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| author |   Niklas Cassel <cassel@kernel.org> | 2025-02-21 02:54:23 +0100 |
|---|---|---|
| committer | Niklas Cassel <cassel@kernel.org> | 2025-02-21 18:28:22 +0100 |
| commit | 91ec84f8eaddbc93d7c62e363d68aeb7b89879c7 (patch) | |
| tree | 8493dc3b49aaef616c18b1ccb6e443e5e370aa71 /scripts/gdb/linux/utils.py | |
| parent | dt-bindings: ata: Convert fsl,pq-sata to YAML (diff) | |
| download | wireguard-linux-91ec84f8eaddbc93d7c62e363d68aeb7b89879c7.tar.xz wireguard-linux-91ec84f8eaddbc93d7c62e363d68aeb7b89879c7.zip | |
ata: libata-eh: Do not use ATAPI DMA for a device limited to PIO mode
atapi_eh_request_sense() currently uses ATAPI DMA if the SATA controller
has ATA_FLAG_PIO_DMA (PIO cmds via DMA) set.
However, ATA_FLAG_PIO_DMA is a flag that can be set by a low-level driver
on a port at initialization time, before any devices are scanned.
If a controller detects a connected device that only supports PIO, we set
the flag ATA_DFLAG_PIO.
Modify atapi_eh_request_sense() to not use ATAPI DMA if the connected
device only supports PIO.
Reported-by: Philip Pemberton <lists@philpem.me.uk>
Closes: https://lore.kernel.org/linux-ide/c6722ee8-5e21-4169-af59-cbbae9edc02f@philpem.me.uk/
Tested-by: Philip Pemberton <lists@philpem.me.uk>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20250221015422.20687-2-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Diffstat (limited to 'scripts/gdb/linux/utils.py')
0 files changed, 0 insertions, 0 deletions