target/linux/ar71xx/patches-3.14/464-spi-ath79-fix-fast-flash-read.patch

   1 --- a/drivers/mtd/devices/m25p80.c
   2 +++ b/drivers/mtd/devices/m25p80.c
   3 @@ -530,6 +530,8 @@ static int m25p80_read(struct mtd_info *
   4         if (dummy < 0) {
   5                 dev_err(&flash->spi->dev, "No valid read command supported\n");
   6                 return -EINVAL;
   7 +       } else if (dummy == 1) {
   8 +               t[0].dummy = true;
   9         }
  10
  11         t[0].type = SPI_TRANSFER_FLASH_READ_CMD;
  12 --- a/drivers/spi/spi-ath79.c
  13 +++ b/drivers/spi/spi-ath79.c
  14 @@ -262,6 +262,10 @@ static int ath79_spi_do_read_flash_cmd(s
  15         sp->read_addr = 0;
  16
  17         len = t->len - 1;
  18 +
  19 +       if (t->dummy)
  20 +               len -= 1;
  21 +
  22         p = t->tx_buf;
  23
  24         while (len--) {
  25 --- a/include/linux/spi/spi.h
  26 +++ b/include/linux/spi/spi.h
  27 @@ -598,6 +598,7 @@ struct spi_transfer {
  28         u16             delay_usecs;
  29         u32             speed_hz;
  30         enum spi_transfer_type type;
  31 +       bool dummy;
  32
  33         struct list_head transfer_list;
  34  };