Hi Greg,
On Mon, May 14, 2018 at 11:04 AM, Greg Kroah-Hartman
<gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> On Mon, May 14, 2018 at 09:32:51AM +0200, Geert Uytterhoeven wrote:
>> On Mon, May 14, 2018 at 8:48 AM, Greg Kroah-Hartman
>> <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
>> > 4.16-stable review patch. If anyone has any objections, please let me know.
>> >
>> > ------------------
>> >
>> > From: Boris Brezillon <boris.brezillon@xxxxxxxxxxx>
>> >
>> > commit 3057fcef385348fe85173f1b0c824d89f1176f72 upstream.
>> >
>> > NAND chips require a bit of time to take the NAND operation into
>> > account and set the BUSY bit in the STATUS reg. Make sure we don't poll
>> > the STATUS reg too early in nand_soft_waitrdy().
>> >
>> > Fixes: 8878b126df76 ("mtd: nand: add ->exec_op() implementation")
>> > Cc: <stable@xxxxxxxxxxxxxxx>
>> > Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxx>
>> > Acked-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
>> > Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
>> >
>> > ---
>> > drivers/mtd/nand/nand_base.c | 5 +++++
>> > 1 file changed, 5 insertions(+)
>> >
>> > --- a/drivers/mtd/nand/nand_base.c
>> > +++ b/drivers/mtd/nand/nand_base.c
>> > @@ -707,12 +707,17 @@ static void nand_wait_status_ready(struc
>> > */
>> > int nand_soft_waitrdy(struct nand_chip *chip, unsigned long timeout_ms)
>> > {
>> > + const struct nand_sdr_timings *timings;
>> > u8 status = 0;
>> > int ret;
>> >
>> > if (!chip->exec_op)
>> > return -ENOTSUPP;
>> >
>> > + /* Wait tWB before polling the STATUS reg. */
>> > + timings = nand_get_sdr_timings(&chip->data_interface);
>> > + ndelay(PSEC_TO_NSEC(timings->tWB_max));
>> > +
>> > ret = nand_status_op(chip, NULL);
>> > if (ret)
>> > return ret;
>> >
>> >
>>
>>
>> kbuild test robot via vger.kernel.org
>> Attachments1:36 PM (19 hours ago)
>> to Boris, kbuild-all, linux-kernel
>> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>> master
>> head: ccda3c4b77777f66aeb3c531352bb40d59501c59
>> commit: 3057fcef385348fe85173f1b0c824d89f1176f72 mtd: rawnand: Make
>> sure we wait tWB before polling the STATUS reg
>> date: 3 days ago
>> config: m68k-allyesconfig (attached as .config)
>> compiler: m68k-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
>> reproduce:
>> wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross
>> -O ~/bin/make.cross
>> chmod +x ~/bin/make.cross
>> git checkout 3057fcef385348fe85173f1b0c824d89f1176f72
>> # save the attached .config to linux build tree
>> make.cross ARCH=m68k
>>
>> All errors (new ones prefixed by >>):
>>
>> drivers/mtd/nand/raw/nand_base.o: In function `nand_soft_waitrdy':
>> >> nand_base.c:(.text+0x1022): undefined reference to `__udivdi3'
>
> Ugh. Does this also happen in Linus's tree?
Unfortunately yes, this is torvalds/linux.git, cfr. "tree" above.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
