Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=6c5f8cc33eb2e10b6ab788bbe259fc142a068627
Commit:     6c5f8cc33eb2e10b6ab788bbe259fc142a068627
Parent:     406c9b605cbc45151c03ac9a3f95e9acf050808c
Author:     Alan <[EMAIL PROTECTED]>
AuthorDate: Fri Jan 5 16:36:27 2007 -0800
Committer:  Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Fri Jan 5 23:55:22 2007 -0800

    [PATCH] atiixp: Old drivers/ide layer driver for the ATIIXP hang fix
    
    When the old IDE layer calls into methods in the driver during error
    handling it is essentially random whether ide_lock is already held.  This
    causes a deadlock in the atiixp driver which also uses ide_lock internally
    for locking.
    
    Switch to a private lock instead.
    
    [EMAIL PROTECTED]: cleanup]
    Signed-off-by: Alan Cox <[EMAIL PROTECTED]>
    Acked-by: Bartlomiej Zolnierkiewicz <[EMAIL PROTECTED]>
    Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
    Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
 drivers/ide/pci/atiixp.c |   18 ++++++++++--------
 1 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/ide/pci/atiixp.c b/drivers/ide/pci/atiixp.c
index ffdffb6..524e65d 100644
--- a/drivers/ide/pci/atiixp.c
+++ b/drivers/ide/pci/atiixp.c
@@ -46,6 +46,8 @@ static atiixp_ide_timing mdma_timing[] = {
 
 static int save_mdma_mode[4];
 
+static DEFINE_SPINLOCK(atiixp_lock);
+
 /**
  *     atiixp_ratemask         -       compute rate mask for ATIIXP IDE
  *     @drive: IDE drive to compute for
@@ -105,7 +107,7 @@ static int atiixp_ide_dma_host_on(ide_drive_t *drive)
        unsigned long flags;
        u16 tmp16;
 
-       spin_lock_irqsave(&ide_lock, flags);
+       spin_lock_irqsave(&atiixp_lock, flags);
 
        pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
        if (save_mdma_mode[drive->dn])
@@ -114,7 +116,7 @@ static int atiixp_ide_dma_host_on(ide_drive_t *drive)
                tmp16 |= (1 << drive->dn);
        pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
 
-       spin_unlock_irqrestore(&ide_lock, flags);
+       spin_unlock_irqrestore(&atiixp_lock, flags);
 
        return __ide_dma_host_on(drive);
 }
@@ -125,13 +127,13 @@ static int atiixp_ide_dma_host_off(ide_drive_t *drive)
        unsigned long flags;
        u16 tmp16;
 
-       spin_lock_irqsave(&ide_lock, flags);
+       spin_lock_irqsave(&atiixp_lock, flags);
 
        pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
        tmp16 &= ~(1 << drive->dn);
        pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
 
-       spin_unlock_irqrestore(&ide_lock, flags);
+       spin_unlock_irqrestore(&atiixp_lock, flags);
 
        return __ide_dma_host_off(drive);
 }
@@ -152,7 +154,7 @@ static void atiixp_tuneproc(ide_drive_t *drive, u8 pio)
        u32 pio_timing_data;
        u16 pio_mode_data;
 
-       spin_lock_irqsave(&ide_lock, flags);
+       spin_lock_irqsave(&atiixp_lock, flags);
 
        pci_read_config_word(dev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
        pio_mode_data &= ~(0x07 << (drive->dn * 4));
@@ -165,7 +167,7 @@ static void atiixp_tuneproc(ide_drive_t *drive, u8 pio)
                 (pio_timing[pio].command_width << (timing_shift + 4));
        pci_write_config_dword(dev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
 
-       spin_unlock_irqrestore(&ide_lock, flags);
+       spin_unlock_irqrestore(&atiixp_lock, flags);
 }
 
 /**
@@ -189,7 +191,7 @@ static int atiixp_speedproc(ide_drive_t *drive, u8 
xferspeed)
 
        speed = ide_rate_filter(atiixp_ratemask(drive), xferspeed);
 
-       spin_lock_irqsave(&ide_lock, flags);
+       spin_lock_irqsave(&atiixp_lock, flags);
 
        save_mdma_mode[drive->dn] = 0;
        if (speed >= XFER_UDMA_0) {
@@ -208,7 +210,7 @@ static int atiixp_speedproc(ide_drive_t *drive, u8 
xferspeed)
                }
        }
 
-       spin_unlock_irqrestore(&ide_lock, flags);
+       spin_unlock_irqrestore(&atiixp_lock, flags);
 
        if (speed >= XFER_SW_DMA_0)
                pio = atiixp_dma_2_pio(speed);
-
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