Bug#270194: kernel-image-2.6.7-1-686: dose not detect SATA on DELL 750 without CDROM
Package: kernel-image-2.6.7-1-686
Version: 2.6.7-2
Severity: important
Tags: patch
In a Dell PowerEdge 750, the SATA harddisk cannot be recognized by the
kernel (causing a kernel panic) if the cdrom drive is removed.
If the cdrom drive is put back, everything works fine!!!
These are the output before the kernel panic:
VFS: Mounted root (ext2 filesystem).
Red Hat nash version 3.5.21 starting
SCSI subsystem initialized
ata_piix: combined mode detected
ACPI: No IRQ known for interrupt pin A of device 0000:00:1f.2
ata1: PATA max UDMA/33 cdm 0x1F0 ctl 0x3F6 bmdma 0xFEA0 irq 14
ata1: port disabled. ignoring.
scsi0: ata_piix
Using cfq io scheduler
ata2: SATA max UDMA/133 cdm 0x170 ctl 0x376 bmdma 0xFEA8 irq 15
ata2: port disabled. ignoring.
scsi1 : ata_piix
VFS: Cannot open root device "LABEL=/" or unknown-block(0,0)
Please append a correct "root=" boot option
Kernel panic: VFS: Unable to mount root fs on unknown-block(0,0)
2.4 and 2.6 have same problem.
then i find a patch for 2.4 kernel in dell:
http://linux.dell.com/blog/contributions
http://linux.dell.com/files/patches/sata/ata_piix.c.patch
and i also make a patch for 2.6 kernel:
*** ata_piix.c.orig Mon Sep 6 22:25:32 2004
--- ata_piix.c Mon Sep 6 22:25:43 2004
***************
*** 272,279 ****
static void piix_pata_phy_reset(struct ata_port *ap)
{
if (!pci_test_config_bits(ap->host_set->pdev,
! &piix_enable_bits[ap->port_no])) {
ata_port_disable(ap);
printk(KERN_INFO "ata%u: port disabled. ignoring.\n", ap->id);
return;
--- 272,290 ----
static void piix_pata_phy_reset(struct ata_port *ap)
{
+ unsigned int controller;
+
+ /* In combined legacy mode, port number is not the same
+ * as primary/secondary controller!
+ */
+ switch (ap->ioaddr.cmd_addr) {
+ case 0x1f0: controller = 0; break;
+ case 0x170: controller = 1; break;
+ default: controller = ap->port_no;
+ }
+
if (!pci_test_config_bits(ap->host_set->pdev,
! &piix_enable_bits[controller])) {
ata_port_disable(ap);
printk(KERN_INFO "ata%u: port disabled. ignoring.\n", ap->id);
return;
all works fine.
-- System Information:
Debian Release: 3.1
APT prefers testing
APT policy: (500, 'testing')
Architecture: i386 (i686)
Kernel: Linux 2.6.8
Locale: LANG=C, LC_CTYPE=C
Versions of packages kernel-image-2.6.7-1-686 depends on:
ii coreutils [fileutils] 5.2.1-2 The GNU core utilities
ii initrd-tools 0.1.74 tools to create initrd image for p
ii module-init-tools 3.1-pre5-6 tools for managing Linux kernel mo
-- no debconf information
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