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[79.23.101.208]) by smtp.gmail.com with ESMTPSA id i4sm1940258edq.34.2021.09.04.15.00.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 04 Sep 2021 15:00:57 -0700 (PDT) From: "Fabio M. De Francesco" To: Larry Finger , Phillip Potter , Greg Kroah-Hartman , Pavel Skripkin , linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org Cc: "Fabio M. De Francesco" Subject: [PATCH v3 2/3] staging: r8188eu: Shorten calls chain of rtw_read8/16/32() Date: Sun, 5 Sep 2021 00:00:47 +0200 Message-Id: <20210904220048.12822-3-fmdefrancesco@gmail.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210904220048.12822-1-fmdefrancesco@gmail.com> References: <20210904220048.12822-1-fmdefrancesco@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Shorten the calls chain of rtw_read8/16/32() down to the actual reads. For this purpose unify the three usb_read8/16/32 into the new usb_read(); make the latter parameterizable with 'size'; embed most of the code of usbctrl_vendorreq() into usb_read() and use in it the new usb_control_msg_recv() API of USB Core. Suggested-by: Greg Kroah-Hartman Co-developed-by: Pavel Skripkin Signed-off-by: Pavel Skripkin Signed-off-by: Fabio M. De Francesco --- v2->v3: No changes. v1->v2: No changes. drivers/staging/r8188eu/hal/usb_ops_linux.c | 92 +++++++++++++++++---- 1 file changed, 78 insertions(+), 14 deletions(-) diff --git a/drivers/staging/r8188eu/hal/usb_ops_linux.c b/drivers/staging/r8188eu/hal/usb_ops_linux.c index a87b0d2e87d0..f9c4fd5a2c53 100644 --- a/drivers/staging/r8188eu/hal/usb_ops_linux.c +++ b/drivers/staging/r8188eu/hal/usb_ops_linux.c @@ -97,38 +97,102 @@ static int usbctrl_vendorreq(struct intf_hdl *pintfhdl, u16 value, void *pdata, return status; } +static int usb_read(struct intf_hdl *intfhdl, u32 addr, void *data, u8 size) +{ + u16 value = (u16)(addr & 0x0000ffff); + struct adapter *adapt = intfhdl->padapter; + struct dvobj_priv *dvobjpriv = adapter_to_dvobj(adapt); + struct usb_device *udev = dvobjpriv->pusbdev; + int status; + u8 *io_buf; + int vendorreq_times = 0; + + if (adapt->bSurpriseRemoved || adapt->pwrctrlpriv.pnp_bstop_trx) { + status = -EPERM; + goto exit; + } + + mutex_lock(&dvobjpriv->usb_vendor_req_mutex); + + /* Acquire IO memory for vendorreq */ + io_buf = dvobjpriv->usb_vendor_req_buf; + + if (!io_buf) { + DBG_88E("[%s] io_buf == NULL\n", __func__); + status = -ENOMEM; + goto release_mutex; + } + + while (++vendorreq_times <= MAX_USBCTRL_VENDORREQ_TIMES) { + status = usb_control_msg_recv(udev, 0, REALTEK_USB_VENQT_CMD_REQ, + REALTEK_USB_VENQT_READ, value, + REALTEK_USB_VENQT_CMD_IDX, io_buf, + size, RTW_USB_CONTROL_MSG_TIMEOUT, + GFP_KERNEL); + if (!status) { /* Success this control transfer. */ + rtw_reset_continual_urb_error(dvobjpriv); + memcpy(data, io_buf, size); + } else { /* error cases */ + DBG_88E("reg 0x%x, usb %s %u fail, status:%d vendorreq_times:%d\n", + value, "read", size, status, vendorreq_times); + + if (status == (-ESHUTDOWN) || status == -ENODEV) { + adapt->bSurpriseRemoved = true; + } else { + struct hal_data_8188e *haldata = GET_HAL_DATA(adapt); + + haldata->srestpriv.wifi_error_status = USB_VEN_REQ_CMD_FAIL; + } + + if (rtw_inc_and_chk_continual_urb_error(dvobjpriv)) { + adapt->bSurpriseRemoved = true; + break; + } + } + + /* firmware download is checksummed, don't retry */ + if ((value >= FW_8188E_START_ADDRESS && value <= FW_8188E_END_ADDRESS) || !status) + break; + } + +release_mutex: + mutex_unlock(&dvobjpriv->usb_vendor_req_mutex); +exit: + return status; +} + u8 rtw_read8(struct adapter *adapter, u32 addr) { - struct io_priv *pio_priv = &adapter->iopriv; - struct intf_hdl *pintfhdl = &pio_priv->intf; - u16 wvalue = (u16)(addr & 0x0000ffff); + struct io_priv *io_priv = &adapter->iopriv; + struct intf_hdl *intfhdl = &io_priv->intf; + u16 value = (u16)(addr & 0x0000ffff); u8 data; - usbctrl_vendorreq(pintfhdl, wvalue, &data, 1, REALTEK_USB_VENQT_READ); + usb_read(intfhdl, value, &data, 1); return data; } u16 rtw_read16(struct adapter *adapter, u32 addr) { - struct io_priv *pio_priv = &adapter->iopriv; - struct intf_hdl *pintfhdl = &pio_priv->intf; - u16 wvalue = (u16)(addr & 0x0000ffff); - __le32 data; + struct io_priv *io_priv = &adapter->iopriv; + struct intf_hdl *intfhdl = &io_priv->intf; + u16 value = (u16)(addr & 0x0000ffff); + __le16 data; - usbctrl_vendorreq(pintfhdl, wvalue, &data, 2, REALTEK_USB_VENQT_READ); + usb_read(intfhdl, value, &data, 2); - return (u16)(le32_to_cpu(data) & 0xffff); + return le16_to_cpu(data); } u32 rtw_read32(struct adapter *adapter, u32 addr) { - struct io_priv *pio_priv = &adapter->iopriv; - struct intf_hdl *pintfhdl = &pio_priv->intf; - u16 wvalue = (u16)(addr & 0x0000ffff); + struct io_priv *io_priv = &adapter->iopriv; + struct intf_hdl *intfhdl = &io_priv->intf; + u16 value = (u16)(addr & 0x0000ffff); __le32 data; - usbctrl_vendorreq(pintfhdl, wvalue, &data, 4, REALTEK_USB_VENQT_READ); + usb_read(intfhdl, value, &data, 4); return le32_to_cpu(data); } -- 2.33.0