linux-stable/arch/m68k/mac
Finn Thain cabd10be0b m68k/mac: Replace macide driver with generic platform drivers
This allows m68k mac systems to switch from the deprecated IDE subsystem
to libata.

This was tested on my Quadra 630. I haven't tested it on my PowerBook 150
because I don't have a RAM adapter board for it. It appears that the
hardware I tested doesn't need macide_clear_irq() or macide_test_irq().
If it did, the generic driver would not have worked. It's possible that
those routines are needed for the PowerBook 150 but we can cross that
bridge if and when we come to it.

BTW, macide_clear_irq() appears to suffer from a race condition. The write
to the interrupt flags register could have unintended side effects as it
may alter other flag bits. Fortunately, all of the other bits are unused
by Linux. When tested on my Quadra 630, the assignment *ide_ifr &= ~0x20
was observed to have no effect on bit 5, so it may be redundant anyway.

Cc: Michael Schmitz <schmitzmic@gmail.com>
Cc: Joshua Thompson <funaho@jurai.org>
Reviewed-by: Michael Schmitz <schmitzmic@gmail.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Finn Thain <fthain@linux-m68k.org>
Link: https://lore.kernel.org/r/11a56b3317df3bb2ddc15fd29b40b6820e9c7444.1623287706.git.fthain@linux-m68k.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-06-10 16:30:11 -06:00
..
baboon.c m68k/mac: Fix apparent race condition in Baboon interrupt dispatch 2018-03-19 10:22:59 +01:00
config.c m68k/mac: Replace macide driver with generic platform drivers 2021-06-10 16:30:11 -06:00
iop.c m68k: mac: Refactor iop_preinit() and iop_init() 2020-11-23 11:30:51 +01:00
mac_penguin.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
macboing.c m68k: Replace HTTP links with HTTPS ones 2020-09-07 10:56:08 +02:00
macints.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
misc.c Char/Misc driver patches for 5.1-rc1 2019-03-06 14:18:59 -08:00
oss.c m68k/mac: Fix race conditions in OSS interrupt dispatch 2018-01-16 16:52:17 +01:00
psc.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
via.c asm-generic: cross-architecture timer cleanup 2020-12-16 00:07:17 -08:00