Hi Ulf.
I tested with this patch.
But in my environment, this patch didn't work fine before.
1) When remove/insert, didn't entered the suspend.
2) When removed during something write,
[ 50.755067] FAT-fs (mmcblk1p1): Directory bread(block 8254) failed
[ 50.761235] FAT-fs (mmcblk1p1): Directory bread(block 8255) failed
then at next-time, didn't detect sd-card.
Did you know this?
If you want more information, i will debug, and share the result.
Best Regards,
Jaehoon Chung
On 03/02/2012 12:44 AM, Ulf Hansson wrote:
> Make sure mmc_start_req cancel the prepared job, if the request
> was prevented to be started due to the card has been removed.
>
> This bug was introduced in commit:
> mmc: allow upper layers to know immediately if card has been removed
>
> Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxxxxxx>
> ---
> drivers/mmc/core/core.c | 35 +++++++++++++++--------------------
> 1 files changed, 15 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
> index 0b317f0..9e562ab 100644
> --- a/drivers/mmc/core/core.c
> +++ b/drivers/mmc/core/core.c
> @@ -249,16 +249,17 @@ static void mmc_wait_done(struct mmc_request *mrq)
> complete(&mrq->completion);
> }
>
> -static void __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq)
> +static int __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq)
> {
> init_completion(&mrq->completion);
> mrq->done = mmc_wait_done;
> if (mmc_card_removed(host->card)) {
> mrq->cmd->error = -ENOMEDIUM;
> complete(&mrq->completion);
> - return;
> + return -ENOMEDIUM;
> }
> mmc_start_request(host, mrq);
> + return 0;
> }
>
> static void mmc_wait_for_req_done(struct mmc_host *host,
> @@ -342,6 +343,7 @@ struct mmc_async_req *mmc_start_req(struct mmc_host *host,
> struct mmc_async_req *areq, int *error)
> {
> int err = 0;
> + int start_err = 0;
> struct mmc_async_req *data = host->areq;
>
> /* Prepare a new request */
> @@ -351,30 +353,23 @@ struct mmc_async_req *mmc_start_req(struct mmc_host *host,
> if (host->areq) {
> mmc_wait_for_req_done(host, host->areq->mrq);
> err = host->areq->err_check(host->card, host->areq);
> - if (err) {
> - /* post process the completed failed request */
> - mmc_post_req(host, host->areq->mrq, 0);
> - if (areq)
> - /*
> - * Cancel the new prepared request, because
> - * it can't run until the failed
> - * request has been properly handled.
> - */
> - mmc_post_req(host, areq->mrq, -EINVAL);
> -
> - host->areq = NULL;
> - goto out;
> - }
> }
>
> - if (areq)
> - __mmc_start_req(host, areq->mrq);
> + if (!err && areq)
> + start_err = __mmc_start_req(host, areq->mrq);
>
> if (host->areq)
> mmc_post_req(host, host->areq->mrq, 0);
>
> - host->areq = areq;
> - out:
> + if (err || start_err) {
> + if (areq)
> + /* The prepared request was not started, cancel it. */
> + mmc_post_req(host, areq->mrq, -EINVAL);
> + host->areq = NULL;
> + } else {
> + host->areq = areq;
> + }
> +
> if (error)
> *error = err;
> return data;
--
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