diff options
| author | Timo Sigurdsson <[email protected]> | 2021-06-14 09:25:39 +0200 |
|---|---|---|
| committer | Jens Axboe <[email protected]> | 2021-06-14 08:26:54 -0600 |
| commit | f6bca4d91b2ea052e917cca3f9d866b5cc1d500a (patch) | |
| tree | 8a7b22d656732661e690e5a24601d2d976db647e /tools/perf/scripts/python/bin/stackcollapse-report | |
| parent | 44b1fbc0f5f30e66a56d29575349f0b1ebe2b0ee (diff) | |
ata: ahci_sunxi: Disable DIPM
DIPM is unsupported or broken on sunxi. Trying to enable the power
management policy med_power_with_dipm on an Allwinner A20 SoC based board
leads to immediate I/O errors and the attached SATA disk disappears from
the /dev filesystem. A reset (power cycle) is required to make the SATA
controller or disk work again. The A10 and A20 SoC data sheets and manuals
don't mention DIPM at all [1], so it's fair to assume that it's simply not
supported. But even if it was, it should be considered broken and best be
disabled in the ahci_sunxi driver.
[1] https://github.com/allwinner-zh/documents/tree/master/
Fixes: c5754b5220f0 ("ARM: sunxi: Add support for Allwinner SUNXi SoCs sata to ahci_platform")
Cc: [email protected]
Signed-off-by: Timo Sigurdsson <[email protected]>
Tested-by: Timo Sigurdsson <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/bin/stackcollapse-report')
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