lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[PATCH] ide-cd: Handle strange interrupt on the Intel ESB2

Browse Source 
The ESB2 appears to emit spurious DMA interrupts when configured for native
mode and handling ATAPI devices.  Stratus were able to pin this bug down and
produce a patch.  This is a rework which applies the fixup only to the ESB2
(for now).  We can apply it to other chips later if the same problem is found.

This code has been tested and confirmed to fix the problem on the tested
systems.

Signed-off-by: Alan Cox <alan@redhat.com>
(Most of the hard work done by Stratus however)
Cc: Jens Axboe <axboe@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Alan Cox
2006-12-10 02:20:39 -08:00
committed by Linus Torvalds
parent 33859f7f97
commit ee2f344b33
3 changed files with 12 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/ide/pci/piix.c
View File

@@ -505,6 +505,10 @@ static void __devinit init_hwif_piix(ide_hwif_t *hwif)
/* This is a painful system best to let it self tune for now */
return;
}
/* ESB2 appears to generate spurious DMA interrupts in PIO mode
when in native mode */
if (hwif->pci_dev->device == PCI_DEVICE_ID_INTEL_ESB2_18)
hwif->atapi_irq_bogon = 1;
hwif->autodma = 0;
hwif->tuneproc = &piix_tune_drive;