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[PATCH] ibmasm driver: fix race in command refcount logic

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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>
This commit is contained in:
Max Asbock
2005-06-21 17:16:36 -07:00
committed by Linus Torvalds
parent 278d72ae88
commit 8818760512
6 changed files with 51 additions and 13 deletions
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2
drivers/misc/ibmasm/ibmasmfs.c
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@@ -321,7 +321,7 @@ static ssize_t command_file_write(struct file *file, const char __user *ubuff, s
if (command_data->command)
return -EAGAIN;
cmd = ibmasm_new_command(count);
cmd = ibmasm_new_command(command_data->sp, count);
if (!cmd)
return -ENOMEM;