From: Christian Beier <c...@shoutrlabs.com> SPI fast flash read only is supported on devices using 3-byte-addressing. As chips bigger than 16MB use 4-byte-addressing, reading fails with -EOPNOTSUPP.
This commit sets the fast flash read callback spi->master->spi_flash_read to NULL for chips that use 4-byte-addressing. Fixes https://bugs.openwrt.org/index.php?do=details&task_id=1376. Signed-off-by: Christian Beier <c...@shoutrlabs.com> --- ...-m25p80-disable-fast-flash-read-for-4b-addressing.patch | 14 ++++++++++++++ 1 file changed, 14 insertions(+) create mode 100644 target/linux/ar71xx/patches-4.9/415-mtd-m25p80-disable-fast-flash-read-for-4b-addressing.patch diff --git a/target/linux/ar71xx/patches-4.9/415-mtd-m25p80-disable-fast-flash-read-for-4b-addressing.patch b/target/linux/ar71xx/patches-4.9/415-mtd-m25p80-disable-fast-flash-read-for-4b-addressing.patch new file mode 100644 index 0000000000..048f50cbcd --- /dev/null +++ b/target/linux/ar71xx/patches-4.9/415-mtd-m25p80-disable-fast-flash-read-for-4b-addressing.patch @@ -0,0 +1,14 @@ +diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c +index 1343e5d..1e89067 100644 +--- a/drivers/mtd/devices/m25p80.c ++++ b/drivers/mtd/devices/m25p80.c +@@ -245,6 +245,9 @@ static int m25p_probe(struct spi_device *spi) + if (ret) + return ret; + ++ if (nor->addr_width > 3) ++ spi->master->spi_flash_read = NULL; ++ + return mtd_device_parse_register(&nor->mtd, + data ? data->part_probes : NULL, + &ppdata, -- 2.11.0 _______________________________________________ Lede-dev mailing list Lede-dev@lists.infradead.org http://lists.infradead.org/mailman/listinfo/lede-dev
