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Date: Sun, 17 Jul 2016 20:56:59 +0200 (CEST)
From: Julia Lawall <julia.lawall@...6.fr>
To: SF Markus Elfring <elfring@...rs.sourceforge.net>
cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Wolfram Sang <wsa@...-dreams.de>, devel@...verdev.osuosl.org,
LKML <linux-kernel@...r.kernel.org>,
kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 5/9] staging: ks7010: Delete unnecessary uses of the
variable "retval"
On Sun, 17 Jul 2016, SF Markus Elfring wrote:
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Sun, 17 Jul 2016 18:15:23 +0200
>
> Some return values can also be directly used for various condition checks.
> Thus remove a local variable for intermediate assignments.
>
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
> drivers/staging/ks7010/ks7010_sdio.c | 81 +++++++++++++++---------------------
> 1 file changed, 34 insertions(+), 47 deletions(-)
>
> diff --git a/drivers/staging/ks7010/ks7010_sdio.c b/drivers/staging/ks7010/ks7010_sdio.c
> index eea18fb..b3ca8e2 100644
> --- a/drivers/staging/ks7010/ks7010_sdio.c
> +++ b/drivers/staging/ks7010/ks7010_sdio.c
> @@ -90,7 +90,6 @@ static int ks7010_sdio_write(struct ks_wlan_private *priv, unsigned int address,
> void ks_wlan_hw_sleep_doze_request(struct ks_wlan_private *priv)
> {
> unsigned char rw_data;
> - int retval;
>
> DPRINTK(4, "\n");
>
> @@ -99,9 +98,10 @@ void ks_wlan_hw_sleep_doze_request(struct ks_wlan_private *priv)
>
> if (atomic_read(&priv->sleepstatus.status) == 0) {
> rw_data = GCR_B_DOZE;
> - retval =
> - ks7010_sdio_write(priv, GCR_B, &rw_data, sizeof(rw_data));
> - if (retval) {
> + if (ks7010_sdio_write(priv,
> + GCR_B,
> + &rw_data,
> + sizeof(rw_data))) {
A multi-line function call in an if test does not look nice at all. The
original code was an easy-to-read expectable pattern.
julia
> DPRINTK(1, " error : GCR_B=%02X\n", rw_data);
> goto out;
> }
> @@ -121,7 +121,6 @@ out:
> void ks_wlan_hw_sleep_wakeup_request(struct ks_wlan_private *priv)
> {
> unsigned char rw_data;
> - int retval;
>
> DPRINTK(4, "\n");
>
> @@ -130,9 +129,10 @@ void ks_wlan_hw_sleep_wakeup_request(struct ks_wlan_private *priv)
>
> if (atomic_read(&priv->sleepstatus.status) == 1) {
> rw_data = WAKEUP_REQ;
> - retval =
> - ks7010_sdio_write(priv, WAKEUP, &rw_data, sizeof(rw_data));
> - if (retval) {
> + if (ks7010_sdio_write(priv,
> + WAKEUP,
> + &rw_data,
> + sizeof(rw_data))) {
> DPRINTK(1, " error : WAKEUP=%02X\n", rw_data);
> goto out;
> }
> @@ -152,16 +152,15 @@ out:
> void ks_wlan_hw_wakeup_request(struct ks_wlan_private *priv)
> {
> unsigned char rw_data;
> - int retval;
>
> DPRINTK(4, "\n");
> if (atomic_read(&priv->psstatus.status) == PS_SNOOZE) {
> rw_data = WAKEUP_REQ;
> - retval =
> - ks7010_sdio_write(priv, WAKEUP, &rw_data, sizeof(rw_data));
> - if (retval) {
> + if (ks7010_sdio_write(priv,
> + WAKEUP,
> + &rw_data,
> + sizeof(rw_data)))
> DPRINTK(1, " error : WAKEUP=%02X\n", rw_data);
> - }
> DPRINTK(4, "wake up : WAKEUP=%02X\n", rw_data);
> priv->last_wakeup = jiffies;
> ++priv->wakeup_count;
> @@ -175,7 +174,6 @@ int _ks_wlan_hw_power_save(struct ks_wlan_private *priv)
> {
> int rc = 0;
> unsigned char rw_data;
> - int retval;
>
> if (priv->reg.powermgt == POWMGT_ACTIVE_MODE)
> return rc;
> @@ -198,11 +196,11 @@ int _ks_wlan_hw_power_save(struct ks_wlan_private *priv)
> if (!atomic_read(&priv->psstatus.confirm_wait)
> && !atomic_read(&priv->psstatus.snooze_guard)
> && !cnt_txqbody(priv)) {
> - retval =
> - ks7010_sdio_read(priv, INT_PENDING,
> + if (ks7010_sdio_read(priv,
> + INT_PENDING,
> &rw_data,
> - sizeof(rw_data));
> - if (retval) {
> + sizeof(rw_data))
> + ) {
> DPRINTK(1,
> " error : INT_PENDING=%02X\n",
