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Re: [RFC] endianness fixes

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On Fri, 2007-12-07 at 16:15 +0100, Holger Schurig wrote:
> Hi !
> 
> Recently I found that that sparse by default doesn't endianness
> checks. So I changed my compilation habit to be
> 
> make modules C=1 SUBDIRS=drivers/net/wireless/libertas CHECKFLAGS="-D__CHECK_ENDIAN__"      
> 
> so that I get the little-endian checks from sparse as well. That
> showed up a good bunch of problems. The following RFC patch is
> against libertas-2.6. I hope that all fixes are correct.
> 
> 
> diff --git a/drivers/net/wireless/libertas/hostcmd.h b/drivers/net/wireless/libertas/hostcmd.h
> index be69ae6..32c97b9 100644
> --- a/drivers/net/wireless/libertas/hostcmd.h
> +++ b/drivers/net/wireless/libertas/hostcmd.h
> @@ -418,13 +418,13 @@ struct cmd_ds_802_11_rf_antenna {
>  };
>  
>  struct cmd_ds_802_11_monitor_mode {
> -	u16 action;
> -	u16 mode;
> +	__le16 action;
> +	__le16 mode;
>  };
>  
>  struct cmd_ds_set_boot2_ver {
> -	u16 action;
> -	u16 version;
> +	__le16 action;
> +	__le16 version;
>  };
>  
>  struct cmd_ds_802_11_ps_mode {
> diff --git a/drivers/net/wireless/libertas/cmd.c b/drivers/net/wireless/libertas/cmd.c
> index 9563636..4a45d2b 100644
> --- a/drivers/net/wireless/libertas/cmd.c
> +++ b/drivers/net/wireless/libertas/cmd.c
> @@ -431,7 +431,7 @@ static int lbs_cmd_802_11_snmp_mib(struct lbs_private *priv,
>  		u8 mode = (u8) (size_t) pdata_buf;
>  		pSNMPMIB->querytype = cpu_to_le16(CMD_ACT_SET);
>  		pSNMPMIB->oid = cpu_to_le16((u16) DESIRED_BSSTYPE_I);
> -		pSNMPMIB->bufsize = sizeof(u8);
> +		pSNMPMIB->bufsize = cpu_to_le16(sizeof(u8));
>  		if (mode == IW_MODE_ADHOC) {
>  			ucTemp = SNMP_MIB_VALUE_ADHOC;
>  		} else {
> @@ -451,8 +451,8 @@ static int lbs_cmd_802_11_snmp_mib(struct lbs_private *priv,
>  			pSNMPMIB->oid = cpu_to_le16((u16) DOT11D_I);
>  
>  			if (cmd_action == CMD_ACT_SET) {
> -				pSNMPMIB->querytype = CMD_ACT_SET;
> -				pSNMPMIB->bufsize = sizeof(u16);
> +				pSNMPMIB->querytype = cpu_to_le16(CMD_ACT_SET);
> +				pSNMPMIB->bufsize = cpu_to_le16(sizeof(u16));
>  				ulTemp = *(u32 *)pdata_buf;
>  				*((__le16 *)(pSNMPMIB->value)) =
>  				    cpu_to_le16((u16) ulTemp);
> @@ -484,7 +484,7 @@ static int lbs_cmd_802_11_snmp_mib(struct lbs_private *priv,
>  		{
>  
>  			u32 ulTemp;
> -			pSNMPMIB->oid = le16_to_cpu((u16) RTSTHRESH_I);
> +			pSNMPMIB->oid = cpu_to_le16(RTSTHRESH_I);
>  
>  			if (cmd_action == CMD_ACT_GET) {
>  				pSNMPMIB->querytype = cpu_to_le16(CMD_ACT_GET);
> @@ -759,7 +759,7 @@ static int lbs_cmd_reg_access(struct lbs_private *priv,
>  
>  	offval = (struct lbs_offset_value *)pdata_buf;
>  
> -	switch (cmdptr->command) {
> +	switch (le16_to_cpu(cmdptr->command)) {
>  	case CMD_MAC_REG_ACCESS:
>  		{
>  			struct cmd_ds_mac_reg_access *macreg;
> @@ -999,7 +999,7 @@ void lbs_queue_cmd(struct lbs_adapter *adapter,
>  	}
>  
>  	/* Exit_PS command needs to be queued in the header always. */
> -	if (cmdptr->command == CMD_802_11_PS_MODE) {
> +	if (le16_to_cpu(cmdptr->command) == CMD_802_11_PS_MODE) {
>  		struct cmd_ds_802_11_ps_mode *psm = &cmdptr->params.psmode;
>  		if (psm->action == cpu_to_le16(CMD_SUBCMD_EXIT_PS)) {
>  			if (adapter->psstate != PS_STATE_FULL_POWER)
> @@ -1062,15 +1062,14 @@ static int DownloadcommandToStation(struct lbs_private *priv,
>  	adapter->cur_cmd_retcode = 0;
>  	spin_unlock_irqrestore(&adapter->driver_lock, flags);
>  
> -	cmdsize = cmdptr->size;
> -	command = cpu_to_le16(cmdptr->command);
> +	cmdsize = le16_to_cpu(cmdptr->size);
> +	command = le16_to_cpu(cmdptr->command);
>  
>  	lbs_deb_host("DNLD_CMD: command 0x%04x, size %d, jiffies %lu\n",
> -		    command, le16_to_cpu(cmdptr->size), jiffies);
> +		    command, cmdsize, jiffies);
>  	lbs_deb_hex(LBS_DEB_HOST, "DNLD_CMD", cmdnode->bufvirtualaddr, cmdsize);
>  
>  	cmdnode->cmdwaitqwoken = 0;
> -	cmdsize = cpu_to_le16(cmdsize);
>  
>  	ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) cmdptr, cmdsize);
>  
> @@ -1426,9 +1425,10 @@ int lbs_prepare_and_send_command(struct lbs_private *priv,
>  
>  #define ACTION_NUMLED_TLVTYPE_LEN_FIELDS_LEN 8
>  			cmdptr->size =
> -			    cpu_to_le16(gpio->header.len + S_DS_GEN +
> -					     ACTION_NUMLED_TLVTYPE_LEN_FIELDS_LEN);
> -			gpio->header.len = cpu_to_le16(gpio->header.len);
> +			    cpu_to_le16(le16_to_cpu(gpio->header.len)
> +				+ S_DS_GEN
> +				+ ACTION_NUMLED_TLVTYPE_LEN_FIELDS_LEN);
> +			gpio->header.len = gpio->header.len;

