mirror of https://gitee.com/openkylin/linux.git
e93a977367
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@google.com> Tested-by: Alexander Sverdlin <alexander.sverdlin@gmail.com> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Link: https://lore.kernel.org/r/20200610224652.64336-1-luisalberto@google.com Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> |
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| .. | ||
| controllers | ||
| Kconfig | ||
| Makefile | ||
| atmel.c | ||
| catalyst.c | ||
| core.c | ||
| core.h | ||
| eon.c | ||
| esmt.c | ||
| everspin.c | ||
| fujitsu.c | ||
| gigadevice.c | ||
| intel.c | ||
| issi.c | ||
| macronix.c | ||
| micron-st.c | ||
| sfdp.c | ||
| sfdp.h | ||
| spansion.c | ||
| sst.c | ||
| winbond.c | ||
| xilinx.c | ||
| xmc.c | ||