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staging: nvec: Export nvec_msg_free() to clients

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Client code wishing to make use of nvec_write_sync() must
have a way to free the returned pointer, otherwise we run
out of poool memory fairly soon.

Signed-off-by: Julian Andres Klode <jak@jak-linux.org>
Acked-by: Marc Dietrich <marvin24@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Julian Andres Klode 2011-09-27 19:00:58 +02:00 committed by Greg Kroah-Hartman
parent 391d2fa95c
commit 198dd26714
2 changed files with 7 additions and 2 deletions
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6
drivers/staging/nvec/nvec.c
View File

@ -159,12 +159,13 @@ static struct nvec_msg *nvec_msg_alloc(struct nvec_chip *nvec)
*
* Free the given message
*/
static void nvec_msg_free(struct nvec_chip *nvec, struct nvec_msg *msg)
inline void nvec_msg_free(struct nvec_chip *nvec, struct nvec_msg *msg)
{
if (msg != &nvec->tx_scratch)
dev_vdbg(nvec->dev, "INFO: Free %ti\n", msg - nvec->msg_pool);
atomic_set(&msg->used, 0);
}
EXPORT_SYMBOL_GPL(nvec_msg_free);
/**
* nvec_msg_is_event - Return %true if @msg is an event
@ -259,7 +260,8 @@ EXPORT_SYMBOL(nvec_write_async);
* interrupt handlers.
*
* Returns: A pointer to the response message on success,
* %NULL on failure.
* %NULL on failure. Free with nvec_msg_free() once no longer
* used.
*/
struct nvec_msg *nvec_write_sync(struct nvec_chip *nvec,
const unsigned char *data, short size)

3
drivers/staging/nvec/nvec.h
View File

@ -192,4 +192,7 @@ extern int nvec_register_notifier(struct nvec_chip *nvec,
extern int nvec_unregister_notifier(struct device *dev,
struct notifier_block *nb,
unsigned int events);
extern void nvec_msg_free(struct nvec_chip *nvec, struct nvec_msg *msg);
#endif