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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-10-11 23:54:01 +0200
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-10-11 23:54:01 +0200
commita6fe837ed63aa812bea029a24b7aafc72ba8de88 (patch)
tree7f13ed5e930ec8a782c7c412ce4d0cab82e21872 /drivers
parentffe5415c3d6138aff412af7e455b3df4d53c0aa0 (diff)
alim15x3: PIO mode setup fixes
* Return failure in ->speedproc method for unsupported/invalid transfer modes passed from user-space (fixes theoretical OOPS in ali_tune_pio() and/or setting random PIO timings on host controller + disabling UDMA bit + setting unsupported/invalid transfer mode on the device). * Don't disable UDMA bit when programming PIO modes. * Add FIXME about DMA timings never being set. * Bump driver version. Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/ide/pci/alim15x3.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/ide/pci/alim15x3.c b/drivers/ide/pci/alim15x3.c
index 005402ab748b..f15c8879d2c1 100644
--- a/drivers/ide/pci/alim15x3.c
+++ b/drivers/ide/pci/alim15x3.c
@@ -1,5 +1,5 @@
/*
- * linux/drivers/ide/pci/alim15x3.c Version 0.25 Jun 9 2007
+ * linux/drivers/ide/pci/alim15x3.c Version 0.26 Jul 14 2007
*
* Copyright (C) 1998-2000 Michel Aubry, Maintainer
* Copyright (C) 1998-2000 Andrzej Krzysztofowicz, Maintainer
@@ -418,6 +418,14 @@ static int ali15x3_tune_chipset(ide_drive_t *drive, const u8 speed)
u8 tmpbyte = 0x00;
int m5229_udma = (hwif->channel) ? 0x57 : 0x56;
+ if (speed < XFER_PIO_0)
+ return 1;
+
+ if (speed >= XFER_PIO_0 && speed <= XFER_PIO_5) {
+ ali_tune_pio(drive, speed - XFER_PIO_0);
+ return ide_config_drive_speed(drive, speed);
+ }
+
if (speed == XFER_UDMA_6)
speed1 = 0x47;
@@ -430,8 +438,9 @@ static int ali15x3_tune_chipset(ide_drive_t *drive, const u8 speed)
tmpbyte &= ultra_enable;
pci_write_config_byte(dev, m5229_udma, tmpbyte);
- if (speed < XFER_SW_DMA_0)
- ali_tune_pio(drive, speed - XFER_PIO_0);
+ /*
+ * FIXME: Oh, my... DMA timings are never set.
+ */
} else {
pci_read_config_byte(dev, m5229_udma, &tmpbyte);
tmpbyte &= (0x0f << ((1-unit) << 2));