diff mbox series

[v5,3/9] i2c: piix4: Move port I/O region request/release code into functions

Message ID 20220209172717.178813-4-terry.bowman@amd.com (mailing list archive)
State Not Applicable
Headers show
Series i2c: piix4: Replace cd6h/cd7h port I/O accesses with MMIO accesses | expand

Commit Message

Bowman, Terry Feb. 9, 2022, 5:27 p.m. UTC 
Move duplicated region request and release code into a function. Move is
in preparation for following MMIO changes.

Signed-off-by: Terry Bowman <terry.bowman@amd.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
---
 drivers/i2c/busses/i2c-piix4.c | 48 ++++++++++++++++++++++------------
 1 file changed, 31 insertions(+), 17 deletions(-)

Comments

Jean Delvare Feb. 11, 2022, 9:53 a.m. UTC | #1 
On Wed, 09 Feb 2022 11:27:11 -0600, Terry Bowman wrote:
> Move duplicated region request and release code into a function. Move is
> in preparation for following MMIO changes.
> 
> Signed-off-by: Terry Bowman <terry.bowman@amd.com>
> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> Reviewed-by: Jean Delvare <jdelvare@suse.de>
> ---
>  drivers/i2c/busses/i2c-piix4.c | 48 ++++++++++++++++++++++------------
>  1 file changed, 31 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c
> index 3ff68967034e..cc488b1e92c3 100644
> --- a/drivers/i2c/busses/i2c-piix4.c
> +++ b/drivers/i2c/busses/i2c-piix4.c
> @@ -165,6 +165,24 @@ struct i2c_piix4_adapdata {
>  	u8 port;		/* Port number, shifted */
>  };
>  
> +static int piix4_sb800_region_request(struct device *dev)
> +{
> +	if (!request_muxed_region(SB800_PIIX4_SMB_IDX, SB800_PIIX4_SMB_MAP_SIZE,
> +				  "sb800_piix4_smb")) {
> +		dev_err(dev,
> +			"SMBus base address index region 0x%x already in use.\n",
> +			SB800_PIIX4_SMB_IDX);
> +		return -EBUSY;
> +	}
> +
> +	return 0;
> +}
> +
> +static void piix4_sb800_region_release(struct device *dev)
> +{
> +	release_region(SB800_PIIX4_SMB_IDX, SB800_PIIX4_SMB_MAP_SIZE);
> +}
> +
>  static int piix4_setup(struct pci_dev *PIIX4_dev,
>  		       const struct pci_device_id *id)
>  {
> @@ -270,6 +288,7 @@ static int piix4_setup_sb800(struct pci_dev *PIIX4_dev,
>  	unsigned short piix4_smba;
>  	u8 smba_en_lo, smba_en_hi, smb_en, smb_en_status, port_sel;
>  	u8 i2ccfg, i2ccfg_offset = 0x10;
> +	int retval;
>  
>  	/* SB800 and later SMBus does not support forcing address */
>  	if (force || force_addr) {
> @@ -291,20 +310,16 @@ static int piix4_setup_sb800(struct pci_dev *PIIX4_dev,
>  	else
>  		smb_en = (aux) ? 0x28 : 0x2c;
>  
> -	if (!request_muxed_region(SB800_PIIX4_SMB_IDX, SB800_PIIX4_SMB_MAP_SIZE,
> -				  "sb800_piix4_smb")) {
> -		dev_err(&PIIX4_dev->dev,
> -			"SMB base address index region 0x%x already in use.\n",
> -			SB800_PIIX4_SMB_IDX);
> -		return -EBUSY;
> -	}
> +	retval = piix4_sb800_region_request(&PIIX4_dev->dev);
> +	if (retval)
> +		return retval;
>  
>  	outb_p(smb_en, SB800_PIIX4_SMB_IDX);
>  	smba_en_lo = inb_p(SB800_PIIX4_SMB_IDX + 1);
>  	outb_p(smb_en + 1, SB800_PIIX4_SMB_IDX);
>  	smba_en_hi = inb_p(SB800_PIIX4_SMB_IDX + 1);
>  
> -	release_region(SB800_PIIX4_SMB_IDX, SB800_PIIX4_SMB_MAP_SIZE);
> +	piix4_sb800_region_release(&PIIX4_dev->dev);
>  
>  	if (!smb_en) {
>  		smb_en_status = smba_en_lo & 0x10;
> @@ -373,11 +388,10 @@ static int piix4_setup_sb800(struct pci_dev *PIIX4_dev,
>  			piix4_port_shift_sb800 = SB800_PIIX4_PORT_IDX_SHIFT;
>  		}
>  	} else {
> -		if (!request_muxed_region(SB800_PIIX4_SMB_IDX,
> -					  SB800_PIIX4_SMB_MAP_SIZE,
> -					  "sb800_piix4_smb")) {
> +		retval = piix4_sb800_region_request(&PIIX4_dev->dev);
> +		if (retval)

