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usb: chipidea: cleanup dma_pool if udc_start() fails 

If udc_start() fails the qh_pool dma-pool cannot be closed because
it's still in use. This patch factors out the dma_pool_free() loop
into destroy_eps() and calls it in the error path of udc_start(),
too.

Cc: stable <stable@vger.kernel.org>
Reviewed-by: Richard Zhao <richard.zhao@freescale.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Marc Kleine-Budde 2012-09-12 14:58:03 +03:00 committed by Greg Kroah-Hartman
parent c9d1f947a8
commit ad6b1b97fe
1 changed files with 15 additions and 8 deletions
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23
drivers/usb/chipidea/udc.c
View File

@ -1503,6 +1503,17 @@ static int init_eps(struct ci13xxx *ci)
return retval;
}
static void destroy_eps(struct ci13xxx *ci)
{
int i;
for (i = 0; i < ci->hw_ep_max; i++) {
struct ci13xxx_ep *mEp = &ci->ci13xxx_ep[i];
dma_pool_free(ci->qh_pool, mEp->qh.ptr, mEp->qh.dma);
}
}
/**
* ci13xxx_start: register a gadget driver
* @gadget: our gadget
@ -1710,7 +1721,7 @@ static int udc_start(struct ci13xxx *ci)
if (ci->platdata->flags & CI13XXX_REQUIRE_TRANSCEIVER) {
if (ci->transceiver == NULL) {
retval = -ENODEV;
goto free_pools;
goto destroy_eps;
}
}
@ -1761,6 +1772,8 @@ unreg_device:
put_transceiver:
if (!IS_ERR_OR_NULL(ci->transceiver) && ci->global_phy)
usb_put_phy(ci->transceiver);
destroy_eps:
destroy_eps(ci);
free_pools:
dma_pool_destroy(ci->td_pool);
free_qh_pool:
@ -1775,18 +1788,12 @@ free_qh_pool:
*/
static void udc_stop(struct ci13xxx *ci)
{
int i;
if (ci == NULL)
return;
usb_del_gadget_udc(&ci->gadget);
for (i = 0; i < ci->hw_ep_max; i++) {
struct ci13xxx_ep *mEp = &ci->ci13xxx_ep[i];
dma_pool_free(ci->qh_pool, mEp->qh.ptr, mEp->qh.dma);
}
destroy_eps(ci);
dma_pool_destroy(ci->td_pool);
dma_pool_destroy(ci->qh_pool);