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authorSebastian Ott <sebott@linux.vnet.ibm.com>2013-06-25 15:37:44 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2013-06-26 21:10:31 +0200
commit2ab14619249cff5835aa66f2c06bfbb0204a30bf (patch)
treebd2dcc00311a63ada1e1f59a67c00221d3b704a7 /arch/s390/appldata
parenta94f0fb1a256455489d475f21c1f902a9280bf9a (diff)
downloadop-kernel-dev-2ab14619249cff5835aa66f2c06bfbb0204a30bf.zip
op-kernel-dev-2ab14619249cff5835aa66f2c06bfbb0204a30bf.tar.gz
s390/appldata_net_sum: do not use static data
Using static data for fields which are accessed by HW will fail if the driver is build as a module (since this would be vmalloc'ed memory). This Bug was revealed via "s390: remove virt_to_phys implementation" - the old virt_to_phys implementation would have translated the address but it was not guaranteed that the memory was contiguous. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/appldata')
-rw-r--r--arch/s390/appldata/appldata_net_sum.c18
1 files changed, 14 insertions, 4 deletions
diff --git a/arch/s390/appldata/appldata_net_sum.c b/arch/s390/appldata/appldata_net_sum.c
index 2d224b9..66037d2 100644
--- a/arch/s390/appldata/appldata_net_sum.c
+++ b/arch/s390/appldata/appldata_net_sum.c
@@ -29,7 +29,7 @@
* book:
* http://oss.software.ibm.com/developerworks/opensource/linux390/index.shtml
*/
-static struct appldata_net_sum_data {
+struct appldata_net_sum_data {
u64 timestamp;
u32 sync_count_1; /* after VM collected the record data, */
u32 sync_count_2; /* sync_count_1 and sync_count_2 should be the
@@ -51,7 +51,7 @@ static struct appldata_net_sum_data {
u64 rx_dropped; /* no space in linux buffers */
u64 tx_dropped; /* no space available in linux */
u64 collisions; /* collisions while transmitting */
-} __attribute__((packed)) appldata_net_sum_data;
+} __packed;
/*
@@ -121,7 +121,6 @@ static struct appldata_ops ops = {
.record_nr = APPLDATA_RECORD_NET_SUM_ID,
.size = sizeof(struct appldata_net_sum_data),
.callback = &appldata_get_net_sum_data,
- .data = &appldata_net_sum_data,
.owner = THIS_MODULE,
.mod_lvl = {0xF0, 0xF0}, /* EBCDIC "00" */
};
@@ -134,7 +133,17 @@ static struct appldata_ops ops = {
*/
static int __init appldata_net_init(void)
{
- return appldata_register_ops(&ops);
+ int ret;
+
+ ops.data = kzalloc(sizeof(struct appldata_net_sum_data), GFP_KERNEL);
+ if (!ops.data)
+ return -ENOMEM;
+
+ ret = appldata_register_ops(&ops);
+ if (ret)
+ kfree(ops.data);
+
+ return ret;
}
/*
@@ -145,6 +154,7 @@ static int __init appldata_net_init(void)
static void __exit appldata_net_exit(void)
{
appldata_unregister_ops(&ops);
+ kfree(ops.data);
}
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