[PATCH 02/18] scsi: mpt3sas: mpt3sas_scs: Move a little data from the stack onto the heap

From: Lee Jones
Date: Wed Mar 17 2021 - 04:57:51 EST


Fixes the following W=1 kernel build warning(s):

drivers/scsi/mpt3sas/mpt3sas_scsih.c: In function ‘_scsih_scan_for_devices_after_reset’:
drivers/scsi/mpt3sas/mpt3sas_scsih.c:10473:1: warning: the frame size of 1064 bytes is larger than 1024 bytes [-Wframe-larger-than=]

Cc: Sathya Prakash <sathya.prakash@xxxxxxxxxxxx>
Cc: Sreekanth Reddy <sreekanth.reddy@xxxxxxxxxxxx>
Cc: Suganath Prabu Subramani <suganath-prabu.subramani@xxxxxxxxxxxx>
Cc: "James E.J. Bottomley" <jejb@xxxxxxxxxxxxx>
Cc: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>
Cc: MPT-FusionLinux.pdl@xxxxxxxxxxxxx
Cc: MPT-FusionLinux.pdl@xxxxxxxxxxxx
Cc: linux-scsi@xxxxxxxxxxxxxxx
Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
---
drivers/scsi/mpt3sas/mpt3sas_scsih.c | 38 +++++++++++++++++++---------
1 file changed, 26 insertions(+), 12 deletions(-)

diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
index 7bd0a57e5b928..945531e94d7e4 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
@@ -10219,8 +10219,8 @@ _scsih_scan_for_devices_after_reset(struct MPT3SAS_ADAPTER *ioc)
Mpi2ExpanderPage0_t expander_pg0;
Mpi2SasDevicePage0_t sas_device_pg0;
Mpi26PCIeDevicePage0_t pcie_device_pg0;
- Mpi2RaidVolPage1_t volume_pg1;
- Mpi2RaidVolPage0_t volume_pg0;
+ Mpi2RaidVolPage1_t *volume_pg1;
+ Mpi2RaidVolPage0_t *volume_pg0;
Mpi2RaidPhysDiskPage0_t pd_pg0;
Mpi2EventIrConfigElement_t element;
Mpi2ConfigReply_t mpi_reply;
@@ -10235,6 +10235,16 @@ _scsih_scan_for_devices_after_reset(struct MPT3SAS_ADAPTER *ioc)
u8 retry_count;
unsigned long flags;

+ volume_pg0 = kzalloc(sizeof(*volume_pg0), GFP_KERNEL);
+ if (!volume_pg0)
+ return;
+
+ volume_pg1 = kzalloc(sizeof(*volume_pg1), GFP_KERNEL);
+ if (!volume_pg1) {
+ kfree(volume_pg0);
+ return;
+ }
+
ioc_info(ioc, "scan devices: start\n");

_scsih_sas_host_refresh(ioc);
@@ -10344,7 +10354,7 @@ _scsih_scan_for_devices_after_reset(struct MPT3SAS_ADAPTER *ioc)
/* volumes */
handle = 0xFFFF;
while (!(mpt3sas_config_get_raid_volume_pg1(ioc, &mpi_reply,
- &volume_pg1, MPI2_RAID_VOLUME_PGAD_FORM_GET_NEXT_HANDLE, handle))) {
+ volume_pg1, MPI2_RAID_VOLUME_PGAD_FORM_GET_NEXT_HANDLE, handle))) {
ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
MPI2_IOCSTATUS_MASK;
if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
@@ -10352,15 +10362,15 @@ _scsih_scan_for_devices_after_reset(struct MPT3SAS_ADAPTER *ioc)
ioc_status, le32_to_cpu(mpi_reply.IOCLogInfo));
break;
}
- handle = le16_to_cpu(volume_pg1.DevHandle);
+ handle = le16_to_cpu(volume_pg1->DevHandle);
spin_lock_irqsave(&ioc->raid_device_lock, flags);
raid_device = _scsih_raid_device_find_by_wwid(ioc,
- le64_to_cpu(volume_pg1.WWID));
+ le64_to_cpu(volume_pg1->WWID));
spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
if (raid_device)
continue;
if (mpt3sas_config_get_raid_volume_pg0(ioc, &mpi_reply,
- &volume_pg0, MPI2_RAID_VOLUME_PGAD_FORM_HANDLE, handle,
+ volume_pg0, MPI2_RAID_VOLUME_PGAD_FORM_HANDLE, handle,
sizeof(Mpi2RaidVolPage0_t)))
continue;
ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
@@ -10370,17 +10380,17 @@ _scsih_scan_for_devices_after_reset(struct MPT3SAS_ADAPTER *ioc)
ioc_status, le32_to_cpu(mpi_reply.IOCLogInfo));
break;
}
- if (volume_pg0.VolumeState == MPI2_RAID_VOL_STATE_OPTIMAL ||
- volume_pg0.VolumeState == MPI2_RAID_VOL_STATE_ONLINE ||
- volume_pg0.VolumeState == MPI2_RAID_VOL_STATE_DEGRADED) {
+ if (volume_pg0->VolumeState == MPI2_RAID_VOL_STATE_OPTIMAL ||
+ volume_pg0->VolumeState == MPI2_RAID_VOL_STATE_ONLINE ||
+ volume_pg0->VolumeState == MPI2_RAID_VOL_STATE_DEGRADED) {
memset(&element, 0, sizeof(Mpi2EventIrConfigElement_t));
element.ReasonCode = MPI2_EVENT_IR_CHANGE_RC_ADDED;
- element.VolDevHandle = volume_pg1.DevHandle;
+ element.VolDevHandle = volume_pg1->DevHandle;
ioc_info(ioc, "\tBEFORE adding volume: handle (0x%04x)\n",
- volume_pg1.DevHandle);
+ volume_pg1->DevHandle);
_scsih_sas_volume_add(ioc, &element);
ioc_info(ioc, "\tAFTER adding volume: handle (0x%04x)\n",
- volume_pg1.DevHandle);
+ volume_pg1->DevHandle);
}
}

@@ -10468,6 +10478,10 @@ _scsih_scan_for_devices_after_reset(struct MPT3SAS_ADAPTER *ioc)
ioc_info(ioc, "\tAFTER adding pcie end device: handle (0x%04x), wwid(0x%016llx)\n",
handle, (u64)le64_to_cpu(pcie_device_pg0.WWID));
}
+
+ kfree(volume_pg0);
+ kfree(volume_pg1);
+
ioc_info(ioc, "\tpcie devices: pcie end devices complete\n");
ioc_info(ioc, "scan devices: complete\n");
}
--
2.27.0