From: James Seo <james@equiv.tech>
Date: Sun, 6 Aug 2023 10:05:56 -0700
Subject: scsi: mpt3sas: Make MPI2_CONFIG_PAGE_SASIOUNIT_0::PhyData[] a
flexible array
Patch-mainline: v6.8-rc1
Git-commit: dccc1e3ed9e3c613fa9f4b335d12cab89e2273c1
References: bsc#1219551
This terminal 1-length variable array can be directly converted into a C99
flexible array member.
As all users of MPI2_CONFIG_PAGE_SASIOUNIT_0 (Mpi2SasIOUnitPage0_t) either
calculate its size without depending on its sizeof() or do not use
PhyData[], no further source changes are required:
- mpt3sas_config.c:mpt3sas_config_get_number_hba_phys() fetches a
Mpi2SasIOUnitPage0_t for itself, but does not use PhyData[].
- mpt3sas_config.c:mpt3sas_config_get_sas_iounit_pg0() fetches a
Mpi2SasIOUnitPage0_t into a caller-provided buffer, and may fetch and
write PhyData[] into that buffer depending on its sz argument. Its
callers:
- mpt3sas_scsih.c:_scsih_update_vphys_after_reset(),
mpt3sas_scsih.c:_scsih_get_port_table_after_reset(),
mpt3sas_scsih.c:_scsih_sas_host_refresh(),
mpt3sas_scsih.c:_scsih_sas_host_add(), and
mpt3sas_transport.c:_transport_phy_enable() all calculate sz
independently of sizeof(Mpi2SasIOUnitPage0_t) and allocate a
suitable buffer before calling mpt3sas_config_get_sas_iounit_pg0()
and using PhyData[].
Signed-off-by: James Seo <james@equiv.tech>
Link: https://lore.kernel.org/r/20230806170604.16143-5-james@equiv.tech
Tested-by: Borislav Petkov (AMD) <bp@alien8.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Martin Wilck <mwilck@suse.com>
---
drivers/scsi/mpt3sas/mpi/mpi2_cnfg.h | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)
--- a/drivers/scsi/mpt3sas/mpi/mpi2_cnfg.h
+++ b/drivers/scsi/mpt3sas/mpi/mpi2_cnfg.h
@@ -2178,12 +2178,9 @@ typedef struct _MPI2_SAS_IO_UNIT0_PHY_DA
*pMpi2SasIOUnit0PhyData_t;
/*
- *Host code (drivers, BIOS, utilities, etc.) should leave this define set to
- *one and check the value returned for NumPhys at runtime.
+ *Host code (drivers, BIOS, utilities, etc.) should check the value returned
+ *for NumPhys at runtime before using PhyData[].
*/
-#ifndef MPI2_SAS_IOUNIT0_PHY_MAX
-#define MPI2_SAS_IOUNIT0_PHY_MAX (1)
-#endif
typedef struct _MPI2_CONFIG_PAGE_SASIOUNIT_0 {
MPI2_CONFIG_EXTENDED_PAGE_HEADER Header; /*0x00 */
@@ -2191,8 +2188,7 @@ typedef struct _MPI2_CONFIG_PAGE_SASIOUN
U8 NumPhys; /*0x0C */
U8 Reserved2;/*0x0D */
U16 Reserved3;/*0x0E */
- MPI2_SAS_IO_UNIT0_PHY_DATA
- PhyData[MPI2_SAS_IOUNIT0_PHY_MAX]; /*0x10 */
+ MPI2_SAS_IO_UNIT0_PHY_DATA PhyData[];/*0x10 */
} MPI2_CONFIG_PAGE_SASIOUNIT_0,
*PTR_MPI2_CONFIG_PAGE_SASIOUNIT_0,
Mpi2SasIOUnitPage0_t, *pMpi2SasIOUnitPage0_t;