mmc: initialize struct mmc_request at declaration time

Converts from:
	struct mmc_request mrq;
	memset(&mrq, 0, sizeof(struct mmc_request));

to:
	struct mmc_request mrq = {0};

because it's shorter, as performant, and easier to work out whether
initialization has happened.

Signed-off-by: Chris Ball <cjb@laptop.org>

6 files changed, 12 insertions, 34 deletions

diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index fb387c803205..adf0ed3f2c08 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -259,7 +259,7 @@ static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
         u32 result;
         __be32 *blocks;
 
-        struct mmc_request mrq;
+        struct mmc_request mrq = {0};
         struct mmc_command cmd = {0};
         struct mmc_data data = {0};
         unsigned int timeout_us;
@@ -300,8 +300,6 @@ static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
         data.sg = &sg;
         data.sg_len = 1;
 
-        memset(&mrq, 0, sizeof(struct mmc_request));
-
         mrq.cmd = &cmd;
         mrq.data = &data;
 
diff --git a/drivers/mmc/card/mmc_test.c b/drivers/mmc/card/mmc_test.c
index f44762b6e592..35252c1e7a20 100644
--- a/drivers/mmc/card/mmc_test.c
+++ b/drivers/mmc/card/mmc_test.c
@@ -246,15 +246,13 @@ static int mmc_test_buffer_transfer(struct mmc_test_card *test,
 {
         int ret;
 
-        struct mmc_request mrq;
+        struct mmc_request mrq = {0};
         struct mmc_command cmd = {0};
         struct mmc_command stop = {0};
         struct mmc_data data = {0};
 
         struct scatterlist sg;
 
-        memset(&mrq, 0, sizeof(struct mmc_request));
-
         mrq.cmd = &cmd;
         mrq.data = &data;
         mrq.stop = &stop;
@@ -728,13 +726,11 @@ 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;
+        struct mmc_request mrq = {0};
         struct mmc_command cmd = {0};
         struct mmc_command stop = {0};
         struct mmc_data data = {0};
 
-        memset(&mrq, 0, sizeof(struct mmc_request));
-
         mrq.cmd = &cmd;
         mrq.data = &data;
         mrq.stop = &stop;
@@ -755,15 +751,13 @@ 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;
+        struct mmc_request mrq = {0};
         struct mmc_command cmd = {0};
         struct mmc_command stop = {0};
         struct mmc_data data = {0};
 
         struct scatterlist sg;
 
-        memset(&mrq, 0, sizeof(struct mmc_request));
-
         mrq.cmd = &cmd;
         mrq.data = &data;
         mrq.stop = &stop;
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index f273ffd6557a..1dbc18576219 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -236,12 +236,10 @@ EXPORT_SYMBOL(mmc_wait_for_req);
  */
 int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries)
 {
-        struct mmc_request mrq;
+        struct mmc_request mrq = {0};
 
         WARN_ON(!host->claimed);
 
-        memset(&mrq, 0, sizeof(struct mmc_request));
-
         memset(cmd->resp, 0, sizeof(cmd->resp));
         cmd->retries = retries;
 
diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c
index 1ed3866e990f..845ce7c533b9 100644
--- a/drivers/mmc/core/mmc_ops.c
+++ b/drivers/mmc/core/mmc_ops.c
@@ -233,7 +233,7 @@ static int
 mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host,
                 u32 opcode, void *buf, unsigned len)
 {
-        struct mmc_request mrq;
+        struct mmc_request mrq = {0};
         struct mmc_command cmd = {0};
         struct mmc_data data = {0};
         struct scatterlist sg;
@@ -246,8 +246,6 @@ mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host,
         if (data_buf == NULL)
                 return -ENOMEM;
 
-        memset(&mrq, 0, sizeof(struct mmc_request));
-
         mrq.cmd = &cmd;
         mrq.data = &data;
 
