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| author | Roger Quadros <rogerq@ti.com> | 2015-02-23 16:26:39 +0100 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2015-03-31 02:39:15 +0200 |
| commit | 60c70d66cdd39eb560bba5a95c429bf2ad5294d0 (patch) | |
| tree | 52eb33f58905f89256ebd8836ff25af072b65f16 /fs/jffs2 | |
| parent | mtd: spi-nor: factor out replace-able flash_{lock,unlock} (diff) | |
| download | linux-60c70d66cdd39eb560bba5a95c429bf2ad5294d0.tar.xz linux-60c70d66cdd39eb560bba5a95c429bf2ad5294d0.zip | |
mtd: nand: Prevent possible kernel lockup in nand_command()
If a NAND device is not really present or pin muxes are not correctly
configured we can lock up the kernel waiting infinitely for NAND_STATUS
to be ready.
This can be easily reproduced on TI's DRA7-evm board by booting it
without NAND support in u-boot and disabling NAND pin muxes in the kernel.
Add timeout when waiting for NAND_CMD_RESET completion. As per ONFi v4.0
tRST can be upto 250ms for EZ-NAND and 5ms for raw NAND.
Signed-off-by: Roger Quadros <rogerq@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'fs/jffs2')
0 files changed, 0 insertions, 0 deletions