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authorMax Asbock <masbock@us.ibm.com>2005-06-21 17:16:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-21 19:07:35 -0700
commit8818760512424f60ad9fafb7a087b007a9274eb3 (patch)
treefb49ce398750f42803d4631a24e4a2ffe35d79d7 /drivers/misc/ibmasm/dot_command.c
parent278d72ae8803ffcd16070c95fe1d53f4466dc741 (diff)
[PATCH] ibmasm driver: fix race in command refcount logic
This patch fixes a race in the command reference counting logic by putting spinlocks around kobject_put() in the command_put function. - Also added debug messages. - Changed a memcpy to memcpy_fromio since we are reading from io space. Signed-off-by: Max Asbock <masbock@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/misc/ibmasm/dot_command.c')
-rw-r--r--drivers/misc/ibmasm/dot_command.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/misc/ibmasm/dot_command.c b/drivers/misc/ibmasm/dot_command.c
index 478a8d898fc..13c52f866e2 100644
--- a/drivers/misc/ibmasm/dot_command.c
+++ b/drivers/misc/ibmasm/dot_command.c
@@ -33,7 +33,13 @@ void ibmasm_receive_message(struct service_processor *sp, void *message, int mes
u32 size;
struct dot_command_header *header = (struct dot_command_header *)message;
+ if (message_size == 0)
+ return;
+
size = get_dot_command_size(message);
+ if (size == 0)
+ return;
+
if (size > message_size)
size = message_size;
@@ -67,7 +73,7 @@ int ibmasm_send_driver_vpd(struct service_processor *sp)
u8 *vpd_data;
int result = 0;
- command = ibmasm_new_command(INIT_BUFFER_SIZE);
+ command = ibmasm_new_command(sp, INIT_BUFFER_SIZE);
if (command == NULL)
return -ENOMEM;
@@ -121,7 +127,7 @@ int ibmasm_send_os_state(struct service_processor *sp, int os_state)
struct os_state_command *os_state_cmd;
int result = 0;
- cmd = ibmasm_new_command(sizeof(struct os_state_command));
+ cmd = ibmasm_new_command(sp, sizeof(struct os_state_command));
if (cmd == NULL)
return -ENOMEM;