Missing curly brace here, breaks the build.

>  			release_region(piix4_smba, SMBIOSIZE);
> -			return -EBUSY;
> +			return retval;
>  		}
>  
>  		outb_p(SB800_PIIX4_PORT_IDX_SEL, SB800_PIIX4_SMB_IDX);
> @@ -387,7 +401,7 @@ static int piix4_setup_sb800(struct pci_dev *PIIX4_dev,
>  				       SB800_PIIX4_PORT_IDX;
>  		piix4_port_mask_sb800 = SB800_PIIX4_PORT_IDX_MASK;
>  		piix4_port_shift_sb800 = SB800_PIIX4_PORT_IDX_SHIFT;
> -		release_region(SB800_PIIX4_SMB_IDX, SB800_PIIX4_SMB_MAP_SIZE);
> +		piix4_sb800_region_release(&PIIX4_dev->dev);
>  	}
>  
>  	dev_info(&PIIX4_dev->dev,
> @@ -685,9 +699,9 @@ static s32 piix4_access_sb800(struct i2c_adapter *adap, u16 addr,
>  	u8 port;
>  	int retval;
>  
> -	if (!request_muxed_region(SB800_PIIX4_SMB_IDX, SB800_PIIX4_SMB_MAP_SIZE,
> -				  "sb800_piix4_smb"))
> -		return -EBUSY;
> +	retval = piix4_sb800_region_request(&adap->dev);
> +	if (retval)
> +		return retval;
>  
>  	/* Request the SMBUS semaphore, avoid conflicts with the IMC */
>  	smbslvcnt  = inb_p(SMBSLVCNT);
> @@ -762,7 +776,7 @@ static s32 piix4_access_sb800(struct i2c_adapter *adap, u16 addr,
>  		piix4_imc_wakeup();
>  
>  release:
> -	release_region(SB800_PIIX4_SMB_IDX, SB800_PIIX4_SMB_MAP_SIZE);
> +	piix4_sb800_region_release(&adap->dev);
>  	return retval;
>  }
>
Wolfram Sang Feb. 11, 2022, 2:42 p.m. UTC | #2 
> > +		if (retval)
> 
> Missing curly brace here, breaks the build.

Bummer, need to check why this wasn't found by my build-testing.

I fixed it up and also rebased patch 6 to my change. Terry, please have
a look that I did everything correctly once I push out later today.

