Re: [PATCH 3/8] mmc: core: remove BUG_ONs from mmc

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On 2 November 2016 at 08:25, Shawn Lin <shawn.lin@xxxxxxxxxxxxxx> wrote:
> BUG_ONs doesn't help anything except for stop the system from
> running. If it occurs, it implies we should deploy proper error
> handling for that. So this patch is gonna discard these meaningless
> BUG_ONs and deploy error handling if needed.
>
> Signed-off-by: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx>

Thanks, applied for next!

Kind regards
Uffe


> ---
>
>  drivers/mmc/core/mmc.c     | 14 --------------
>  drivers/mmc/core/mmc_ops.c | 17 -----------------
>  2 files changed, 31 deletions(-)
>
> diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
> index e811bd9..4763a35 100644
> --- a/drivers/mmc/core/mmc.c
> +++ b/drivers/mmc/core/mmc.c
> @@ -1464,7 +1464,6 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
>         u32 cid[4];
>         u32 rocr;
>
> -       BUG_ON(!host);
>         WARN_ON(!host->claimed);
>
>         /* Set correct bus mode for MMC before attempting init */
> @@ -1854,9 +1853,6 @@ static int mmc_poweroff_notify(struct mmc_card *card, unsigned int notify_type)
>   */
>  static void mmc_remove(struct mmc_host *host)
>  {
> -       BUG_ON(!host);
> -       BUG_ON(!host->card);
> -
>         mmc_remove_card(host->card);
>         host->card = NULL;
>  }
> @@ -1876,9 +1872,6 @@ static void mmc_detect(struct mmc_host *host)
>  {
>         int err;
>
> -       BUG_ON(!host);
> -       BUG_ON(!host->card);
> -
>         mmc_get_card(host->card);
>
>         /*
> @@ -1904,9 +1897,6 @@ static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
>         unsigned int notify_type = is_suspend ? EXT_CSD_POWER_OFF_SHORT :
>                                         EXT_CSD_POWER_OFF_LONG;
>
> -       BUG_ON(!host);
> -       BUG_ON(!host->card);
> -
>         mmc_claim_host(host);
>
>         if (mmc_card_suspended(host->card))
> @@ -1963,9 +1953,6 @@ static int _mmc_resume(struct mmc_host *host)
>  {
>         int err = 0;
>
> -       BUG_ON(!host);
> -       BUG_ON(!host->card);
> -
>         mmc_claim_host(host);
>
>         if (!mmc_card_suspended(host->card))
> @@ -2098,7 +2085,6 @@ int mmc_attach_mmc(struct mmc_host *host)
>         int err;
>         u32 ocr, rocr;
>
> -       BUG_ON(!host);
>         WARN_ON(!host->claimed);
>
>         /* Set correct bus mode for MMC before attempting attach */
> diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c
> index 481bbdb..2bc4780 100644
> --- a/drivers/mmc/core/mmc_ops.c
> +++ b/drivers/mmc/core/mmc_ops.c
> @@ -60,9 +60,6 @@ static inline int __mmc_send_status(struct mmc_card *card, u32 *status,
>         int err;
>         struct mmc_command cmd = {0};
>
> -       BUG_ON(!card);
> -       BUG_ON(!card->host);
> -
>         cmd.opcode = MMC_SEND_STATUS;
>         if (!mmc_host_is_spi(card->host))
>                 cmd.arg = card->rca << 16;
> @@ -92,8 +89,6 @@ static int _mmc_select_card(struct mmc_host *host, struct mmc_card *card)
>  {
>         struct mmc_command cmd = {0};
>
> -       BUG_ON(!host);
> -
>         cmd.opcode = MMC_SELECT_CARD;
>
>         if (card) {
> @@ -109,7 +104,6 @@ static int _mmc_select_card(struct mmc_host *host, struct mmc_card *card)
>
>  int mmc_select_card(struct mmc_card *card)
>  {
> -       BUG_ON(!card);
>
>         return _mmc_select_card(card->host, card);
>  }
> @@ -181,8 +175,6 @@ int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
>         struct mmc_command cmd = {0};
>         int i, err = 0;
>
> -       BUG_ON(!host);
> -
>         cmd.opcode = MMC_SEND_OP_COND;
>         cmd.arg = mmc_host_is_spi(host) ? 0 : ocr;
>         cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
> @@ -221,9 +213,6 @@ int mmc_all_send_cid(struct mmc_host *host, u32 *cid)
>         int err;
>         struct mmc_command cmd = {0};
>
> -       BUG_ON(!host);
> -       BUG_ON(!cid);
> -
>         cmd.opcode = MMC_ALL_SEND_CID;
>         cmd.arg = 0;
>         cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR;
> @@ -241,9 +230,6 @@ int mmc_set_relative_addr(struct mmc_card *card)
>  {
>         struct mmc_command cmd = {0};
>
> -       BUG_ON(!card);
> -       BUG_ON(!card->host);
> -
>         cmd.opcode = MMC_SET_RELATIVE_ADDR;
>         cmd.arg = card->rca << 16;
>         cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
> @@ -257,9 +243,6 @@ mmc_send_cxd_native(struct mmc_host *host, u32 arg, u32 *cxd, int opcode)
>         int err;
>         struct mmc_command cmd = {0};
>
> -       BUG_ON(!host);
> -       BUG_ON(!cxd);
> -
>         cmd.opcode = opcode;
>         cmd.arg = arg;
>         cmd.flags = MMC_RSP_R2 | MMC_CMD_AC;
> --
> 2.3.7
>
>
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