Hi Greg,
On Mon, May 14, 2018 at 11:04 AM, Greg Kroah-Hartman gregkh@linuxfoundation.org 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@linuxfoundation.org wrote:
4.16-stable review patch. If anyone has any objections, please let me know.
From: Boris Brezillon boris.brezillon@bootlin.com
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@vger.kernel.org Signed-off-by: Boris Brezillon boris.brezillon@bootlin.com Acked-by: Miquel Raynal miquel.raynal@bootlin.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
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