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|---|---|
| From | Roger Quadros <rogerq@ti.com> |
| Newsgroups | linux.kernel |
| Subject | [PATCH 1/5] usb: xhci: lock mutex on xhci_stop |
| Date | Tue, 18 Aug 2015 12:50:02 +0200 |
| Message-ID | <pYMCS-3Kd-17@gated-at.bofh.it> (permalink) |
| References | <pYMtc-3yQ-9@gated-at.bofh.it> |
| X-Original-To | <mathias.nyman@intel.com> |
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| Content-Type | text/plain |
| Sender | robomod@news.nic.it |
| List-ID | <linux-kernel.vger.kernel.org> |
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| Lines | 39 |
| Organization | linux.* mail to news gateway |
| X-Original-Cc | <balbi@ti.com>, <linux-usb@vger.kernel.org>, <linux-kernel@vger.kernel.org>, Roger Quadros <rogerq@ti.com> |
| X-Original-Date | Tue, 18 Aug 2015 13:39:10 +0300 |
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| Xref | csiph.com linux.kernel:1209179 |
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Else it races with xhci_setup_device
Signed-off-by: Roger Quadros <rogerq@ti.com>
---
drivers/usb/host/xhci.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 526ebc0..f998ddf 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -677,8 +677,11 @@ void xhci_stop(struct usb_hcd *hcd)
u32 temp;
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ mutex_lock(&xhci->mutex);
+
if (!usb_hcd_is_primary_hcd(hcd)) {
xhci_only_stop_hcd(xhci->shared_hcd);
+ mutex_unlock(&xhci->mutex);
return;
}
@@ -717,6 +720,7 @@ void xhci_stop(struct usb_hcd *hcd)
xhci_dbg_trace(xhci, trace_xhci_dbg_init,
"xhci_stop completed - status = %x",
readl(&xhci->op_regs->status));
+ mutex_unlock(&xhci->mutex);
}
/*
--
2.1.4
--
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[PATCH 1/5] usb: xhci: lock mutex on xhci_stop Roger Quadros <rogerq@ti.com> - 2015-08-18 12:50 +0200 Re: [PATCH 1/5] usb: xhci: lock mutex on xhci_stop Mathias Nyman <mathias.nyman@intel.com> - 2015-08-18 13:40 +0200
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