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| author | Linus Walleij <linus.walleij@linaro.org> | 2017-02-01 13:47:57 +0100 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2017-02-14 09:07:59 +0100 |
| commit | 169f03a064c230de6d715bdd62112eb12256fce3 (patch) | |
| tree | 237a211bce3b429b0511040dac6f80b2cb33fe23 /drivers/mmc/core | |
| parent | 9491be5ff06ff08d61e6a8d767382ea0037a6f38 (diff) | |
| download | linux-169f03a064c230de6d715bdd62112eb12256fce3.tar.bz2 | |
mmc: block: return errorcode from mmc_sd_num_wr_blocks()
mmc_sd_num_wr_blocks() has an interesting construction that
saves one return argument by casting (u32)-1 as error code
if something goes wrong.
This is however a bit confusing when the normal kernel
pattern is to return an int error code on success.
So instead pass a variable "blocks" that the function can
fill in with the number of successfully transferred blocks
and return an integer as error code.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
[Ulf: Changed a return code to -EIO, reported by Dan Carpenter and fixed
by Linus Walleij]
Diffstat (limited to 'drivers/mmc/core')
| -rw-r--r-- | drivers/mmc/core/block.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c index 7f0b9af8229c..26191b8bea72 100644 --- a/drivers/mmc/core/block.c +++ b/drivers/mmc/core/block.c @@ -763,7 +763,7 @@ static inline int mmc_blk_part_switch(struct mmc_card *card, return 0; } -static u32 mmc_sd_num_wr_blocks(struct mmc_card *card) +static int mmc_sd_num_wr_blocks(struct mmc_card *card, u32 *written_blocks) { int err; u32 result; @@ -781,9 +781,9 @@ static u32 mmc_sd_num_wr_blocks(struct mmc_card *card) err = mmc_wait_for_cmd(card->host, &cmd, 0); if (err) - return (u32)-1; + return err; if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD)) - return (u32)-1; + return -EIO; memset(&cmd, 0, sizeof(struct mmc_command)); @@ -803,7 +803,7 @@ static u32 mmc_sd_num_wr_blocks(struct mmc_card *card) blocks = kmalloc(4, GFP_KERNEL); if (!blocks) - return (u32)-1; + return -ENOMEM; sg_init_one(&sg, blocks, 4); @@ -813,9 +813,11 @@ static u32 mmc_sd_num_wr_blocks(struct mmc_card *card) kfree(blocks); if (cmd.error || data.error) - result = (u32)-1; + return -EIO; + + *written_blocks = result; - return result; + return 0; } static int get_card_status(struct mmc_card *card, u32 *status, int retries) @@ -1576,9 +1578,10 @@ static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card, */ if (mmc_card_sd(card)) { u32 blocks; + int err; - blocks = mmc_sd_num_wr_blocks(card); - if (blocks != (u32)-1) { + err = mmc_sd_num_wr_blocks(card, &blocks); + if (!err) { ret = blk_end_request(req, 0, blocks << 9); } } else { |