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mmc: use empty initializer list to zero-clear structures

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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: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Masahiro Yamada
2016-12-19 20:51:18 +09:00
committed by Ulf Hansson
parent 164b50b353
commit c7836d1593
10 changed files with 73 additions and 73 deletions
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10
drivers/mmc/core/core.c
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@@ -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;