[PATCH 04/12] message: Convert to host_lock less w/ interrupts disabled externally

Nicholas A. Bellinger
2010-12-19T21:22:38Z

From: Nicholas Bellinger <nab@linux-iscsi.org>

This patch converts the message/fusion mptsas, mptscsih and mptspi
to run in host_lock less mode with the new IRQ_DISABLE_SCSI_QCMD()
that disables interrupts while calling ->queuecommand() dispatch.

Note that mptfc.c is left out as it checks libfc rport state, which
for the moment still needs the host lock.

Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
drivers/message/fusion/mptfc.c | 2 +-
drivers/message/fusion/mptsas.c | 6 +++---
drivers/message/fusion/mptscsih.c | 8 +++++---
drivers/message/fusion/mptscsih.h | 2 +-
drivers/message/fusion/mptspi.c | 6 +++---
5 files changed, 13 insertions(+), 11 deletions(-)

diff --git a/drivers/message/fusion/mptfc.c b/drivers/message/fusion/mptfc.c
index d784c36..349b3c7 100644
--- a/drivers/message/fusion/mptfc.c
+++ b/drivers/message/fusion/mptfc.c
@@ -677,7 +677,7 @@ mptfc_qcmd_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
return 0;
}

- return mptscsih_qcmd(SCpnt,done);
+ return mptscsih_qcmd(SCpnt->device->host, SCpnt);
}

static DEF_SCSI_QCMD(mptfc_qcmd)
diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c
index d48c2c6..f0d205e 100644
--- a/drivers/message/fusion/mptsas.c
+++ b/drivers/message/fusion/mptsas.c
@@ -1889,7 +1889,7 @@ mptsas_slave_alloc(struct scsi_device *sdev)
}

static int
-mptsas_qcmd_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
+mptsas_qcmd_irq_disable(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
{
MPT_SCSI_HOST *hd;
MPT_ADAPTER *ioc;
@@ -1910,10 +1910,10 @@ mptsas_qcmd_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
if (ioc->debug_level & MPT_DEBUG_SCSI)
scsi_print_command(SCpnt);

- return mptscsih_qcmd(SCpnt,done);
+ return mptscsih_qcmd(SCpnt->device->host, SCpnt);
}

-static DEF_SCSI_QCMD(mptsas_qcmd)
+static IRQ_DISABLE_SCSI_QCMD(mptsas_qcmd)

/**
* mptsas_mptsas_eh_timed_out - resets the scsi_cmnd timeout
diff --git a/drivers/message/fusion/mptscsih.c b/drivers/message/fusion/mptscsih.c
index 59b8f53..4ff996e 100644
--- a/drivers/message/fusion/mptscsih.c
+++ b/drivers/message/fusion/mptscsih.c
@@ -1383,7 +1383,7 @@ mptscsih_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t off

/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/**
- * mptscsih_qcmd - Primary Fusion MPT SCSI initiator IO start routine.
+ * mptscsih_qcmd_irq_disable - Primary Fusion MPT SCSI initiator IO start routine.
* @SCpnt: Pointer to scsi_cmnd structure
* @done: Pointer SCSI mid-layer IO completion function
*
@@ -1393,8 +1393,8 @@ mptscsih_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t off
*
* Returns 0. (rtn value discarded by linux scsi mid-layer)
*/
-int
-mptscsih_qcmd(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
+static int
+mptscsih_qcmd_irq_disable(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
{
MPT_SCSI_HOST *hd;
MPT_FRAME_HDR *mf;
@@ -1529,6 +1529,8 @@ mptscsih_qcmd(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
return SCSI_MLQUEUE_HOST_BUSY;
}

+IRQ_DISABLE_SCSI_QCMD(mptscsih_qcmd);
+
/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
/*
* mptscsih_freeChainBuffers - Function to free chain buffers associated
diff --git a/drivers/message/fusion/mptscsih.h b/drivers/message/fusion/mptscsih.h
index 45a5ff3..1815aef 100644
--- a/drivers/message/fusion/mptscsih.h
+++ b/drivers/message/fusion/mptscsih.h
@@ -113,7 +113,7 @@ extern int mptscsih_resume(struct pci_dev *pdev);
#endif
extern int mptscsih_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset, int length, int func);
extern const char * mptscsih_info(struct Scsi_Host *SChost);
-extern int mptscsih_qcmd(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *));
+extern int mptscsih_qcmd(struct Scsi_Host *sh, struct scsi_cmnd *SCpnt);
extern int mptscsih_IssueTaskMgmt(MPT_SCSI_HOST *hd, u8 type, u8 channel,
u8 id, int lun, int ctx2abort, ulong timeout);
extern void mptscsih_slave_destroy(struct scsi_device *device);
diff --git a/drivers/message/fusion/mptspi.c b/drivers/message/fusion/mptspi.c
index 6d9568d..53eec57 100644
--- a/drivers/message/fusion/mptspi.c
+++ b/drivers/message/fusion/mptspi.c
@@ -780,7 +780,7 @@ static int mptspi_slave_configure(struct scsi_device *sdev)
}

static int
-mptspi_qcmd_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
+mptspi_qcmd_irq_disable(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
{
struct _MPT_SCSI_HOST *hd = shost_priv(SCpnt->device->host);
VirtDevice *vdevice = SCpnt->device->hostdata;
@@ -802,10 +802,10 @@ mptspi_qcmd_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
if (spi_dv_pending(scsi_target(SCpnt->device)))
ddvprintk(ioc, scsi_print_command(SCpnt));

- return mptscsih_qcmd(SCpnt,done);
+ return mptscsih_qcmd(SCpnt->device->host, SCpnt);
}

-static DEF_SCSI_QCMD(mptspi_qcmd)
+static IRQ_DISABLE_SCSI_QCMD(mptspi_qcmd)

static void mptspi_slave_destroy(struct scsi_device *sdev)
{
--
1.7.3.4