Commit c7836d15 authored by Masahiro Yamada's avatar Masahiro Yamada Committed by Ulf Hansson
Browse files

mmc: use empty initializer list to zero-clear structures 



In the MMC subsystem, we see such initializers that only clears the
first member explicitly.

For example,

  struct mmc_request mrq = {NULL};

sets the first member (.sbc) to NULL explicitly.  However, this is
an unstable form because we may insert a non-pointer member at the
top of the struct mmc_request in the future. (if we do so, the
compiler will spit warnings.)

So, using a designated initializer is preferred coding style.  The
expression above is equivalent to:

  struct mmc_request mrq = { .sbc = NULL };

Of course, this does not express our intention.  We want to fill
all struct members with zeros.  Please note struct members are
implicitly zero-cleared unless otherwise specified in the initializer.

After all, the most reasonable (and stable) form is:

  struct mmc_request mrq = {};

Do likewise for mmc_command, mmc_data as well.

Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 164b50b3

drivers/mmc/core/block.c

+8 −8
Original line number Diff line number Diff line
@@ -442,9 +442,9 @@ out: 
static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,

			       struct mmc_blk_ioc_data *idata)

{

	struct mmc_command cmd = {0};

	struct mmc_data data = {0};

	struct mmc_request mrq = {NULL};

	struct mmc_command cmd = {};

	struct mmc_data data = {};

	struct mmc_request mrq = {};

	struct scatterlist sg;

	int err;

	int is_rpmb = false;
@@ -768,9 +768,9 @@ static u32 mmc_sd_num_wr_blocks(struct mmc_card *card) 
	u32 result;

	__be32 *blocks;



	struct mmc_request mrq = {NULL};

	struct mmc_command cmd = {0};

	struct mmc_data data = {0};

	struct mmc_request mrq = {};

	struct mmc_command cmd = {};

	struct mmc_data data = {};



	struct scatterlist sg;
@@ -819,7 +819,7 @@ static u32 mmc_sd_num_wr_blocks(struct mmc_card *card) 


static int get_card_status(struct mmc_card *card, u32 *status, int retries)

{

	struct mmc_command cmd = {0};

	struct mmc_command cmd = {};

	int err;



	cmd.opcode = MMC_SEND_STATUS;
@@ -884,7 +884,7 @@ static int send_stop(struct mmc_card *card, unsigned int timeout_ms, 
		struct request *req, bool *gen_err, u32 *stop_status)

{

	struct mmc_host *host = card->host;

	struct mmc_command cmd = {0};

	struct mmc_command cmd = {};

	int err;

	bool use_r1b_resp = rq_data_dir(req) == WRITE;

drivers/mmc/core/core.c

+5 −5
Original line number Diff line number Diff line
@@ -807,7 +807,7 @@ EXPORT_SYMBOL(mmc_interrupt_hpi); 
 */

int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries)

{

	struct mmc_request mrq = {NULL};

	struct mmc_request mrq = {};



	WARN_ON(!host->claimed);
@@ -1648,7 +1648,7 @@ int __mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage) 


int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage, u32 ocr)

{

	struct mmc_command cmd = {0};

	struct mmc_command cmd = {};

	int err = 0;

	u32 clock;
@@ -2129,7 +2129,7 @@ static unsigned int mmc_erase_timeout(struct mmc_card *card, 
static int mmc_do_erase(struct mmc_card *card, unsigned int from,

			unsigned int to, unsigned int arg)

{

	struct mmc_command cmd = {0};

	struct mmc_command cmd = {};

	unsigned int qty = 0, busy_timeout = 0;

	bool use_r1b_resp = false;

	unsigned long timeout;
@@ -2551,7 +2551,7 @@ EXPORT_SYMBOL(mmc_calc_max_discard); 


int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen)

{

	struct mmc_command cmd = {0};

	struct mmc_command cmd = {};



	if (mmc_card_blockaddr(card) || mmc_card_ddr52(card) ||

	    mmc_card_hs400(card) || mmc_card_hs400es(card))
@@ -2567,7 +2567,7 @@ EXPORT_SYMBOL(mmc_set_blocklen); 
int mmc_set_blockcount(struct mmc_card *card, unsigned int blockcount,

			bool is_rel_write)

