| Message ID | 48ff46b96e01df36aa5d1c2daf1091d2ec2e729f.1473215578.git.baolin.wang@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 7 September 2016 at 04:38, Baolin Wang <baolin.wang@linaro.org> wrote: > In order to clean up the mmc_erase() function and do some optimization > for erase size alignment, factor out the guts of erase size alignment > into mmc_align_erase_size() function. > > Signed-off-by: Baolin Wang <baolin.wang@linaro.org> > Tested-by: Shawn Lin <shawn.lin@rock-chips.com> Thanks, applied for next! Kind regards Uffe > --- > Changes since v4: > - Abandon the patch removing the checking if mmc can erase. > - Add missing validations in mmc_erase(). > > Changes since v3: > - Split into 3 separate patches. > - Add test tag by Shawn. > > Changes since v2: > - Add nr checking and other optimization in mmc_erase() function. > > Changes since v1: > - Add the alignment if card->erase_size is not power of 2. > --- > drivers/mmc/core/core.c | 48 +++++++++++++++++++++++++++++++---------------- > 1 file changed, 32 insertions(+), 16 deletions(-) > > diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c > index e55cde6..11b4897 100644 > --- a/drivers/mmc/core/core.c > +++ b/drivers/mmc/core/core.c > @@ -2202,6 +2202,36 @@ out: > return err; > } > > +static unsigned int mmc_align_erase_size(struct mmc_card *card, > + unsigned int *from, > + unsigned int *to, > + unsigned int nr) > +{ > + unsigned int from_new = *from, nr_new = nr, rem; > + > + rem = from_new % card->erase_size; > + if (rem) { > + rem = card->erase_size - rem; > + from_new += rem; > + if (nr_new > rem) > + nr_new -= rem; > + else > + return 0; > + } > + > + rem = nr_new % card->erase_size; > + if (rem) > + nr_new -= rem; > + > + if (nr_new == 0) > + return 0; > + > + *to = from_new + nr_new; > + *from = from_new; > + > + return nr_new; > +} > + > /** > * mmc_erase - erase sectors. > * @card: card to erase > @@ -2240,26 +2270,12 @@ int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr, > return -EINVAL; > } > > - if (arg == MMC_ERASE_ARG) { > - rem = from % card->erase_size; > - if (rem) { > - rem = card->erase_size - rem; > - from += rem; > - if (nr > rem) > - nr -= rem; > - else > - return 0; > - } > - rem = nr % card->erase_size; > - if (rem) > - nr -= rem; > - } > + if (arg == MMC_ERASE_ARG) > + nr = mmc_align_erase_size(card, &from, &to, nr); > > if (nr == 0) > return 0; > > - to = from + nr; > - > if (to <= from) > return -EINVAL; > > -- > 1.7.9.5 > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index e55cde6..11b4897 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -2202,6 +2202,36 @@ out: return err; } +static unsigned int mmc_align_erase_size(struct mmc_card *card, + unsigned int *from, + unsigned int *to, + unsigned int nr) +{ + unsigned int from_new = *from, nr_new = nr, rem; + + rem = from_new % card->erase_size; + if (rem) { + rem = card->erase_size - rem; + from_new += rem; + if (nr_new > rem) + nr_new -= rem; + else + return 0; + } + + rem = nr_new % card->erase_size; + if (rem) + nr_new -= rem; + + if (nr_new == 0) + return 0; + + *to = from_new + nr_new; + *from = from_new; + + return nr_new; +} + /** * mmc_erase - erase sectors. * @card: card to erase @@ -2240,26 +2270,12 @@ int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr, return -EINVAL; } - if (arg == MMC_ERASE_ARG) { - rem = from % card->erase_size; - if (rem) { - rem = card->erase_size - rem; - from += rem; - if (nr > rem) - nr -= rem; - else - return 0; - } - rem = nr % card->erase_size; - if (rem) - nr -= rem; - } + if (arg == MMC_ERASE_ARG) + nr = mmc_align_erase_size(card, &from, &to, nr); if (nr == 0) return 0; - to = from + nr; - if (to <= from) return -EINVAL;