diff mbox series

usb: gadget: UMS: fix 64-bit division on ARM32

Message ID 20240321153004.709994-2-caleb.connolly@linaro.org
State Superseded
Headers show
Series usb: gadget: UMS: fix 64-bit division on ARM32 | expand

Commit Message

Caleb Connolly March 21, 2024, 3:28 p.m. UTC
The patch introducing support for dynamic sector sizes changed the types
used in some divisions, resulting in the compiler attempting to use
libgcc helpers (__aeabi_ldivmod). Replace these divisions with calls to
lldiv() to handle this correctly.

Fixes: 74e56e0c5065 ("usb: gadget: UMS: support multiple sector sizes")
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
---
Hi Mattijs,

Sorry for not catching that sooner! I compile tested this locally and a
CI pipeline is running here: https://source.denx.de/u-boot/custodians/u-boot-snapdragon/-/pipelines/20029

Regards,
Caleb
---
 drivers/usb/gadget/f_mass_storage.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

Comments

Mattijs Korpershoek March 21, 2024, 4:48 p.m. UTC | #1
Hi Caleb,

Thank you for the patch.

On jeu., mars 21, 2024 at 15:28, Caleb Connolly <caleb.connolly@linaro.org> wrote:

> The patch introducing support for dynamic sector sizes changed the types
> used in some divisions, resulting in the compiler attempting to use
> libgcc helpers (__aeabi_ldivmod). Replace these divisions with calls to
> lldiv() to handle this correctly.
>
> Fixes: 74e56e0c5065 ("usb: gadget: UMS: support multiple sector sizes")
> Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>

Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>

Would it be okay if I squashed this into
commit 74e56e0c5065 ("usb: gadget: UMS: support multiple sector sizes")
?

I'd like to not (intentionally) send any patches that don't compile to Tom.


> ---
> Hi Mattijs,
>
> Sorry for not catching that sooner! I compile tested this locally and a

No worries, thanks a lot for the quick fix.

> CI pipeline is running here: https://source.denx.de/u-boot/custodians/u-boot-snapdragon/-/pipelines/20029

I can see from the above pipeline that some other failures are ongoing,
but they are not related to lldiv().

arm-linux-gnueabi-ld.bfd: common/dfu.o: in function `run_usb_dnl_gadget':
common/dfu.c:82:(.text.run_usb_dnl_gadget+0xd8): undefined reference to `dm_usb_gadget_handle_interrupts'
arm-linux-gnueabi-ld.bfd: common/dfu.c:108:(.text.run_usb_dnl_gadget+0x11c): undefined reference to `dm_usb_gadget_handle_interrupts'
make[1]: *** [Makefile:1793: u-boot] Error

See: https://source.denx.de/u-boot/custodians/u-boot-snapdragon/-/jobs/802759#L470

I suspect that this is related to:
https://lore.kernel.org/r/all/20240225152715.1821613-1-jonas@kwiboo.se/


>
> Regards,
> Caleb
> ---
>  drivers/usb/gadget/f_mass_storage.c | 13 +++++++------
>  1 file changed, 7 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c
> index d880928044f4..ef90c7ec7fb5 100644
> --- a/drivers/usb/gadget/f_mass_storage.c
> +++ b/drivers/usb/gadget/f_mass_storage.c
> @@ -239,8 +239,9 @@
>  /* #define VERBOSE_DEBUG */
>  /* #define DUMP_MSGS */
>  
>  #include <config.h>
> +#include <div64.h>
>  #include <hexdump.h>
>  #include <log.h>
>  #include <malloc.h>
>  #include <common.h>
> @@ -768,10 +769,10 @@ static int do_read(struct fsg_common *common)
>  		}
>  
>  		/* Perform the read */
>  		rc = ums[common->lun].read_sector(&ums[common->lun],
> -				      file_offset / curlun->blksize,
> -				      amount / curlun->blksize,
> +				      lldiv(file_offset, curlun->blksize),
> +				      lldiv(amount, curlun->blksize),
>  				      (char __user *)bh->buf);
>  		if (!rc)
>  			return -EIO;
>  
> @@ -942,10 +943,10 @@ static int do_write(struct fsg_common *common)
>  			amount = bh->outreq->actual;
>  
>  			/* Perform the write */
>  			rc = ums[common->lun].write_sector(&ums[common->lun],
> -					       file_offset / curlun->blksize,
> -					       amount / curlun->blksize,
> +					       lldiv(file_offset, curlun->blksize),
> +					       lldiv(amount, curlun->blksize),
>  					       (char __user *)bh->buf);
>  			if (!rc)
>  				return -EIO;
>  			nwritten = rc * curlun->blksize;
> @@ -1058,10 +1059,10 @@ static int do_verify(struct fsg_common *common)
>  		}
>  
>  		/* Perform the read */
>  		rc = ums[common->lun].read_sector(&ums[common->lun],
> -				      file_offset / curlun->blksize,
> -				      amount / curlun->blksize,
> +				      lldiv(file_offset, curlun->blksize),
> +				      lldiv(amount, curlun->blksize),
>  				      (char __user *)bh->buf);
>  		if (!rc)
>  			return -EIO;
>  		nread = rc * curlun->blksize;
> -- 
> 2.44.0
Caleb Connolly March 21, 2024, 5:01 p.m. UTC | #2
On 21/03/2024 16:48, Mattijs Korpershoek wrote:
> Hi Caleb,
> 
> Thank you for the patch.
> 
> On jeu., mars 21, 2024 at 15:28, Caleb Connolly <caleb.connolly@linaro.org> wrote:
> 
>> The patch introducing support for dynamic sector sizes changed the types
>> used in some divisions, resulting in the compiler attempting to use
>> libgcc helpers (__aeabi_ldivmod). Replace these divisions with calls to
>> lldiv() to handle this correctly.
>>
>> Fixes: 74e56e0c5065 ("usb: gadget: UMS: support multiple sector sizes")
>> Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
> 
> Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
> 
> Would it be okay if I squashed this into
> commit 74e56e0c5065 ("usb: gadget: UMS: support multiple sector sizes")
> ?
> 
> I'd like to not (intentionally) send any patches that don't compile to Tom.

