[PATCH v2] scsi: message: fusion: Make compilation warning free

From: Breno Leitao
Date: Tue Aug 13 2024 - 04:46:46 EST


There are a few of unused variable in mptsas, and the compiler complains
about it. Let's get them removed.

drivers/message/fusion/mptsas.c:4234:6: warning: variable 'rc' set but not used [-Wunused-but-set-variable]
4234 | int rc;
drivers/message/fusion/mptsas.c:4793:17: warning: variable 'timeleft' set but not used [-Wunused-but-set-variable]
4793 | unsigned long timeleft;
drivers/message/fusion/mptsas.c:1528:5: warning: variable 'fw_id' set but not used [-Wunused-but-set-variable]
1528 | u8 fw_id;
drivers/message/fusion/mptsas.c:4869:9: warning: variable 'termination_count' set but not used [-Wunused-but-set-variable]
4869 | u32 termination_count;
drivers/message/fusion/mptsas.c:4870:9: warning: variable 'query_count' set but not used [-Wunused-but-set-variable]
4870 | u32 query_count;

Remove those that are unused, and mark others as __maybe_unused, if they
are used depending on the logging option.

Since scsi_device_reprobe() must have its value checked and it isn't,
add a WARN_ON() to let user know if something goes unexpected.

Signed-off-by: Breno Leitao <leitao@xxxxxxxxxx>
---
Changelog:

v2:
* Add a warning if scsi_device_reprobe() fails.
* Mark query_count and termination_count as __maybe_unused.

v1:
* https://lore.kernel.org/all/20240807094000.398857-1-leitao@xxxxxxxxxx/

drivers/message/fusion/mptsas.c | 16 ++++++----------
1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c
index a0bcb0864ecd..00a738ef601c 100644
--- a/drivers/message/fusion/mptsas.c
+++ b/drivers/message/fusion/mptsas.c
@@ -1447,7 +1447,7 @@ mptsas_add_end_device(MPT_ADAPTER *ioc, struct mptsas_phyinfo *phy_info)
struct sas_port *port;
struct sas_identify identify;
char *ds = NULL;
- u8 fw_id;
+ u8 fw_id __maybe_unused;

if (!phy_info) {
dfailprintk(ioc, printk(MYIOC_s_ERR_FMT
@@ -1525,7 +1525,7 @@ mptsas_del_end_device(MPT_ADAPTER *ioc, struct mptsas_phyinfo *phy_info)
struct mptsas_phyinfo *phy_info_parent;
int i;
char *ds = NULL;
- u8 fw_id;
+ u8 fw_id __maybe_unused;
u64 sas_address;

if (!phy_info)
@@ -4231,10 +4231,8 @@ mptsas_find_phyinfo_by_phys_disk_num(MPT_ADAPTER *ioc, u8 phys_disk_num,
static void
mptsas_reprobe_lun(struct scsi_device *sdev, void *data)
{
- int rc;
-
sdev->no_uld_attach = data ? 1 : 0;
- rc = scsi_device_reprobe(sdev);
+ WARN_ON(scsi_device_reprobe(sdev));
}

static void
@@ -4790,7 +4788,6 @@ mptsas_issue_tm(MPT_ADAPTER *ioc, u8 type, u8 channel, u8 id, u64 lun,
MPT_FRAME_HDR *mf;
SCSITaskMgmt_t *pScsiTm;
int retval;
- unsigned long timeleft;

*issue_reset = 0;
mf = mpt_get_msg_frame(mptsasDeviceResetCtx, ioc);
@@ -4826,8 +4823,7 @@ mptsas_issue_tm(MPT_ADAPTER *ioc, u8 type, u8 channel, u8 id, u64 lun,
mpt_put_msg_frame_hi_pri(mptsasDeviceResetCtx, ioc, mf);

/* Now wait for the command to complete */
- timeleft = wait_for_completion_timeout(&ioc->taskmgmt_cmds.done,
- timeout*HZ);
+ wait_for_completion_timeout(&ioc->taskmgmt_cmds.done, timeout * HZ);
if (!(ioc->taskmgmt_cmds.status & MPT_MGMT_STATUS_COMMAND_GOOD)) {
retval = -1; /* return failure */
dtmprintk(ioc, printk(MYIOC_s_ERR_FMT
@@ -4870,8 +4866,8 @@ mptsas_broadcast_primitive_work(struct fw_event_work *fw_event)
int task_context;
u8 channel, id;
int lun;
- u32 termination_count;
- u32 query_count;
+ u32 termination_count __maybe_unused;
+ u32 query_count __maybe_unused;

dtmprintk(ioc, printk(MYIOC_s_DEBUG_FMT
"%s - enter\n", ioc->name, __func__));
--
2.43.5