Messages in this thread | | | Date | Tue, 16 Apr 2002 09:33:00 +0200 | From | Martin Dalecki <> | Subject | Re: [PATCH] 2.5.8 IDE 36 |
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Vojtech Pavlik wrote: > On Tue, Apr 16, 2002 at 09:05:21AM +0200, Martin Dalecki wrote: > >>Tue Apr 16 01:02:47 CEST 2002 ide-clean-36 >> >>- Consolidate ide_choose_drive() and choose_drive() in to one function. >> >>- Remove sector data byteswpapping support. Byte-swapping the data is supported >> on the file-system level where applicable. Byte-swapped interfaces are >> supported on a lower level anyway. And finally it was used inconsistently. > > > Are you sure about this? I think file systems support LE/BE, but not > byteswapping because of IDE being LE on a BE system.
I'm sure about this. For the following reasons:
1. The removed functionality affected only sector data transfers.
2. The following code for interfaces with byte swapped BUS setups still remains intact:
#if defined(CONFIG_ATARI) || defined(CONFIG_Q40) if (MACH_IS_ATARI || MACH_IS_Q40) { /* Atari has a byte-swapped IDE interface */ insw_swapw(IDE_DATA_REG, buffer, bytecount / 2); return; } #endif
And indeed as you show - there was confusion about this issue throughout the whole driver, since the taskfile_in(out) functions where basically just the byteswapped variants and where not uses consistently.
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