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authorFinn Thain <fthain@linux-m68k.org>2021-06-10 11:15:06 +1000
committerJens Axboe <axboe@kernel.dk>2021-06-10 16:30:11 -0600
commitcabd10be0b9e4bf043dc828321875b937b2aa7ca (patch)
tree701af3ad92e03ac7ee8bf666139d938cf09a829b /arch/m68k/q40
parent5c8121262484d99bffb598f39a0df445cecd8efb (diff)
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>
Diffstat (limited to 'arch/m68k/q40')
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