dtc2278: fix deadlock on error handling

Stop abusing ide_lock lock (switch to a private locking).

Fixes same issue as fixed by Alan Cox in atiixp host driver with
commit 6c5f8cc33eb2e10b6ab788bbe259fc142a068627.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/ide/legacy/dtc2278.c b/drivers/ide/legacy/dtc2278.c
index 253a20fc8061..acd728368771 100644
--- a/drivers/ide/legacy/dtc2278.c
+++ b/drivers/ide/legacy/dtc2278.c
@@ -67,18 +67,20 @@ static void sub22 (char b, char c)
         }
 }
 
+static DEFINE_SPINLOCK(dtc2278_lock);
+
 static void dtc2278_set_pio_mode(ide_drive_t *drive, const u8 pio)
 {
         unsigned long flags;
 
         if (pio >= 3) {
-                spin_lock_irqsave(&ide_lock, flags);
+                spin_lock_irqsave(&dtc2278_lock, flags);
                 /*
                  * This enables PIO mode4 (3?) on the first interface
                  */
                 sub22(1,0xc3);
                 sub22(0,0xa0);
-                spin_unlock_irqrestore(&ide_lock, flags);
+                spin_unlock_irqrestore(&dtc2278_lock, flags);
         } else {
                 /* we don't know how to set it back again.. */
         }