[PATCH-next] spi: hisi-kunpeng: Fix Woverflow warning on conversion

[PATCH-next] spi: hisi-kunpeng: Fix Woverflow warning on conversion

[Jay Fang]

Fix warning Woverflow on type conversion reported on x86_64:

  drivers/spi/spi-hisi-kunpeng.c:361:9: warning: conversion from 'long unsigned int' to 'u32'
  {aka 'unsigned int'} changes value from '18446744073709551600' to '4294967280' [-Woverflow]

The registers are 32 bit, so fix by casting to u32.

Fixes: c770d8631e18 ("spi: Add HiSilicon SPI Controller Driver for Kunpeng SoCs")
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Jay Fang <f.fangjian@huawei.com>
---
 drivers/spi/spi-hisi-kunpeng.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-hisi-kunpeng.c b/drivers/spi/spi-hisi-kunpeng.c
index abc0cd5..3f986ba 100644
--- a/drivers/spi/spi-hisi-kunpeng.c
+++ b/drivers/spi/spi-hisi-kunpeng.c
@@ -358,7 +358,7 @@ static int hisi_spi_transfer_one(struct spi_controller *master,
 	smp_mb();
 
 	/* Enable all interrupts and the controller */
-	writel(~IMR_MASK, hs->regs + HISI_SPI_IMR);
+	writel(~(u32)IMR_MASK, hs->regs + HISI_SPI_IMR);
 	writel(1, hs->regs + HISI_SPI_ENR);
 
 	return 1;
-- 
2.7.4

Re: [PATCH-next] spi: hisi-kunpeng: Fix Woverflow warning on conversion

[Mark Brown]

On Wed, 7 Apr 2021 10:31:00 +0800, Jay Fang wrote:
> Fix warning Woverflow on type conversion reported on x86_64:
> 
>   drivers/spi/spi-hisi-kunpeng.c:361:9: warning: conversion from 'long unsigned int' to 'u32'
>   {aka 'unsigned int'} changes value from '18446744073709551600' to '4294967280' [-Woverflow]
> 
> The registers are 32 bit, so fix by casting to u32.

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next

Thanks!

[1/1] spi: hisi-kunpeng: Fix Woverflow warning on conversion
      commit: 9a446cf97af70ee81ba177703b67ac4955a5edcc

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
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patches will not be replaced.

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Thanks,
Mark