For sure, feel free to do that.
> 
> 
>> ---
>> Hi Mattijs,
>>
>> Sorry for not catching that sooner! I compile tested this locally and a
> 
> No worries, thanks a lot for the quick fix.
> 
>> CI pipeline is running here: https://source.denx.de/u-boot/custodians/u-boot-snapdragon/-/pipelines/20029
> 
> I can see from the above pipeline that some other failures are ongoing,
> but they are not related to lldiv().
> 
> arm-linux-gnueabi-ld.bfd: common/dfu.o: in function `run_usb_dnl_gadget':
> common/dfu.c:82:(.text.run_usb_dnl_gadget+0xd8): undefined reference to `dm_usb_gadget_handle_interrupts'
> arm-linux-gnueabi-ld.bfd: common/dfu.c:108:(.text.run_usb_dnl_gadget+0x11c): undefined reference to `dm_usb_gadget_handle_interrupts'
> make[1]: *** [Makefile:1793: u-boot] Error

Ah! I guess this is caused by the "select DM_USB_GADGET" patch...

You can revert it for now and I'll just select DM_USB_GADGET for qcom.

It seems like there's a bunch going on around here with the cleanup by
Marek. I can revisit this once that's settled
> 
> See: https://source.denx.de/u-boot/custodians/u-boot-snapdragon/-/jobs/802759#L470
> 
> I suspect that this is related to:
> https://lore.kernel.org/r/all/20240225152715.1821613-1-jonas@kwiboo.se/

Is this fixed by the ("usb: udc: dwc3: Fold board
dm_usb_gadget_handle_interrupts() into DWC3") series?
> 
> 
>>
>> Regards,
>> Caleb
>> ---
>>  drivers/usb/gadget/f_mass_storage.c | 13 +++++++------
>>  1 file changed, 7 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c
>> index d880928044f4..ef90c7ec7fb5 100644
>> --- a/drivers/usb/gadget/f_mass_storage.c
>> +++ b/drivers/usb/gadget/f_mass_storage.c
>> @@ -239,8 +239,9 @@
>>  /* #define VERBOSE_DEBUG */
>>  /* #define DUMP_MSGS */
>>  
>>  #include <config.h>
>> +#include <div64.h>
>>  #include <hexdump.h>
>>  #include <log.h>
>>  #include <malloc.h>
>>  #include <common.h>
>> @@ -768,10 +769,10 @@ static int do_read(struct fsg_common *common)
>>  		}
>>  
>>  		/* Perform the read */
>>  		rc = ums[common->lun].read_sector(&ums[common->lun],
>> -				      file_offset / curlun->blksize,
>> -				      amount / curlun->blksize,
>> +				      lldiv(file_offset, curlun->blksize),
>> +				      lldiv(amount, curlun->blksize),
>>  				      (char __user *)bh->buf);
>>  		if (!rc)
>>  			return -EIO;
>>  
>> @@ -942,10 +943,10 @@ static int do_write(struct fsg_common *common)
>>  			amount = bh->outreq->actual;
>>  
>>  			/* Perform the write */
>>  			rc = ums[common->lun].write_sector(&ums[common->lun],
>> -					       file_offset / curlun->blksize,
>> -					       amount / curlun->blksize,
>> +					       lldiv(file_offset, curlun->blksize),
>> +					       lldiv(amount, curlun->blksize),
>>  					       (char __user *)bh->buf);
>>  			if (!rc)
>>  				return -EIO;
>>  			nwritten = rc * curlun->blksize;
>> @@ -1058,10 +1059,10 @@ static int do_verify(struct fsg_common *common)
>>  		}
>>  
>>  		/* Perform the read */
>>  		rc = ums[common->lun].read_sector(&ums[common->lun],
>> -				      file_offset / curlun->blksize,
>> -				      amount / curlun->blksize,
>> +				      lldiv(file_offset, curlun->blksize),
>> +				      lldiv(amount, curlun->blksize),
>>  				      (char __user *)bh->buf);
>>  		if (!rc)
>>  			return -EIO;
>>  		nread = rc * curlun->blksize;
>> -- 
>> 2.44.0
Mattijs Korpershoek March 22, 2024, 9:21 a.m. UTC | #3
Hi Caleb,