Thanks everyone!
Bowman, Terry Feb. 11, 2022, 3 p.m. UTC | #3 
Hi Wolfram and Jean,

On 2/11/22 08:42, Wolfram Sang wrote:
>>> +		if (retval)
>>
>> Missing curly brace here, breaks the build.
> 
> Bummer, need to check why this wasn't found by my build-testing.
> 
> I fixed it up and also rebased patch 6 to my change. Terry, please have
> a look that I did everything correctly once I push out later today.
> 
> Thanks everyone!
> 
I need to look at how I sent that out. I will look for the fix in 
i2c/for-next. Thanks for the help and review.
Bowman, Terry Feb. 11, 2022, 6:25 p.m. UTC | #4 
Hi Wolfram an Jean,

On 2/11/22 09:00, Terry Bowman wrote:
> Hi Wolfram and Jean,
> 
> On 2/11/22 08:42, Wolfram Sang wrote:
>>>> +		if (retval)
>>>
>>> Missing curly brace here, breaks the build.
>>
>> Bummer, need to check why this wasn't found by my build-testing.
>>
>> I fixed it up and also rebased patch 6 to my change. Terry, please have
>> a look that I did everything correctly once I push out later today.
>>
>> Thanks everyone!
>>
> I need to look at how I sent that out. I will look for the fix in 
> i2c/for-next. Thanks for the help and review. 

I verified the fix looks good. From commit a3325d225b00 on i2c/for-next:

@@ -373,11 +388,10 @@ static int piix4_setup_sb800(struct pci_dev *PIIX4_dev,
 			piix4_port_shift_sb800 = SB800_PIIX4_PORT_IDX_SHIFT;
 		}
 	} else {
-		if (!request_muxed_region(SB800_PIIX4_SMB_IDX,
-					  SB800_PIIX4_SMB_MAP_SIZE,
-					  "sb800_piix4_smb")) {
+		retval = piix4_sb800_region_request(&PIIX4_dev->dev);
+		if (retval) {
 			release_region(piix4_smba, SMBIOSIZE);
-			return -EBUSY;
+			return retval;
 		}
Jean Delvare Feb. 15, 2022, 8:37 a.m. UTC | #5 
On Fri, 11 Feb 2022 15:42:34 +0100, Wolfram Sang wrote:
> > > +		if (retval)  
> > 
> > Missing curly brace here, breaks the build.  
> 
> Bummer, need to check why this wasn't found by my build-testing.

Maybe you build-tested the series as a whole but not individual
patches? The series did build fine, as the missing curly brace was
added back in a later patch.
Wolfram Sang Feb. 15, 2022, 9 a.m. UTC | #6 
> Maybe you build-tested the series as a whole but not individual
> patches? The series did build fine, as the missing curly brace was
> added back in a later patch.

It wasn't that, but another gory detail. Updating my build tests is in
the works. But thanks for the help!
diff mbox series

Patch

diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c
index 3ff68967034e..cc488b1e92c3 100644
--- a/drivers/i2c/busses/i2c-piix4.c
+++ b/drivers/i2c/busses/i2c-piix4.c
@@ -165,6 +165,24 @@  struct i2c_piix4_adapdata {
 	u8 port;		/* Port number, shifted */
 };
 
+static int piix4_sb800_region_request(struct device *dev)
+{
+	if (!request_muxed_region(SB800_PIIX4_SMB_IDX, SB800_PIIX4_SMB_MAP_SIZE,
+				  "sb800_piix4_smb")) {
+		dev_err(dev,
+			"SMBus base address index region 0x%x already in use.\n",
+			SB800_PIIX4_SMB_IDX);
+		return -EBUSY;
+	}
+
+	return 0;
+}
+
+static void piix4_sb800_region_release(struct device *dev)
+{
+	release_region(SB800_PIIX4_SMB_IDX, SB800_PIIX4_SMB_MAP_SIZE);
+}
+
 static int piix4_setup(struct pci_dev *PIIX4_dev,
 		       const struct pci_device_id *id)
 {
@@ -270,6 +288,7 @@  static int piix4_setup_sb800(struct pci_dev *PIIX4_dev,
 	unsigned short piix4_smba;
 	u8 smba_en_lo, smba_en_hi, smb_en, smb_en_status, port_sel;
 	u8 i2ccfg, i2ccfg_offset = 0x10;
+	int retval;
 
