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

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: 1b74dd6 ("spi: Add Socionext F_OSPI SPI flash controller driver") Co-developed-by: Kohei Ito <[email protected]> Signed-off-by: Kohei Ito <[email protected]> Signed-off-by: Kunihiko Hayashi <[email protected]> Link: https://patch.msgid.link/[email protected] Signed-off-by: Mark Brown <[email protected]>
gl-prout · Feb 6, 2025 · 3588b1c · 3588b1c
1 parent aff2355
commit 3588b1c
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/drivers/spi/spi-sn-f-ospi.c b/drivers/spi/spi-sn-f-ospi.c
@@ -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;
 }