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authorSergei Shtylyov <sshtylyov@ru.mvista.com>2006-06-26 00:26:15 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-26 09:58:27 -0700
commit17c1033d331a430ce631805e15215e63b4cce764 (patch)
tree3ec734f17ecc4a77116388947e8ee96426ee2d01 /drivers/ide
parent178184b60979992508130741f16499c360bc9c9a (diff)
[PATCH] ide: actually honor drive's minimum PIO/DMA cycle times
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>
Diffstat (limited to 'drivers/ide')
-rw-r--r--drivers/ide/ide-timing.h8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/ide/ide-timing.h b/drivers/ide/ide-timing.h
index 2fcfac6e967..c0864b1e922 100644
--- a/drivers/ide/ide-timing.h
+++ b/drivers/ide/ide-timing.h
@@ -220,6 +220,12 @@ static int ide_timing_compute(ide_drive_t *drive, short speed, struct ide_timing
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