ata: libata-eh: Do not use ATAPI DMA for a device limited to PIO mode
[ Upstream commit 91ec84f8eaddbc93d7c62e363d68aeb7b89879c7 ] 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> Signed-off-by:
Sasha Levin <sashal@kernel.org>
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