bna: Avoid clashing function prototypes

When built with Control Flow Integrity, function prototypes between
caller and function declaration must match. These mismatches are visible
at compile time with the new -Wcast-function-type-strict in Clang[1].

Fix a total of 227 warnings like these:

drivers/net/ethernet/brocade/bna/bna_enet.c:519:3: warning: cast from 'void (*)(struct bna_ethport *, enum bna_ethport_event)' to 'bfa_fsm_t' (aka 'void (*)(void *, int)') converts to incompatible function type [-Wcast-function-type-strict]
                bfa_fsm_set_state(ethport, bna_ethport_sm_down);
                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The bna state machine code heavily overloads its state machine functions,
so these have been separated into their own sets of structs, enums,
typedefs, and helper functions. There are almost zero binary code changes,
all seem to be related to header file line numbers changing, or the
addition of the new stats helper.

Important to mention is that while I was manually implementing this changes
I was staring at this[2] patch from Kees Cook. Thanks, Kees. :)

Link: https://github.com/KSPP/linux/issues/240
[1] https://reviews.llvm.org/D134831
[2] https://lore.kernel.org/linux-hardening/20220929230334.2109344-1-keescook@chromium.org/
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 5 deletions

diff --git a/drivers/net/ethernet/brocade/bna/bfa_ioc.c b/drivers/net/ethernet/brocade/bna/bfa_ioc.c
index cd933817a0b8..b07522ac3e74 100644
--- a/drivers/net/ethernet/brocade/bna/bfa_ioc.c
+++ b/drivers/net/ethernet/brocade/bna/bfa_ioc.c
@@ -114,7 +114,7 @@ bfa_fsm_state_decl(bfa_ioc, disabling, struct bfa_ioc, enum ioc_event);
 bfa_fsm_state_decl(bfa_ioc, disabled, struct bfa_ioc, enum ioc_event);
 bfa_fsm_state_decl(bfa_ioc, hwfail, struct bfa_ioc, enum ioc_event);
 
-static struct bfa_sm_table ioc_sm_table[] = {
+static struct ioc_sm_table_s ioc_sm_table[] = {
 	{BFA_SM(bfa_ioc_sm_uninit), BFA_IOC_UNINIT},
 	{BFA_SM(bfa_ioc_sm_reset), BFA_IOC_RESET},
 	{BFA_SM(bfa_ioc_sm_enabling), BFA_IOC_ENABLING},
@@ -183,7 +183,7 @@ bfa_fsm_state_decl(bfa_iocpf, disabling_sync, struct bfa_iocpf,
 						enum iocpf_event);
 bfa_fsm_state_decl(bfa_iocpf, disabled, struct bfa_iocpf, enum iocpf_event);
 
-static struct bfa_sm_table iocpf_sm_table[] = {
+static struct iocpf_sm_table_s iocpf_sm_table[] = {
 	{BFA_SM(bfa_iocpf_sm_reset), BFA_IOCPF_RESET},
 	{BFA_SM(bfa_iocpf_sm_fwcheck), BFA_IOCPF_FWMISMATCH},
 	{BFA_SM(bfa_iocpf_sm_mismatch), BFA_IOCPF_FWMISMATCH},
@@ -2860,12 +2860,12 @@ static enum bfa_ioc_state
 bfa_ioc_get_state(struct bfa_ioc *ioc)
 {
 	enum bfa_iocpf_state iocpf_st;
-	enum bfa_ioc_state ioc_st = bfa_sm_to_state(ioc_sm_table, ioc->fsm);
+	enum bfa_ioc_state ioc_st = ioc_sm_to_state(ioc_sm_table, ioc->fsm);
 
 	if (ioc_st == BFA_IOC_ENABLING ||
 		ioc_st == BFA_IOC_FAIL || ioc_st == BFA_IOC_INITFAIL) {
 
-		iocpf_st = bfa_sm_to_state(iocpf_sm_table, ioc->iocpf.fsm);
+		iocpf_st = iocpf_sm_to_state(iocpf_sm_table, ioc->iocpf.fsm);
 
 		switch (iocpf_st) {
 		case BFA_IOCPF_SEMWAIT:
@@ -2983,7 +2983,7 @@ bfa_nw_iocpf_timeout(struct bfa_ioc *ioc)
 {
 	enum bfa_iocpf_state iocpf_st;
 
-	iocpf_st = bfa_sm_to_state(iocpf_sm_table, ioc->iocpf.fsm);
+	iocpf_st = iocpf_sm_to_state(iocpf_sm_table, ioc->iocpf.fsm);
 
 	if (iocpf_st == BFA_IOCPF_HWINIT)
 		bfa_ioc_poll_fwinit(ioc);