Changeset f6992df in mainline

Timestamp:

2012-08-18T11:57:55Z (12 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

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

Children:

bc6762f

Parents:

1ec394e

Message:

isa: Add additional buffer constraint check.

File:

• uspace/drv/bus/isa/i8237.c (modified) (1 diff)

uspace/drv/bus/isa/i8237.c

@@ -338 +338 @@
         if ((channel > 0) && (channel < 4) && (pa >= (1 << 20)))
                 return EINVAL;
+
+        /* Buffers cannot cross 64K page boundaries */
+        if ((pa & 0xffff0000) !=  ((pa + size) & 0xffff0000))
+                return EINVAL;
         
         fibril_mutex_lock(&guard);