| Message ID | 10228473.uOqbQ0oioV@wasted.cogentembedded.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 18 September 2014 21:33, Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> wrote: > I spent a couple of days with the driver just hanging due to me forgetting to > specify the external crystal frequency, so that clk_get_rate() returned 0 and > thus the loop in tmio_mmc_set_clock() never ended. I don't think that's an > acceptable behavior, so I suggest that the minimum frequency is checked for 0 > in tmio_mmc_host_probe(). > > Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> > Acked-by: Ian Molton <ian.molton@codethink.co.uk> > Cc: stable@vger.kernel.org Thanks! Applied for next with a smaller change - adding a "mmc" prefix for the commit message subject. Kind regards Uffe > > --- > The patch is against Ulf Hansson's 'mmc.git' repo's 'next' branch. > > Changes in version 4: > - rebased to the 'next' branch, resolving reject; > - added Ian Molton's ACK. > > Changes in version 3: > - added Cc: stable. > > Changes in version 2: > - fixed grammar in the changelog. > > drivers/mmc/host/tmio_mmc_pio.c | 9 +++++++++ > 1 file changed, 9 insertions(+) > > Index: mmc/drivers/mmc/host/tmio_mmc_pio.c > =================================================================== > --- mmc.orig/drivers/mmc/host/tmio_mmc_pio.c > +++ mmc/drivers/mmc/host/tmio_mmc_pio.c > @@ -1091,6 +1091,15 @@ int tmio_mmc_host_probe(struct tmio_mmc_ > } > > /* > + * Check the sanity of mmc->f_min to prevent tmio_mmc_set_clock() from > + * looping forever... > + */ > + if (mmc->f_min == 0) { > + ret = -EINVAL; > + goto host_free; > + } > + > + /* > * While using internal tmio hardware logic for card detection, we need > * to ensure it stays powered for it to work. > */ > -- 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
Index: mmc/drivers/mmc/host/tmio_mmc_pio.c =================================================================== --- mmc.orig/drivers/mmc/host/tmio_mmc_pio.c +++ mmc/drivers/mmc/host/tmio_mmc_pio.c @@ -1091,6 +1091,15 @@ int tmio_mmc_host_probe(struct tmio_mmc_ } /* + * Check the sanity of mmc->f_min to prevent tmio_mmc_set_clock() from + * looping forever... + */ + if (mmc->f_min == 0) { + ret = -EINVAL; + goto host_free; + } + + /* * While using internal tmio hardware logic for card detection, we need * to ensure it stays powered for it to work. */