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authorGeorge Cherian <george.cherian@ti.com>2013-05-27 05:05:49 -0400
committerFelipe Balbi <balbi@ti.com>2013-05-28 15:17:20 -0400
commit5bf8fae33d14cc5c3c53a926f9079f92c8b082b0 (patch)
treed4510155df11add92afe6d8324342e87dd8ef73c /drivers/usb
parent022d0547aa8b00ff5035ba6207ebc2c08ea0a51f (diff)
usb: dwc3: gadget: free trb pool only from epnum 2
we never allocate a TRB pool for physical endpoints 0 and 1 so trying to free it (a invalid TRB pool pointer) will lead us in a warning while removing dwc3.ko module. In order to fix the situation, all we have to do is skip dwc3_free_trb_pool() for physical endpoints 0 and 1 just as we while deleting endpoints from the endpoints list. Cc: stable@vger.kernel.org Signed-off-by: George Cherian <george.cherian@ti.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/dwc3/gadget.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 2b6e7e001207..b5e5b35df49c 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1706,11 +1706,19 @@ static void dwc3_gadget_free_endpoints(struct dwc3 *dwc)
1706 dep = dwc->eps[epnum]; 1706 dep = dwc->eps[epnum];
1707 if (!dep) 1707 if (!dep)
1708 continue; 1708 continue;
1709 1709 /*
1710 dwc3_free_trb_pool(dep); 1710 * Physical endpoints 0 and 1 are special; they form the
1711 1711 * bi-directional USB endpoint 0.
1712 if (epnum != 0 && epnum != 1) 1712 *
1713 * For those two physical endpoints, we don't allocate a TRB
1714 * pool nor do we add them the endpoints list. Due to that, we
1715 * shouldn't do these two operations otherwise we would end up
1716 * with all sorts of bugs when removing dwc3.ko.
1717 */
1718 if (epnum != 0 && epnum != 1) {
1719 dwc3_free_trb_pool(dep);
1713 list_del(&dep->endpoint.ep_list); 1720 list_del(&dep->endpoint.ep_list);
1721 }
1714 1722
1715 kfree(dep); 1723 kfree(dep);
1716 } 1724 }