Return-Path: Received: from buildserver.ru.mvista.com (unknown [85.21.88.6]) by ozlabs.org (Postfix) with ESMTP id 86121DDE06 for ; Sun, 9 Nov 2008 04:51:49 +1100 (EST) Date: Sat, 8 Nov 2008 20:51:48 +0300 From: Anton Vorontsov To: David Brownell Subject: [PATCH 2/2] usb/fsl_qe_udc: Check for muram allocation errors Message-ID: <20081108175148.GB6010@oksana.dev.rtsoft.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Cc: Greg Kroah-Hartman , Li Yang , linux-usb@vger.kernel.org, linuxppc-dev@ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , The QE UDC doesn't check for cpm_muram_alloc() return values, this might cause all sorts of misbehaviour when cpm_muram_alloc() failed to allocate the muram memory. While at at, change few dev_dbg() calls to dev_err(), so that the driver would not die silently. Signed-off-by: Anton Vorontsov --- drivers/usb/gadget/fsl_qe_udc.c | 12 +++++++++--- 1 files changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/usb/gadget/fsl_qe_udc.c b/drivers/usb/gadget/fsl_qe_udc.c index 1fe8b44..94c38e4 100644 --- a/drivers/usb/gadget/fsl_qe_udc.c +++ b/drivers/usb/gadget/fsl_qe_udc.c @@ -26,6 +26,7 @@ #include #include #include +#include #include #include #include @@ -370,6 +371,9 @@ static int qe_ep_bd_init(struct qe_udc *udc, unsigned char pipe_num) /* alloc multi-ram for BD rings and set the ep parameters */ tmp_addr = cpm_muram_alloc(sizeof(struct qe_bd) * (bdring_len + USB_BDRING_LEN_TX), QE_ALIGNMENT_OF_BD); + if (IS_ERR_VALUE(tmp_addr)) + return -ENOMEM; + out_be16(&epparam->rbase, (u16)tmp_addr); out_be16(&epparam->tbase, (u16)(tmp_addr + (sizeof(struct qe_bd) * bdring_len))); @@ -689,7 +693,7 @@ en_done2: en_done1: spin_unlock_irqrestore(&udc->lock, flags); en_done: - dev_dbg(udc->dev, "failed to initialize %s\n", ep->ep.name); + dev_err(udc->dev, "failed to initialize %s\n", ep->ep.name); return -ENODEV; } @@ -2405,6 +2409,8 @@ static struct qe_udc __devinit *qe_udc_config(struct of_device *ofdev) tmp_addr = cpm_muram_alloc((USB_MAX_ENDPOINTS * sizeof(struct usb_ep_para)), USB_EP_PARA_ALIGNMENT); + if (IS_ERR_VALUE(tmp_addr)) + goto cleanup; for (i = 0; i < USB_MAX_ENDPOINTS; i++) { out_be16(&usbpram->epptr[i], (u16)tmp_addr); @@ -2510,7 +2516,7 @@ static int __devinit qe_udc_probe(struct of_device *ofdev, /* Initialize the udc structure including QH member and other member */ udc_controller = qe_udc_config(ofdev); if (!udc_controller) { - dev_dbg(&ofdev->dev, "udc_controll is NULL\n"); + dev_err(&ofdev->dev, "failed to initialize\n"); return -ENOMEM; } @@ -2565,7 +2571,7 @@ static int __devinit qe_udc_probe(struct of_device *ofdev, /* create a buf for ZLP send, need to remain zeroed */ udc_controller->nullbuf = kzalloc(256, GFP_KERNEL); if (udc_controller->nullbuf == NULL) { - dev_dbg(udc_controller->dev, "cannot alloc nullbuf\n"); + dev_err(udc_controller->dev, "cannot alloc nullbuf\n"); ret = -ENOMEM; goto err3; } -- 1.5.6.3