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spi: sn-f-ospi: Fix division by zero

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[ Upstream commit 3588b1c0fd ]

When there is no dummy cycle in the spi-nor commands, both dummy bus cycle
bytes and width are zero. Because of the cpu's warning when divided by
zero, the warning should be avoided. Return just zero to avoid such
calculations.

Fixes: 1b74dd64c8 ("spi: Add Socionext F_OSPI SPI flash controller driver")
Co-developed-by: Kohei Ito <ito.kohei@socionext.com>
Signed-off-by: Kohei Ito <ito.kohei@socionext.com>
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Link: https://patch.msgid.link/20250206085747.3834148-1-hayashi.kunihiko@socionext.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Kunihiko Hayashi
2025-02-06 17:57:47 +09:00
committed by Greg Kroah-Hartman
parent 36fd8f1c73
commit 4df6f005be
1 changed files with 3 additions and 0 deletions
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drivers/spi/spi-sn-f-ospi.c
+3
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@@ -116,6 +116,9 @@ struct f_ospi {
static u32 f_ospi_get_dummy_cycle(const struct spi_mem_op *op)
{
if (!op->dummy.nbytes)
return 0;
return (op->dummy.nbytes * 8) / op->dummy.buswidth;
}