On jeu., mars 21, 2024 at 17:01, Caleb Connolly <caleb.connolly@linaro.org> wrote:

> On 21/03/2024 16:48, Mattijs Korpershoek wrote:
>> Hi Caleb,
>> 
>> Thank you for the patch.
>> 
>> On jeu., mars 21, 2024 at 15:28, Caleb Connolly <caleb.connolly@linaro.org> wrote:
>> 
>>> The patch introducing support for dynamic sector sizes changed the types
>>> used in some divisions, resulting in the compiler attempting to use
>>> libgcc helpers (__aeabi_ldivmod). Replace these divisions with calls to
>>> lldiv() to handle this correctly.
>>>
>>> Fixes: 74e56e0c5065 ("usb: gadget: UMS: support multiple sector sizes")
>>> Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
>> 
>> Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
>> 
>> Would it be okay if I squashed this into
>> commit 74e56e0c5065 ("usb: gadget: UMS: support multiple sector sizes")
>> ?
>> 
>> I'd like to not (intentionally) send any patches that don't compile to Tom.
>
> For sure, feel free to do that.

Done, here:
https://source.denx.de/u-boot/custodians/u-boot-dfu/-/commit/304fa0aa445384e5e681a54abf413850591cec10

>> 
>> 
>>> ---
>>> Hi Mattijs,
>>>
>>> Sorry for not catching that sooner! I compile tested this locally and a
>> 
>> No worries, thanks a lot for the quick fix.
>> 
>>> CI pipeline is running here: https://source.denx.de/u-boot/custodians/u-boot-snapdragon/-/pipelines/20029
>> 
>> I can see from the above pipeline that some other failures are ongoing,
>> but they are not related to lldiv().
>> 
>> arm-linux-gnueabi-ld.bfd: common/dfu.o: in function `run_usb_dnl_gadget':
>> common/dfu.c:82:(.text.run_usb_dnl_gadget+0xd8): undefined reference to `dm_usb_gadget_handle_interrupts'
>> arm-linux-gnueabi-ld.bfd: common/dfu.c:108:(.text.run_usb_dnl_gadget+0x11c): undefined reference to `dm_usb_gadget_handle_interrupts'
>> make[1]: *** [Makefile:1793: u-boot] Error
>
> Ah! I guess this is caused by the "select DM_USB_GADGET" patch...
>
> You can revert it for now and I'll just select DM_USB_GADGET for qcom.

Will do, I'll drop it from the branch.

>
> It seems like there's a bunch going on around here with the cleanup by
> Marek. I can revisit this once that's settled

Yeah, we are working on reworking the interrupt handling a bit since it
has quite some limitations.

>> 
>> See: https://source.denx.de/u-boot/custodians/u-boot-snapdragon/-/jobs/802759#L470
>> 
>> I suspect that this is related to:
>> https://lore.kernel.org/r/all/20240225152715.1821613-1-jonas@kwiboo.se/
>
> Is this fixed by the ("usb: udc: dwc3: Fold board
> dm_usb_gadget_handle_interrupts() into DWC3") series?

