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scsi: mpt3sas: Make MPI2_CONFIG_PAGE_SASIOUNIT_0::PhyData[] a flexible array

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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>
This commit is contained in:
James Seo 2023-08-06 10:05:56 -07:00 committed by Martin K. Petersen
parent cb7c03c5d3
commit dccc1e3ed9
1 changed files with 3 additions and 7 deletions
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10
drivers/scsi/mpt3sas/mpi/mpi2_cnfg.h
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@ -2178,12 +2178,9 @@ typedef struct _MPI2_SAS_IO_UNIT0_PHY_DATA {
*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_SASIOUNIT_0 {
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;