On Wed, Aug 6, 2008 at 1:34 PM, Sergei Shtylyov [off-list ref] wrote:

Hello.

Borislav Petkov wrote:

quoted

From: Borislav Petkov <redacted>
Date: Sun, 3 Aug 2008 18:46:35 +0200
Subject: [PATCH] ide-generic: handle probing of legacy io-ports v4

Avoid probing the io-ports in case an IDE PCI controller is present and it
uses
the legacy iobases. If we still want to enforce the probing, we do

ide_generic.probe_mask=0x3f

on the kernel command line. The iobase checking code is adapted from
drivers/ata/pata_legacy.c after converting hex pci ids into their
corresponding
macros in <linux/pci_ids.h>.

CC: Sergei Shtylyov <redacted>
Signed-off-by: Borislav Petkov <redacted>

Acked-by: Sergei Shtylyov <redacted>

quoted

diff --git a/drivers/ide/ide-generic.c b/drivers/ide/ide-generic.c
index 8fe8b5b..efce159 100644
--- a/drivers/ide/ide-generic.c
+++ b/drivers/ide/ide-generic.c

[...]

quoted

@@ -100,19 +101,69 @@ static const u16 legacy_bases[] = { 0x1f0, 0x170,

0x1e8, 0x168, 0x1e0, 0x160 };
 static const int legacy_irqs[]  = { 14, 15, 11, 10, 8, 12 };
 #endif
 +static void ide_generic_check_pci_legacy_iobases(int *primary, int
*secondary)
+{
+       struct pci_dev *p = NULL;
+       u16 val;
+
+       for_each_pci_dev(p) {
+               int r;
+
+               for (r = 0; r < 6; r++) {
+                       if (pci_resource_start(p, r) == 0x1f0)
+                               *primary = 1;
+                       if (pci_resource_start(p, r) == 0x170)
+                               *secondary = 1;
+               }

 Would have been probably enough to test only BAR0/2, don't you think?

I assume you're referring to the legacy ioports fixup in
drivers/pci/probe.c:pci_setup_device(). Yes, there's no need to go all the way
to BAR5 since those are guaranteed unused in compatibility mode, so actually the
loop should go till 4. Bart, can you please change that when applying?

-- 
Regards/Gruß,
Boris