Hi, On Fri, 31 Aug 2018 15:59:58 +0530 Yogesh Gaur wrote: > Add 'size' data variable in spi_device struct. > This is to save the size of the connected slave device. > > After slave device scan, spi_nor_scan, size being assigned to this > from MTD layer. > > SFDP read is being requested before completion of spi_nor_scan() > routine, thus populate device size before making read request > to the SPI controller. > > Signed-off-by: Yogesh Gaur <yogeshnarayan.g...@nxp.com> > --- > drivers/mtd/devices/m25p80.c | 6 ++++++ > drivers/mtd/spi-nor/spi-nor.c | 2 ++ > include/linux/spi/spi.h | 2 ++ > 3 files changed, 10 insertions(+) > > diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c > index fe260cc..6c7ad86 100644 > --- a/drivers/mtd/devices/m25p80.c > +++ b/drivers/mtd/devices/m25p80.c > @@ -124,6 +124,10 @@ static ssize_t m25p80_read(struct spi_nor *nor, loff_t > from, size_t len, > /* convert the dummy cycles to the number of bytes */ > op.dummy.nbytes = (nor->read_dummy * op.dummy.buswidth) / 8; > > + /* for case of SFDP header read commands, populate spi device size */ > + if (flash->spimem->spi->size == 0) > + flash->spimem->spi->size = nor->mtd.size; > + If the 'size' is an spimem specific variable it should be added to the spi_mem struct rather than the spi_device struct.
Lothar Waßmann