{

	struct mmc_command cmd = {0};

	struct mmc_command cmd = {};



	cmd.opcode = MMC_SET_BLOCK_COUNT;

	cmd.arg = blockcount & 0x0000FFFF;

drivers/mmc/core/mmc.c

+1 −1
Original line number Diff line number Diff line
@@ -1817,7 +1817,7 @@ static int mmc_can_sleep(struct mmc_card *card) 


static int mmc_sleep(struct mmc_host *host)

{

	struct mmc_command cmd = {0};

	struct mmc_command cmd = {};

	struct mmc_card *card = host->card;

	unsigned int timeout_ms = DIV_ROUND_UP(card->ext_csd.sa_timeout, 10000);

	int err;

drivers/mmc/core/mmc_ops.c

+22 −22
Original line number Diff line number Diff line
@@ -57,7 +57,7 @@ static const u8 tuning_blk_pattern_8bit[] = { 
int mmc_send_status(struct mmc_card *card, u32 *status)

{

	int err;

	struct mmc_command cmd = {0};

	struct mmc_command cmd = {};



	cmd.opcode = MMC_SEND_STATUS;

	if (!mmc_host_is_spi(card->host))
@@ -79,7 +79,7 @@ int mmc_send_status(struct mmc_card *card, u32 *status) 


static int _mmc_select_card(struct mmc_host *host, struct mmc_card *card)

{

	struct mmc_command cmd = {0};

	struct mmc_command cmd = {};



	cmd.opcode = MMC_SELECT_CARD;
@@ -115,7 +115,7 @@ int mmc_deselect_cards(struct mmc_host *host) 
 */

int mmc_set_dsr(struct mmc_host *host)

{

	struct mmc_command cmd = {0};

	struct mmc_command cmd = {};



	cmd.opcode = MMC_SET_DSR;
@@ -128,7 +128,7 @@ int mmc_set_dsr(struct mmc_host *host) 
int mmc_go_idle(struct mmc_host *host)

{

	int err;

	struct mmc_command cmd = {0};

	struct mmc_command cmd = {};



	/*

	 * Non-SPI hosts need to prevent chipselect going active during
@@ -164,7 +164,7 @@ int mmc_go_idle(struct mmc_host *host) 


int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)

{

	struct mmc_command cmd = {0};

	struct mmc_command cmd = {};

	int i, err = 0;



	cmd.opcode = MMC_SEND_OP_COND;
@@ -203,7 +203,7 @@ int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) 
int mmc_all_send_cid(struct mmc_host *host, u32 *cid)

{

	int err;

	struct mmc_command cmd = {0};

	struct mmc_command cmd = {};



	cmd.opcode = MMC_ALL_SEND_CID;

	cmd.arg = 0;
@@ -220,7 +220,7 @@ int mmc_all_send_cid(struct mmc_host *host, u32 *cid) 


int mmc_set_relative_addr(struct mmc_card *card)

{

	struct mmc_command cmd = {0};

	struct mmc_command cmd = {};



	cmd.opcode = MMC_SET_RELATIVE_ADDR;

	cmd.arg = card->rca << 16;
@@ -233,7 +233,7 @@ static int 
mmc_send_cxd_native(struct mmc_host *host, u32 arg, u32 *cxd, int opcode)

{

	int err;

	struct mmc_command cmd = {0};

	struct mmc_command cmd = {};



	cmd.opcode = opcode;

	cmd.arg = arg;
@@ -256,9 +256,9 @@ static int 
mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host,

		u32 opcode, void *buf, unsigned len)

{

	struct mmc_request mrq = {NULL};

	struct mmc_command cmd = {0};

	struct mmc_data data = {0};

	struct mmc_request mrq = {};

	struct mmc_command cmd = {};

	struct mmc_data data = {};

	struct scatterlist sg;



	mrq.cmd = &cmd;
@@ -387,7 +387,7 @@ EXPORT_SYMBOL_GPL(mmc_get_ext_csd); 


int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp)

{

	struct mmc_command cmd = {0};

	struct mmc_command cmd = {};

	int err;



	cmd.opcode = MMC_SPI_READ_OCR;
@@ -402,7 +402,7 @@ int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp) 


int mmc_spi_set_crc(struct mmc_host *host, int use_crc)