 	/* SB800 and later SMBus does not support forcing address */
 	if (force || force_addr) {
@@ -291,20 +310,16 @@  static int piix4_setup_sb800(struct pci_dev *PIIX4_dev,
 	else
 		smb_en = (aux) ? 0x28 : 0x2c;
 
-	if (!request_muxed_region(SB800_PIIX4_SMB_IDX, SB800_PIIX4_SMB_MAP_SIZE,
-				  "sb800_piix4_smb")) {
-		dev_err(&PIIX4_dev->dev,
-			"SMB base address index region 0x%x already in use.\n",
-			SB800_PIIX4_SMB_IDX);
-		return -EBUSY;
-	}
+	retval = piix4_sb800_region_request(&PIIX4_dev->dev);
+	if (retval)
+		return retval;
 
 	outb_p(smb_en, SB800_PIIX4_SMB_IDX);
 	smba_en_lo = inb_p(SB800_PIIX4_SMB_IDX + 1);
 	outb_p(smb_en + 1, SB800_PIIX4_SMB_IDX);
 	smba_en_hi = inb_p(SB800_PIIX4_SMB_IDX + 1);
 
-	release_region(SB800_PIIX4_SMB_IDX, SB800_PIIX4_SMB_MAP_SIZE);
+	piix4_sb800_region_release(&PIIX4_dev->dev);
 
 	if (!smb_en) {
 		smb_en_status = smba_en_lo & 0x10;
@@ -373,11 +388,10 @@  static int piix4_setup_sb800(struct pci_dev *PIIX4_dev,
 			piix4_port_shift_sb800 = SB800_PIIX4_PORT_IDX_SHIFT;
 		}
 	} else {
-		if (!request_muxed_region(SB800_PIIX4_SMB_IDX,
-					  SB800_PIIX4_SMB_MAP_SIZE,
-					  "sb800_piix4_smb")) {
+		retval = piix4_sb800_region_request(&PIIX4_dev->dev);
+		if (retval)
 			release_region(piix4_smba, SMBIOSIZE);
-			return -EBUSY;
+			return retval;
 		}
 
 		outb_p(SB800_PIIX4_PORT_IDX_SEL, SB800_PIIX4_SMB_IDX);
@@ -387,7 +401,7 @@  static int piix4_setup_sb800(struct pci_dev *PIIX4_dev,
 				       SB800_PIIX4_PORT_IDX;
 		piix4_port_mask_sb800 = SB800_PIIX4_PORT_IDX_MASK;
 		piix4_port_shift_sb800 = SB800_PIIX4_PORT_IDX_SHIFT;
-		release_region(SB800_PIIX4_SMB_IDX, SB800_PIIX4_SMB_MAP_SIZE);
+		piix4_sb800_region_release(&PIIX4_dev->dev);
 	}
 
 	dev_info(&PIIX4_dev->dev,
@@ -685,9 +699,9 @@  static s32 piix4_access_sb800(struct i2c_adapter *adap, u16 addr,
 	u8 port;
 	int retval;
 
-	if (!request_muxed_region(SB800_PIIX4_SMB_IDX, SB800_PIIX4_SMB_MAP_SIZE,
-				  "sb800_piix4_smb"))
-		return -EBUSY;
+	retval = piix4_sb800_region_request(&adap->dev);
+	if (retval)
+		return retval;
 
 	/* Request the SMBUS semaphore, avoid conflicts with the IMC */
 	smbslvcnt  = inb_p(SMBSLVCNT);
@@ -762,7 +776,7 @@  static s32 piix4_access_sb800(struct i2c_adapter *adap, u16 addr,
 		piix4_imc_wakeup();
 
 release:
-	release_region(SB800_PIIX4_SMB_IDX, SB800_PIIX4_SMB_MAP_SIZE);
+	piix4_sb800_region_release(&adap->dev);
 	return retval;
 }