> rw_data);
> @@ -212,12 +210,11 @@ int _ks_wlan_hw_power_save(struct ks_wlan_private *priv)
> }
> if (!rw_data) {
> rw_data = GCR_B_DOZE;
> - retval =
> - ks7010_sdio_write(priv,
> + if (ks7010_sdio_write(priv,
> GCR_B,
> &rw_data,
> - sizeof(rw_data));
> - if (retval) {
> + sizeof(rw_data))
> + ) {
> DPRINTK(1,
> " error : GCR_B=%02X\n",
> rw_data);
> @@ -413,7 +410,6 @@ static void rx_event_task(unsigned long dev)
> static void ks_wlan_hw_rx(void *dev, uint16_t size)
> {
> struct ks_wlan_private *priv = (struct ks_wlan_private *)dev;
> - int retval;
> struct rx_device_buffer *rx_buffer;
> struct hostif_hdr *hdr;
> unsigned char read_status;
> @@ -429,12 +425,11 @@ static void ks_wlan_hw_rx(void *dev, uint16_t size)
> }
> rx_buffer = &priv->rx_dev.rx_dev_buff[priv->rx_dev.qtail];
>
> - retval =
> - ks7010_sdio_read(priv, DATA_WINDOW, &rx_buffer->data[0],
> - hif_align_size(size));
> - if (retval) {
> + if (ks7010_sdio_read(priv,
> + DATA_WINDOW,
> + &rx_buffer->data[0],
> + hif_align_size(size)))
> goto error_out;
> - }
>
> /* length check */
> if (size > 2046 || size == 0) {
> @@ -446,12 +441,11 @@ static void ks_wlan_hw_rx(void *dev, uint16_t size)
> #endif
> /* rx_status update */
> read_status = READ_STATUS_IDLE;
> - retval =
> - ks7010_sdio_write(priv, READ_STATUS, &read_status,
> - sizeof(read_status));
> - if (retval) {
> + if (ks7010_sdio_write(priv,
> + READ_STATUS,
> + &read_status,
> + sizeof(read_status)))
> DPRINTK(1, " error : READ_STATUS=%02X\n", read_status);
> - }
> goto error_out;
> }
>
> @@ -462,12 +456,11 @@ static void ks_wlan_hw_rx(void *dev, uint16_t size)
>
> /* read status update */
> read_status = READ_STATUS_IDLE;
> - retval =
> - ks7010_sdio_write(priv, READ_STATUS, &read_status,
> - sizeof(read_status));
> - if (retval) {
> + if (ks7010_sdio_write(priv,
> + READ_STATUS,
> + &read_status,
> + sizeof(read_status)))
> DPRINTK(1, " error : READ_STATUS=%02X\n", read_status);
> - }
> DPRINTK(4, "READ_STATUS=%02X\n", read_status);
>
> if (atomic_read(&priv->psstatus.confirm_wait)) {
> @@ -489,7 +482,6 @@ static void ks7010_rw_function(struct work_struct *work)
> struct hw_info_t *hw;
> struct ks_wlan_private *priv;
> unsigned char rw_data;
> - int retval;
>
> hw = container_of(work, struct hw_info_t, rw_wq.work);
> priv = container_of(hw, struct ks_wlan_private, ks_wlan_hw);
> @@ -538,9 +530,7 @@ static void ks7010_rw_function(struct work_struct *work)
> }
>
> /* read (WriteStatus/ReadDataSize FN1:00_0014) */
> - retval =
> - ks7010_sdio_read(priv, WSTATUS_RSIZE, &rw_data, sizeof(rw_data));
> - if (retval) {
> + if (ks7010_sdio_read(priv, WSTATUS_RSIZE, &rw_data, sizeof(rw_data))) {
> DPRINTK(1, " error : WSTATUS_RSIZE=%02X psstatus=%d\n", rw_data,
> atomic_read(&priv->psstatus.status));
> goto release_host;
> @@ -708,7 +698,6 @@ static void trx_device_exit(struct ks_wlan_private *priv)
> static int ks7010_sdio_update_index(struct ks_wlan_private *priv, u32 index)
> {
> int rc = 0;
> - int retval;
> unsigned char *data_buf;
>
> data_buf = kmalloc(sizeof(u32), GFP_KERNEL);
> @@ -716,14 +705,12 @@ static int ks7010_sdio_update_index(struct ks_wlan_private *priv, u32 index)
> return 1;
>
> memcpy(data_buf, &index, sizeof(index));
> - retval = ks7010_sdio_write(priv, WRITE_INDEX, data_buf, sizeof(index));
> - if (retval) {
> + if (ks7010_sdio_write(priv, WRITE_INDEX, data_buf, sizeof(index))) {
> rc = 2;
> goto free_buf;
> }
>
> - retval = ks7010_sdio_write(priv, READ_INDEX, data_buf, sizeof(index));
> - if (retval)
> + if (ks7010_sdio_write(priv, READ_INDEX, data_buf, sizeof(index)))
> rc = 3;
> free_buf:
> kfree(data_buf);
> --
> 2.9.1
>
>
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