diff options
Diffstat (limited to 'tags/2.6.22-2/20006_fix-ide-cd-pio-mode.patch1')
| -rw-r--r-- | tags/2.6.22-2/20006_fix-ide-cd-pio-mode.patch1 | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/tags/2.6.22-2/20006_fix-ide-cd-pio-mode.patch1 b/tags/2.6.22-2/20006_fix-ide-cd-pio-mode.patch1 new file mode 100644 index 0000000..1ca415c --- /dev/null +++ b/tags/2.6.22-2/20006_fix-ide-cd-pio-mode.patch1 @@ -0,0 +1,36 @@ +Subject: Fix IDE CD-drive PIO mode. +From: http://xenbits.xensource.com/xen-3.1-testing.hg (tip 15042) +Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk> + +CD drives in PIO mode don't work under Xen because of a change in Linux +between 2.6.12 and 2.6.16, as a result of the following thread: +http://lists.parisc-linux.org/pipermail/parisc-linux/2005-August/027197.html + +The change breaks systems which have highmem and a swiotlb because the +ide-cd driver doesn't use the swiotlb, resulting in read/writes to/from +highmem pages in PIO mode not working any longer. Xen kernels usually have +both highmem and a swiotlb. + +Acked-by: Jan Beulich <jbeulich@novell.com> + +--- + drivers/ide/ide-lib.c | 8 ++++---- + 1 file changed, 4 insertions(+), 4 deletions(-) + +--- a/drivers/ide/ide-lib.c 2007-08-27 12:09:26.000000000 -0400 ++++ b/drivers/ide/ide-lib.c 2007-08-27 14:02:05.000000000 -0400 +@@ -341,10 +341,10 @@ void ide_toggle_bounce(ide_drive_t *driv + { + u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */ + +- if (!PCI_DMA_BUS_IS_PHYS) { +- addr = BLK_BOUNCE_ANY; +- } else if (on && drive->media == ide_disk) { +- if (HWIF(drive)->pci_dev) ++ if (on && drive->media == ide_disk) { ++ if (!PCI_DMA_BUS_IS_PHYS) ++ addr = BLK_BOUNCE_ANY; ++ else if (HWIF(drive)->pci_dev) + addr = HWIF(drive)->pci_dev->dma_mask; + } + |