{

	struct mmc_command cmd = {0};

	struct mmc_command cmd = {};

	int err;



	cmd.opcode = MMC_SPI_CRC_ON_OFF;
@@ -530,7 +530,7 @@ int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value, 
{

	struct mmc_host *host = card->host;

	int err;

	struct mmc_command cmd = {0};

	struct mmc_command cmd = {};

	bool use_r1b_resp = use_busy_signal;

	unsigned char old_timing = host->ios.timing;
@@ -610,9 +610,9 @@ EXPORT_SYMBOL_GPL(mmc_switch); 


int mmc_send_tuning(struct mmc_host *host, u32 opcode, int *cmd_error)

{

	struct mmc_request mrq = {NULL};

	struct mmc_command cmd = {0};

	struct mmc_data data = {0};

	struct mmc_request mrq = {};

	struct mmc_command cmd = {};

	struct mmc_data data = {};

	struct scatterlist sg;

	struct mmc_ios *ios = &host->ios;

	const u8 *tuning_block_pattern;
@@ -679,7 +679,7 @@ EXPORT_SYMBOL_GPL(mmc_send_tuning); 


int mmc_abort_tuning(struct mmc_host *host, u32 opcode)

{

	struct mmc_command cmd = {0};

	struct mmc_command cmd = {};



	/*

	 * eMMC specification specifies that CMD12 can be used to stop a tuning
@@ -706,9 +706,9 @@ static int 
mmc_send_bus_test(struct mmc_card *card, struct mmc_host *host, u8 opcode,

		  u8 len)

{

	struct mmc_request mrq = {NULL};

	struct mmc_command cmd = {0};

	struct mmc_data data = {0};

	struct mmc_request mrq = {};

	struct mmc_command cmd = {};

	struct mmc_data data = {};

	struct scatterlist sg;

	u8 *data_buf;

	u8 *test_buf;
@@ -802,7 +802,7 @@ int mmc_bus_test(struct mmc_card *card, u8 bus_width) 


int mmc_send_hpi_cmd(struct mmc_card *card, u32 *status)

{

	struct mmc_command cmd = {0};

	struct mmc_command cmd = {};

	unsigned int opcode;

	int err;

drivers/mmc/core/mmc_test.c

+13 −13
Original line number Diff line number Diff line
@@ -260,7 +260,7 @@ static int mmc_test_busy(struct mmc_command *cmd) 
static int mmc_test_wait_busy(struct mmc_test_card *test)

{

	int ret, busy;

	struct mmc_command cmd = {0};

	struct mmc_command cmd = {};



	busy = 0;

	do {
@@ -292,10 +292,10 @@ static int mmc_test_wait_busy(struct mmc_test_card *test) 
static int mmc_test_buffer_transfer(struct mmc_test_card *test,

	u8 *buffer, unsigned addr, unsigned blksz, int write)

{

	struct mmc_request mrq = {0};

	struct mmc_command cmd = {0};

	struct mmc_command stop = {0};

	struct mmc_data data = {0};

	struct mmc_request mrq = {};

	struct mmc_command cmd = {};

	struct mmc_command stop = {};

	struct mmc_data data = {};



	struct scatterlist sg;
@@ -885,10 +885,10 @@ static int mmc_test_simple_transfer(struct mmc_test_card *test, 
	struct scatterlist *sg, unsigned sg_len, unsigned dev_addr,

	unsigned blocks, unsigned blksz, int write)

{

	struct mmc_request mrq = {0};

	struct mmc_command cmd = {0};

	struct mmc_command stop = {0};

	struct mmc_data data = {0};

	struct mmc_request mrq = {};

	struct mmc_command cmd = {};

	struct mmc_command stop = {};

	struct mmc_data data = {};



	mrq.cmd = &cmd;

	mrq.data = &data;
@@ -910,10 +910,10 @@ static int mmc_test_simple_transfer(struct mmc_test_card *test, 
static int mmc_test_broken_transfer(struct mmc_test_card *test,

	unsigned blocks, unsigned blksz, int write)

{

	struct mmc_request mrq = {0};

	struct mmc_command cmd = {0};

	struct mmc_command stop = {0};

	struct mmc_data data = {0};

	struct mmc_request mrq = {};

	struct mmc_command cmd = {};

	struct mmc_command stop = {};

	struct mmc_data data = {};



	struct scatterlist sg;

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