Re: [PATCH] atiixp: missing parentheses?

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I wrote:

This looks odd, is below what was intended? note that timing_shift can
only be 16, 8 or 0. Maybe intended was 24, 16, 8 or 0? then we should do:

   Looking at the libata driver, yes, it should be 0, 8, 16, and 24.

int timing_shift = ((drive->dn & 2) ? 16 : 0) + ((drive->dn & 1) ? 0 : 8); --------------------------->8-------------8<------------------------------
Add missing parentheses


Signed-off-by: Roel Kluin <roel.kluin@xxxxxxxxx>


diff --git a/drivers/ide/atiixp.c b/drivers/ide/atiixp.c
index b2735d2..b7813ec 100644
--- a/drivers/ide/atiixp.c
+++ b/drivers/ide/atiixp.c
@@ -52,7 +52,7 @@ static void atiixp_set_pio_mode(ide_drive_t *drive, const u8 pio)
 {
     struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
     unsigned long flags;
- int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8; + int timing_shift = (drive->dn & 2) ? 16 : 0 + ((drive->dn & 1) ? 0 : 8);
     u32 pio_timing_data;
     u16 pio_mode_data;
@@ -85,7 +85,7 @@ static void atiixp_set_dma_mode(ide_drive_t *drive, const u8 speed)
 {
     struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
     unsigned long flags;
- int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8; + int timing_shift = (drive->dn & 2) ? 16 : 0 + ((drive->dn & 1) ? 0 : 8);
     u32 tmp32;
     u16 tmp16;
     u16 udma_ctl = 0;


Why didn't you add parens around the first ?: then? They are surely needed. Though this clearly needs to be simplified to (drive->dn * 8).

   Oh, actually, timing_shift = (drive->dn ^ 1) * 8.

MBR, Sergei
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