@@ -456,7 +454,7 @@ static int
 mmc_send_bus_test(struct mmc_card *card, struct mmc_host *host, u8 opcode,
                   u8 len)
 {
-        struct mmc_request mrq;
+        struct mmc_request mrq = {0};
         struct mmc_command cmd = {0};
         struct mmc_data data = {0};
         struct scatterlist sg;
@@ -487,8 +485,6 @@ mmc_send_bus_test(struct mmc_card *card, struct mmc_host *host, u8 opcode,
         if (opcode == MMC_BUS_TEST_W)
                 memcpy(data_buf, test_buf, len);
 
-        memset(&mrq, 0, sizeof(struct mmc_request));
-
         mrq.cmd = &cmd;
         mrq.data = &data;
         cmd.opcode = opcode;
diff --git a/drivers/mmc/core/sd_ops.c b/drivers/mmc/core/sd_ops.c
index 8023f580b901..a206aea5360d 100644
--- a/drivers/mmc/core/sd_ops.c
+++ b/drivers/mmc/core/sd_ops.c
@@ -66,7 +66,7 @@ static int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card)
 int mmc_wait_for_app_cmd(struct mmc_host *host, struct mmc_card *card,
         struct mmc_command *cmd, int retries)
 {
-        struct mmc_request mrq;
+        struct mmc_request mrq = {0};
 
         int i, err;
 
@@ -243,7 +243,7 @@ int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca)
 int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
 {
         int err;
-        struct mmc_request mrq;
+        struct mmc_request mrq = {0};
         struct mmc_command cmd = {0};
         struct mmc_data data = {0};
         struct scatterlist sg;
@@ -266,8 +266,6 @@ int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
         if (data_buf == NULL)
                 return -ENOMEM;
 
-        memset(&mrq, 0, sizeof(struct mmc_request));
-
         mrq.cmd = &cmd;
         mrq.data = &data;
 
@@ -304,7 +302,7 @@ int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
 int mmc_sd_switch(struct mmc_card *card, int mode, int group,
         u8 value, u8 *resp)
 {
-        struct mmc_request mrq;
+        struct mmc_request mrq = {0};
         struct mmc_command cmd = {0};
         struct mmc_data data = {0};
         struct scatterlist sg;
@@ -317,8 +315,6 @@ int mmc_sd_switch(struct mmc_card *card, int mode, int group,
         mode = !!mode;
         value &= 0xF;
 
-        memset(&mrq, 0, sizeof(struct mmc_request));
-
         mrq.cmd = &cmd;
         mrq.data = &data;
 
@@ -351,7 +347,7 @@ int mmc_sd_switch(struct mmc_card *card, int mode, int group,
 int mmc_app_sd_status(struct mmc_card *card, void *ssr)
 {
         int err;
-        struct mmc_request mrq;
+        struct mmc_request mrq = {0};
         struct mmc_command cmd = {0};
         struct mmc_data data = {0};
         struct scatterlist sg;
@@ -366,8 +362,6 @@ int mmc_app_sd_status(struct mmc_card *card, void *ssr)
         if (err)
                 return err;
 
-        memset(&mrq, 0, sizeof(struct mmc_request));
-
         mrq.cmd = &cmd;
         mrq.data = &data;
 
diff --git a/drivers/mmc/core/sdio_ops.c b/drivers/mmc/core/sdio_ops.c
index 147dfc1879b3..f087d876c573 100644
--- a/drivers/mmc/core/sdio_ops.c
+++ b/drivers/mmc/core/sdio_ops.c
@@ -121,7 +121,7 @@ int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn,
 int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn,
         unsigned addr, int incr_addr, u8 *buf, unsigned blocks, unsigned blksz)
 {
-        struct mmc_request mrq;
+        struct mmc_request mrq = {0};
         struct mmc_command cmd = {0};
         struct mmc_data data = {0};
         struct scatterlist sg;
@@ -136,8 +136,6 @@ int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn,
         if (addr & ~0x1FFFF)
                 return -EINVAL;
 
-        memset(&mrq, 0, sizeof(struct mmc_request));
-
         mrq.cmd = &cmd;
         mrq.data = &data;