host_no));
@@ -135,22 +122,6 @@ qla2x00_mailbox_command(scsi_qla_host_t *pvha, mbx_cmd_t 
*mcp)
        /* Wait for mbx cmd completion until timeout */
 
        if (!abort_active && io_lock_on) {
-               /* sleep on completion semaphore */
-               DEBUG11(printk("%s(%ld): INTERRUPT MODE. Initializing timer.\n",
-                   __func__, ha->host_no));
-
-               init_timer(&tmp_intr_timer);
-               tmp_intr_timer.data = (unsigned long)&ha->mbx_intr_sem;
-               tmp_intr_timer.expires = jiffies + mcp->tov * HZ;
-               tmp_intr_timer.function =
-                   (void (*)(unsigned long))qla2x00_mbx_sem_timeout;
-
-               DEBUG11(printk("%s(%ld): Adding timer.\n", __func__,
-                   ha->host_no));
-               add_timer(&tmp_intr_timer);
-
-               DEBUG11(printk("%s(%ld): going to unlock & sleep. "
-                   "time=0x%lx.\n", __func__, ha->host_no, jiffies));
 
                set_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags);
 
@@ -160,17 +131,10 @@ qla2x00_mailbox_command(scsi_qla_host_t *pvha, mbx_cmd_t 
*mcp)
                        WRT_REG_WORD(&reg->isp.hccr, HCCR_SET_HOST_INT);
                spin_unlock_irqrestore(&ha->hardware_lock, flags);
 
-               /* Wait for either the timer to expire
-                * or the mbox completion interrupt
-                */
-               down(&ha->mbx_intr_sem);
+               wait_for_completion_timeout(&ha->mbx_intr_comp, mcp->tov * HZ);
 
-               DEBUG11(printk("%s(%ld): waking up. time=0x%lx\n", __func__,
-                   ha->host_no, jiffies));
                clear_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags);
 
-               /* delete the timer */
-               del_timer(&tmp_intr_timer);
        } else {
                DEBUG3_11(printk("%s(%ld): cmd=%x POLLING MODE.\n", __func__,
                    ha->host_no, command));
@@ -299,7 +263,7 @@ qla2x00_mailbox_command(scsi_qla_host_t *pvha, mbx_cmd_t 
*mcp)
 
        /* Allow next mbx cmd to come in. */
        if (!abort_active)
-               up(&ha->mbx_cmd_sem);
+               complete(&ha->mbx_cmd_comp);
 
        if (rval) {
                DEBUG2_3_11(printk("%s(%ld): **** FAILED. mbx0=%x, mbx1=%x, "
diff --git a/drivers/scsi/qla2xxx/qla_mid.c b/drivers/scsi/qla2xxx/qla_mid.c
index 74096aa..325bdab 100644
--- a/drivers/scsi/qla2xxx/qla_mid.c
+++ b/drivers/scsi/qla2xxx/qla_mid.c
@@ -403,8 +403,9 @@ qla24xx_create_vhost(struct fc_vport *fc_vport)
        }
        vha->mgmt_svr_loop_id = 10 + vha->vp_idx;
 
-       init_MUTEX(&vha->mbx_cmd_sem);
-       init_MUTEX_LOCKED(&vha->mbx_intr_sem);
+       init_completion(&vha->mbx_cmd_comp);
+       complete(&vha->mbx_cmd_comp);
+       init_completion(&vha->mbx_intr_comp);
 
        INIT_LIST_HEAD(&vha->list);
        INIT_LIST_HEAD(&vha->fcports);
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 0a414c0..b9ee565 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -1692,9 +1692,10 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct 
pci_device_id *id)
        /* load the F/W, read paramaters, and init the H/W */
        ha->instance = num_hosts;
 
-       init_MUTEX(&ha->mbx_cmd_sem);
        init_MUTEX(&ha->vport_sem);
-       init_MUTEX_LOCKED(&ha->mbx_intr_sem);
+       init_completion(&ha->mbx_cmd_comp);
+       complete(&ha->mbx_cmd_comp);
+       init_completion(&ha->mbx_intr_comp);
 
        INIT_LIST_HEAD(&ha->list);
        INIT_LIST_HEAD(&ha->fcports);
@@ -2739,23 +2740,6 @@ qla2x00_timer(scsi_qla_host_t *ha)
        qla2x00_restart_timer(ha, WATCH_INTERVAL);
 }
 
-/* XXX(hch): crude hack to emulate a down_timeout() */
-int
-qla2x00_down_timeout(struct semaphore *sema, unsigned long timeout)
-{
-       const unsigned int step = 100; /* msecs */
-       unsigned int iterations = jiffies_to_msecs(timeout)/100;
-
-       do {
-               if (!down_trylock(sema))
-                       return 0;
-               if (msleep_interruptible(step))
-                       break;
-       } while (--iterations > 0);
-
-       return -ETIMEDOUT;
-}
-
 /* Firmware interface routines. */
 
 #define FW_BLOBS       6
-
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