Bartlomiej Zolnierkiewicz wrote:
It results in ~6% decrease in the driver LOC count and also ~1%
decrease in the driver binary size (as measured on x86-32).
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
---
drivers/ata/pata_radisys.c | 66 +++++++++++++++++----------------------------
1 file changed, 25 insertions(+), 41 deletions(-)
Index: b/drivers/ata/pata_radisys.c
===================================================================
--- a/drivers/ata/pata_radisys.c
+++ b/drivers/ata/pata_radisys.c
@@ -26,20 +26,9 @@
#define DRV_NAME "pata_radisys"
#define DRV_VERSION "0.4.4"
-/**
- * radisys_set_piomode - Initialize host controller PATA PIO timings
- * @ap: ATA port
- * @adev: Device whose timings we are configuring
- *
- * Set PIO mode for device, in host controller PCI config space.
- *
- * LOCKING:
- * None (inherited from caller).
- */
-
-static void radisys_set_piomode (struct ata_port *ap, struct ata_device *adev)
+static void radisys_set_timings(struct ata_port *ap, struct ata_device *adev,
+ u8 pio, bool use_mwdma)
{
- unsigned int pio = adev->pio_mode - XFER_PIO_0;
struct pci_dev *dev = to_pci_dev(ap->host->dev);
u16 idetm_data;
int control = 0;
@@ -52,7 +41,7 @@ static void radisys_set_piomode (struct
*/
static const /* ISP RTC */
- u8 timings[][2] = { { 0, 0 }, /* Check me */
+ u8 timings[][2] = { { 0, 0 },
{ 0, 0 },
{ 1, 1 },
{ 2, 2 },
@@ -62,6 +51,10 @@ static void radisys_set_piomode (struct
control |= 1; /* TIME1 enable */
if (ata_pio_need_iordy(adev))
control |= 2; /* IE IORDY */
+ /* If the drive MWDMA is faster than it can do PIO then
+ we must force PIO0 for PIO cycles. */
Multi-line comment style should preferrably be:
/*
* blah
* blah
*/
+ if (use_mwdma && adev->pio_mode < (XFER_PIO_0 + pio))
+ control = 1;
Hm, shouldn't that be 8?
@@ -115,20 +112,8 @@ static void radisys_set_dmamode (struct
XFER_PIO_0, XFER_PIO_3, XFER_PIO_4
};
int pio = needed_pio[mwdma] - XFER_PIO_0;
- int control = 3; /* IORDY|TIME0 */
-
- /* If the drive MWDMA is faster than it can do PIO then
- we must force PIO0 for PIO cycles. */
-
- if (adev->pio_mode < needed_pio[mwdma])
- control = 1;
Perhaps there's a bug here?
MBR, Sergei
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