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[PATCH] ide: actually honor drive's minimum PIO/DMA cycle times

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The function ide_timing_compute() fails to *actually* take drive's
specified minimum PIO/DMA cycle times into account -- when doing this, it
calls ide_timing_merge() on the 'struct ide_timing' argument which contains
garbage at the moment, and then ultimately destroys the read cycle time by
quantizing the ide_timing[] entry, instead of copying from that entry to
the argument structure, and only then doing a merge/quantize.

Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Sergei Shtylyov 2006-06-26 00:26:15 -07:00 committed by Linus Torvalds
parent 178184b609
commit 17c1033d33
1 changed files with 7 additions and 1 deletions
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8
drivers/ide/ide-timing.h
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@ -219,6 +219,12 @@ static int ide_timing_compute(ide_drive_t *drive, short speed, struct ide_timing
if (!(s = ide_timing_find_mode(speed)))
return -EINVAL;
/*
* Copy the timing from the table.
*/
*t = *s;
/*
* If the drive is an EIDE drive, it can tell us it needs extended
* PIO/MWDMA cycle timing.
@ -247,7 +253,7 @@ static int ide_timing_compute(ide_drive_t *drive, short speed, struct ide_timing
* Convert the timing to bus clock counts.
*/
ide_timing_quantize(s, t, T, UT);
ide_timing_quantize(t, t, T, UT);
/*
* Even in DMA/UDMA modes we still use PIO access for IDENTIFY, S.M.A.R.T