From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-la0-x22d.google.com ([2a00:1450:4010:c03::22d]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZeQIb-0007Tw-RP for barebox@lists.infradead.org; Tue, 22 Sep 2015 16:20:11 +0000 Received: by lahg1 with SMTP id g1so19433435lah.1 for ; Tue, 22 Sep 2015 09:19:47 -0700 (PDT) From: Peter Mamonov Date: Tue, 22 Sep 2015 18:58:32 +0300 Message-Id: <1442937514-19675-4-git-send-email-pmamonov@gmail.com> In-Reply-To: <1442937514-19675-1-git-send-email-pmamonov@gmail.com> References: <1442937514-19675-1-git-send-email-pmamonov@gmail.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 3/5] usb: ehci-hcd: detect re-entrance To: barebox@lists.infradead.org Cc: pmamonov@gmail.com Signed-off-by: Peter Mamonov --- drivers/usb/host/ehci-hcd.c | 38 ++++++++++++++++++++++++++++++++++---- 1 file changed, 34 insertions(+), 4 deletions(-) diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index e6748b0..d6df7b8 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -51,6 +51,8 @@ struct ehci_priv { int periodic_schedules; struct QH *periodic_queue; uint32_t *periodic_list; + int sem; + struct device_d *usedby; }; struct int_queue { @@ -136,6 +138,16 @@ static struct descriptor { #define ehci_is_TDI() (ehci->flags & EHCI_HAS_TT) +#define ehci_reentrance_detect(ehci) \ + if (ehci->sem) \ + dev_err(&dev->dev, "%s: re-entrance %d (%s:%s)\n", \ + __func__, \ + ehci->sem, \ + ehci->usedby->driver->name, \ + ehci->usedby->name); \ + ehci->sem++; \ + ehci->usedby = &dev->dev; + static int handshake(uint32_t *ptr, uint32_t mask, uint32_t done, int usec) { uint32_t result; @@ -893,12 +905,18 @@ submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer, { struct usb_host *host = dev->host; struct ehci_priv *ehci = to_ehci(host); + int ret; + + ehci_reentrance_detect(ehci); if (usb_pipetype(pipe) != PIPE_BULK) { dev_dbg(ehci->dev, "non-bulk pipe (type=%lu)", usb_pipetype(pipe)); + ehci->sem--; return -1; } - return ehci_submit_async(dev, pipe, buffer, length, NULL); + ret = ehci_submit_async(dev, pipe, buffer, length, NULL); + ehci->sem--; + return ret; } static int @@ -907,6 +925,9 @@ submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer, { struct usb_host *host = dev->host; struct ehci_priv *ehci = to_ehci(host); + int ret; + + ehci_reentrance_detect(ehci); if (usb_pipetype(pipe) != PIPE_CONTROL) { dev_dbg(ehci->dev, "non-control pipe (type=%lu)", usb_pipetype(pipe)); @@ -916,9 +937,13 @@ submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer, if (usb_pipedevice(pipe) == ehci->rootdev) { if (ehci->rootdev == 0) dev->speed = USB_SPEED_HIGH; - return ehci_submit_root(dev, pipe, buffer, length, setup); + ret = ehci_submit_root(dev, pipe, buffer, length, setup); + ehci->sem--; + return ret; } - return ehci_submit_async(dev, pipe, buffer, length, setup); + ret = ehci_submit_async(dev, pipe, buffer, length, setup); + ehci->sem--; + return ret; } static int @@ -1241,12 +1266,16 @@ submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer, void *backbuffer; int result = 0, ret; + ehci_reentrance_detect(ehci); + dev_dbg(ehci->dev, "dev=%p, pipe=%lu, buffer=%p, length=%d, interval=%d", dev, pipe, buffer, length, interval); queue = ehci_create_int_queue(dev, pipe, 1, length, buffer, interval); - if (!queue) + if (!queue) { + ehci->sem--; return -EINVAL; + } start = get_time_ns(); while ((backbuffer = ehci_poll_int_queue(dev, queue)) == NULL) @@ -1269,6 +1298,7 @@ submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer, ret = ehci_destroy_int_queue(dev, queue); if (!result) result = ret; + ehci->sem--; return result; } -- 2.1.4 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox