Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=aa8f2371c564fc9b289dab3a8ecd93212d021fd2
Commit:     aa8f2371c564fc9b289dab3a8ecd93212d021fd2
Parent:     5db501d7e398c6a838a307adf0347cf6a2b015a3
Author:     Alan Cox <[EMAIL PROTECTED]>
AuthorDate: Sat Jan 19 15:51:26 2008 +0000
Committer:  Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Sat Jan 19 21:29:39 2008 -0800

    pata_pdc202xx_old: Fix crashes with ATAPI
    
    The PDC202xx older devices do not support ATAPI DMA via the usual
    interfaces. What documentation I have isn't sufficient to support DMA and
    it isn't clear if the Windows drivers do this or it is possible at all.
    (Neither do the drivers/ide old drivers)
    
    So turn it ATAPI DMA off, these are disk optimised controllers.
    
    Signed-off-by: Alan Cox <[EMAIL PROTECTED]>
    Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
 drivers/ata/pata_pdc202xx_old.c |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/drivers/ata/pata_pdc202xx_old.c b/drivers/ata/pata_pdc202xx_old.c
index 8f28156..6c9689b 100644
--- a/drivers/ata/pata_pdc202xx_old.c
+++ b/drivers/ata/pata_pdc202xx_old.c
@@ -244,6 +244,24 @@ static int pdc2026x_port_start(struct ata_port *ap)
        return ata_sff_port_start(ap);
 }
 
+/**
+ *     pdc2026x_check_atapi_dma - Check whether ATAPI DMA can be supported for 
this command
+ *     @qc: Metadata associated with taskfile to check
+ *
+ *     Just say no - not supported on older Promise.
+ *
+ *     LOCKING:
+ *     None (inherited from caller).
+ *
+ *     RETURNS: 0 when ATAPI DMA can be used
+ *              1 otherwise
+ */
+
+static int pdc2026x_check_atapi_dma(struct ata_queued_cmd *qc)
+{
+       return 1;
+}
+
 static struct scsi_host_template pdc202xx_sht = {
        .module                 = THIS_MODULE,
        .name                   = DRV_NAME,
@@ -311,6 +329,7 @@ static struct ata_port_operations pdc2026x_port_ops = {
        .post_internal_cmd = ata_bmdma_post_internal_cmd,
        .cable_detect   = pdc2026x_cable_detect,
 
+       .check_atapi_dma= pdc2026x_check_atapi_dma,
        .bmdma_setup    = ata_bmdma_setup,
        .bmdma_start    = pdc2026x_bmdma_start,
        .bmdma_stop     = pdc2026x_bmdma_stop,
-
To unsubscribe from this list: send the line "unsubscribe git-commits-head" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Reply via email to