Changeset 3dea17f in mainline for kernel/genarch/src/kbd/ns16550.c

Timestamp:

2006-10-19T17:33:08Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

f0450658

Parents:

80ca47e

Message:

Add mutual exclusion to keyboard grab and release
functions on sparc64, ppc32, mips32 and ia64.

File:

• kernel/genarch/src/kbd/ns16550.c (modified) (3 diffs)

kernel/genarch/src/kbd/ns16550.c

@@ -81 +81 @@
 void ns16550_grab(void)
 {
+        ipl_t ipl = interrupts_disable();
+
         ns16550_ier_write(&ns16550, IER_ERBFI);         /* enable receiver interrupt */
         
@@ -86 +88 @@
                 (void) ns16550_rbr_read(&ns16550);
 
+        spinlock_lock(&ns16550_irq.lock);
         ns16550_irq.notif_cfg.notify = false;
+        spinlock_unlock(&ns16550_irq.lock);
+        interrupts_restore(ipl);
 }
 
@@ -92 +97 @@
 void ns16550_release(void)
 {
+        ipl_t ipl = interrupts_disable();
+        spinlock_lock(&ns16550_irq.lock);
         if (ns16550_irq.notif_cfg.answerbox)
                 ns16550_irq.notif_cfg.notify = true;
+        spinlock_unlock(&ns16550_irq.lock);
+        interrupts_restore(ipl);
 }