From fe242579e9f33150868f1bb79c7e262ad7953f17 Mon Sep 17 00:00:00 2001 From: Stefan Richter Date: Thu, 8 Oct 2009 00:42:27 +0200 Subject: firewire: core: clarify generate_config_rom usage Move the static config ROM buffer into the scope of the two callers of generate_config_rom(). That way the ROM length can be passed over as return value rather than through a pointer argument. It also becomes more obvious that accesses to the config ROM buffer have to be serialized and how this is accomplished. And firewire-core.ko shrinks a bit as well. Signed-off-by: Stefan Richter --- drivers/firewire/core-card.c | 19 ++++++++----------- 1 file changed, 8 insertions(+), 11 deletions(-) (limited to 'drivers/firewire') diff --git a/drivers/firewire/core-card.c b/drivers/firewire/core-card.c index f73e3bdfc84c..f58130789990 100644 --- a/drivers/firewire/core-card.c +++ b/drivers/firewire/core-card.c @@ -69,6 +69,8 @@ static LIST_HEAD(card_list); static LIST_HEAD(descriptor_list); static int descriptor_count; +static __be32 tmp_config_rom[256]; + #define BIB_CRC(v) ((v) << 0) #define BIB_CRC_LENGTH(v) ((v) << 16) #define BIB_INFO_LENGTH(v) ((v) << 24) @@ -84,10 +86,9 @@ static int descriptor_count; #define BIB_CMC ((1) << 30) #define BIB_IMC ((1) << 31) -static __be32 *generate_config_rom(struct fw_card *card, size_t *rom_length) +static size_t generate_config_rom(struct fw_card *card, __be32 *config_rom) { struct fw_descriptor *desc; - static __be32 config_rom[256]; int i, j, k, length; /* @@ -142,20 +143,17 @@ static __be32 *generate_config_rom(struct fw_card *card, size_t *rom_length) for (i = 0; i < j; i += length + 1) length = __compute_block_crc(config_rom + i); - *rom_length = j; - - return config_rom; + return j; } static void update_config_roms(void) { struct fw_card *card; - __be32 *config_rom; size_t length; list_for_each_entry (card, &card_list, link) { - config_rom = generate_config_rom(card, &length); - card->driver->set_config_rom(card, config_rom, length); + length = generate_config_rom(card, tmp_config_rom); + card->driver->set_config_rom(card, tmp_config_rom, length); } } @@ -443,7 +441,6 @@ EXPORT_SYMBOL(fw_card_initialize); int fw_card_add(struct fw_card *card, u32 max_receive, u32 link_speed, u64 guid) { - __be32 *config_rom; size_t length; int ret; @@ -453,8 +450,8 @@ int fw_card_add(struct fw_card *card, mutex_lock(&card_mutex); - config_rom = generate_config_rom(card, &length); - ret = card->driver->enable(card, config_rom, length); + length = generate_config_rom(card, tmp_config_rom); + ret = card->driver->enable(card, tmp_config_rom, length); if (ret == 0) list_add_tail(&card->link, &card_list); -- cgit v1.2.3