ata: pata_parport: add custom version of wait_after_reset

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Some parallel adapters (e.g. EXP Computer MC-1285B EPP Cable) return
bogus values when there's no master device present. This can cause
reset to fail, preventing the lone slave device (such as EXP Computer
CD-865) from working.

Add custom version of wait_after_reset that ignores master failure when
a slave device is present. The custom version is also needed because
the generic ata_sff_wait_after_reset uses direct port I/O for slave
device detection.

Signed-off-by: Ondrej Zary <linux@zary.sk>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>

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Ondrej Zary 2023-10-05 22:55:58 +02:00 • committed by Damien Le Moal

parent d2302427c1

commit f343e578fe

1 changed files with 67 additions and 1 deletions

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drivers/ata/pata_parport/pata_parport.c

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