Unfortunately, no:
https://source.denx.de/u-boot/custodians/u-boot-dfu/-/jobs/803228#L578

>> 
>> 
>>>
>>> Regards,
>>> Caleb
>>> ---
>>>  drivers/usb/gadget/f_mass_storage.c | 13 +++++++------
>>>  1 file changed, 7 insertions(+), 6 deletions(-)
>>>
>>> diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c
>>> index d880928044f4..ef90c7ec7fb5 100644
>>> --- a/drivers/usb/gadget/f_mass_storage.c
>>> +++ b/drivers/usb/gadget/f_mass_storage.c
>>> @@ -239,8 +239,9 @@
>>>  /* #define VERBOSE_DEBUG */
>>>  /* #define DUMP_MSGS */
>>>  
>>>  #include <config.h>
>>> +#include <div64.h>
>>>  #include <hexdump.h>
>>>  #include <log.h>
>>>  #include <malloc.h>
>>>  #include <common.h>
>>> @@ -768,10 +769,10 @@ static int do_read(struct fsg_common *common)
>>>  		}
>>>  
>>>  		/* Perform the read */
>>>  		rc = ums[common->lun].read_sector(&ums[common->lun],
>>> -				      file_offset / curlun->blksize,
>>> -				      amount / curlun->blksize,
>>> +				      lldiv(file_offset, curlun->blksize),
>>> +				      lldiv(amount, curlun->blksize),
>>>  				      (char __user *)bh->buf);
>>>  		if (!rc)
>>>  			return -EIO;
>>>  
>>> @@ -942,10 +943,10 @@ static int do_write(struct fsg_common *common)
>>>  			amount = bh->outreq->actual;
>>>  
>>>  			/* Perform the write */
>>>  			rc = ums[common->lun].write_sector(&ums[common->lun],
>>> -					       file_offset / curlun->blksize,
>>> -					       amount / curlun->blksize,
>>> +					       lldiv(file_offset, curlun->blksize),
>>> +					       lldiv(amount, curlun->blksize),
>>>  					       (char __user *)bh->buf);
>>>  			if (!rc)
>>>  				return -EIO;
>>>  			nwritten = rc * curlun->blksize;
>>> @@ -1058,10 +1059,10 @@ static int do_verify(struct fsg_common *common)
>>>  		}
>>>  
>>>  		/* Perform the read */
>>>  		rc = ums[common->lun].read_sector(&ums[common->lun],
>>> -				      file_offset / curlun->blksize,
>>> -				      amount / curlun->blksize,
>>> +				      lldiv(file_offset, curlun->blksize),
>>> +				      lldiv(amount, curlun->blksize),
>>>  				      (char __user *)bh->buf);
>>>  		if (!rc)
>>>  			return -EIO;
>>>  		nread = rc * curlun->blksize;
>>> -- 
>>> 2.44.0
>
> -- 
> // Caleb (they/them)
diff mbox series

Patch

diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c
index d880928044f4..ef90c7ec7fb5 100644
--- a/drivers/usb/gadget/f_mass_storage.c
+++ b/drivers/usb/gadget/f_mass_storage.c
@@ -239,8 +239,9 @@ 
 /* #define VERBOSE_DEBUG */
 /* #define DUMP_MSGS */
 
 #include <config.h>
+#include <div64.h>
 #include <hexdump.h>
 #include <log.h>
 #include <malloc.h>
 #include <common.h>
@@ -768,10 +769,10 @@  static int do_read(struct fsg_common *common)
 		}
 
 		/* Perform the read */
 		rc = ums[common->lun].read_sector(&ums[common->lun],
-				      file_offset / curlun->blksize,
-				      amount / curlun->blksize,
+				      lldiv(file_offset, curlun->blksize),
+				      lldiv(amount, curlun->blksize),
 				      (char __user *)bh->buf);
 		if (!rc)
 			return -EIO;
 
@@ -942,10 +943,10 @@  static int do_write(struct fsg_common *common)
 			amount = bh->outreq->actual;
 
 			/* Perform the write */
 			rc = ums[common->lun].write_sector(&ums[common->lun],
-					       file_offset / curlun->blksize,
-					       amount / curlun->blksize,
+					       lldiv(file_offset, curlun->blksize),
+					       lldiv(amount, curlun->blksize),
 					       (char __user *)bh->buf);
 			if (!rc)
 				return -EIO;
 			nwritten = rc * curlun->blksize;
@@ -1058,10 +1059,10 @@  static int do_verify(struct fsg_common *common)
 		}
 
 		/* Perform the read */
 		rc = ums[common->lun].read_sector(&ums[common->lun],
-				      file_offset / curlun->blksize,
-				      amount / curlun->blksize,
+				      lldiv(file_offset, curlun->blksize),
+				      lldiv(amount, curlun->blksize),
 				      (char __user *)bh->buf);
 		if (!rc)
 			return -EIO;
 		nread = rc * curlun->blksize;