This change reverts aba3a882a178: "mtd: spi-nor: intel: provide a range for poll_timout". That change introduces a performance regression when reading sequentially from flash. Logging calls to intel_spi_read without this change we get: Start MTD read [ 20.045527] intel_spi_read(from=1800000, len=400000) [ 20.045527] intel_spi_read(from=1800000, len=400000) [ 282.199274] intel_spi_read(from=1c00000, len=400000) [ 282.199274] intel_spi_read(from=1c00000, len=400000) [ 544.351528] intel_spi_read(from=2000000, len=400000) [ 544.351528] intel_spi_read(from=2000000, len=400000) End MTD read With this change: Start MTD read [ 21.942922] intel_spi_read(from=1c00000, len=400000) [ 21.942922] intel_spi_read(from=1c00000, len=400000) [ 23.784058] intel_spi_read(from=2000000, len=400000) [ 23.784058] intel_spi_read(from=2000000, len=400000) [ 25.625006] intel_spi_read(from=2400000, len=400000) [ 25.625006] intel_spi_read(from=2400000, len=400000) End MTD read Signed-off-by: Luis Alberto Herrera <luisalberto@xxxxxxxxxx> --- drivers/mtd/spi-nor/controllers/intel-spi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/mtd/spi-nor/controllers/intel-spi.c b/drivers/mtd/spi-nor/controllers/intel-spi.c index 61d2a0ad2131..2b89361a0d3a 100644 --- a/drivers/mtd/spi-nor/controllers/intel-spi.c +++ b/drivers/mtd/spi-nor/controllers/intel-spi.c @@ -292,7 +292,7 @@ static int intel_spi_wait_hw_busy(struct intel_spi *ispi) u32 val; return readl_poll_timeout(ispi->base + HSFSTS_CTL, val, - !(val & HSFSTS_CTL_SCIP), 40, + !(val & HSFSTS_CTL_SCIP), 0, INTEL_SPI_TIMEOUT * 1000); } @@ -301,7 +301,7 @@ static int intel_spi_wait_sw_busy(struct intel_spi *ispi) u32 val; return readl_poll_timeout(ispi->sregs + SSFSTS_CTL, val, - !(val & SSFSTS_CTL_SCIP), 40, + !(val & SSFSTS_CTL_SCIP), 0, INTEL_SPI_TIMEOUT * 1000); } -- 2.27.0.278.ge193c7cf3a9-goog ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/