You can remove the line immediately.  gpio->header.len _should_ be
__le16 already (from types.h) so therefore we don't need this bit at
all.

Rest of the stuff looks great though.

Dan

>  			ret = 0;
>  			break;
> diff --git a/drivers/net/wireless/libertas/cmdresp.c b/drivers/net/wireless/libertas/cmdresp.c
> index 22a6973..d229967 100644
> --- a/drivers/net/wireless/libertas/cmdresp.c
> +++ b/drivers/net/wireless/libertas/cmdresp.c
> @@ -561,7 +561,7 @@ static int lbs_ret_802_11_subscribe_event(struct lbs_private *priv,
>  	lbs_deb_enter(LBS_DEB_CMD);
>  
>  	if (dst_event->action == cpu_to_le16(CMD_ACT_GET)) {
> -		dst_event->events = le16_to_cpu(cmd_event->events);
> +		dst_event->events = cmd_event->events;
>  		memcpy(dst_event->tlv, cmd_event->tlv, sizeof(dst_event->tlv));
>  	}
>  
> @@ -882,7 +882,7 @@ int lbs_process_rx_command(struct lbs_private *priv)
>  
>  	if (adapter->cur_cmd->pdata_size) {
>  		struct cmd_ds_gen *r = (struct cmd_ds_gen *)resp;
> -		u16 sz = cpu_to_le16(resp->size) - S_DS_GEN;
> +		u16 sz = le16_to_cpu(resp->size) - S_DS_GEN;
>  		if (sz > *adapter->cur_cmd->pdata_size) {
>  			lbs_pr_err("response 0x%04x doesn't fit into "
>  				"buffer (%d > %d)\n", respcmd,
> diff --git a/drivers/net/wireless/libertas/if_usb.c b/drivers/net/wireless/libertas/if_usb.c
> index d5fc7d7..c51ca0b 100644
> --- a/drivers/net/wireless/libertas/if_usb.c
> +++ b/drivers/net/wireless/libertas/if_usb.c
> @@ -107,7 +107,7 @@ static void if_usb_set_boot2_ver(struct lbs_private *priv)
>  	int rsp_len = sizeof(b2_cmd);
>  
>  	b2_cmd.action = 0;
> -	b2_cmd.version = cpu_to_le16(priv->boot2_version);
> +	b2_cmd.version = priv->boot2_version;
>  
>  	if (lbs_cmd(priv, CMD_SET_BOOT2_VER, &b2_cmd, sizeof(b2_cmd),
>  		    &b2_cmd, &rsp_len)) {
> @@ -227,7 +227,7 @@ static int if_usb_probe(struct usb_interface *intf,
>  	priv->hw_host_to_card = if_usb_host_to_card;
>  	priv->hw_get_int_status = if_usb_get_int_status;
>  	priv->hw_read_event_cause = if_usb_read_event_cause;
> -	priv->boot2_version = le16_to_cpu(udev->descriptor.bcdDevice);
> +	priv->boot2_version = udev->descriptor.bcdDevice;
>  
>  	/* Delay 200 ms to waiting for the FW ready */
>  	if_usb_submit_rx_urb(cardp);
> 
> 
> I now only have a few sparse warnings related to get_unaligned() or a weird
> casting in if_sdio.c.

-
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