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authorSergei Shtylyov <sshtylyov@ru.mvista.com>2006-12-13 00:35:53 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-13 09:05:55 -0800
commitf13c152684a7f99ead26525270ed3e28a1d2467f (patch)
treed4c89c1870f761ce7df3505bbe74b363856bac16
parent26c068daf089aa21844236c97d05049b9497cc0a (diff)
downloadleg-kernel-f13c152684a7f99ead26525270ed3e28a1d2467f.tar.gz
[PATCH] HPT37x: read f_CNT saved by BIOS from port
The undocumented register BIOS uses for saving f_CNT seems to only be mapped to I/O space while all the other HPT3xx regs are dual-mapped. Looks like another HighPoint's dirty trick. With this patch, the deadly kernel oops on the cards having the modern HighPoint BIOSes is now at last gone! Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Cc: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--drivers/ide/pci/hpt366.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/ide/pci/hpt366.c b/drivers/ide/pci/hpt366.c
index 9fd50801d382..08119da06d54 100644
--- a/drivers/ide/pci/hpt366.c
+++ b/drivers/ide/pci/hpt366.c
@@ -1035,14 +1035,14 @@ static void __devinit hpt37x_clocking(ide_hwif_t *hwif)
* First try reading the register in which the HighPoint BIOS
* saves f_CNT value before reprogramming the DPLL from its
* default setting (which differs for the various chips).
+ * NOTE: This register is only accessible via I/O space.
+ *
* In case the signature check fails, we'll have to resort to
* reading the f_CNT register itself in hopes that nobody has
* touched the DPLL yet...
*/
- pci_read_config_dword(dev, 0x70, &temp);
+ temp = inl(pci_resource_start(dev, 4) + 0x90);
if ((temp & 0xFFFFF000) != 0xABCDE000) {
- int i;
-
printk(KERN_WARNING "HPT37X: no clock data saved by BIOS\n");
/* Calculate the average value of f_CNT */