Changeset 91b60499 in mainline for uspace/drv/char/pl050/pl050.c

Timestamp:

2017-09-30T06:29:42Z (7 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

300f4c4

Parents:

d076f16 (diff), 6636fb19 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge support for capabilities from lp:~jakub/helenos/caps

This commit introduces capabilities as task-local names for references to kernel
objects. Kernel objects are reference-counted wrappers for a select group of
objects allocated in and by the kernel that can be made accessible to userspace
in a controlled way via integer handles.

So far, a kernel object encapsulates either an irq_t or a phone_t.

Support for the former lead to the removal of kernel-assigned devnos and
unsecure deregistration of IRQs in which a random task was able to unregister
some other task's IRQ.

File:

• uspace/drv/char/pl050/pl050.c (modified) (1 diff)

uspace/drv/char/pl050/pl050.c

@@ -212 +212 @@
         pl050->regs = regs;
 
-        rc = register_interrupt_handler(pl050->dev, res.irqs.irqs[0],
-            pl050_interrupt, &pl050_irq_code);
-        if (rc != EOK) {
+        const int irq_cap = register_interrupt_handler(pl050->dev,
+            res.irqs.irqs[0], pl050_interrupt, &pl050_irq_code);
+        if (irq_cap < 0) {
+                rc = irq_cap;
                 ddf_msg(LVL_ERROR, "Failed registering interrupt handler. (%d)",
                     rc);