[PATCH] irqchip/gic-v3-its: Use FIELD_MODIFY()

[Hans Zhang <18255117159@163.com>]

Use FIELD_MODIFY() to remove open-coded bit manipulation.
No functional change intended.

Signed-off-by: Hans Zhang <18255117159@163.com>
---
 drivers/irqchip/irq-gic-v3-its.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 291d7668cc8d..e78795b7acfd 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -4784,8 +4784,7 @@ static bool __maybe_unused its_enable_quirk_cavium_22375(void *data)
 	struct its_node *its = data;
 
 	/* erratum 22375: only alloc 8MB table size (20 bits) */
-	its->typer &= ~GITS_TYPER_DEVBITS;
-	its->typer |= FIELD_PREP(GITS_TYPER_DEVBITS, 20 - 1);
+	FIELD_MODIFY(GITS_TYPER_DEVBITS, &its->typer, 20 - 1);
 	its->flags |= ITS_FLAGS_WORKAROUND_CAVIUM_22375;
 
 	return true;
@@ -4805,8 +4804,7 @@ static bool __maybe_unused its_enable_quirk_qdf2400_e0065(void *data)
 	struct its_node *its = data;
 
 	/* On QDF2400, the size of the ITE is 16Bytes */
-	its->typer &= ~GITS_TYPER_ITT_ENTRY_SIZE;
-	its->typer |= FIELD_PREP(GITS_TYPER_ITT_ENTRY_SIZE, 16 - 1);
+	FIELD_MODIFY(GITS_TYPER_ITT_ENTRY_SIZE, &its->typer, 16 - 1);
 
 	return true;
 }
@@ -4840,10 +4838,8 @@ static bool __maybe_unused its_enable_quirk_socionext_synquacer(void *data)
 		its->get_msi_base = its_irq_get_msi_base_pre_its;
 
 		ids = ilog2(pre_its_window[1]) - 2;
-		if (device_ids(its) > ids) {
-			its->typer &= ~GITS_TYPER_DEVBITS;
-			its->typer |= FIELD_PREP(GITS_TYPER_DEVBITS, ids - 1);
-		}
+		if (device_ids(its) > ids)
+			FIELD_MODIFY(GITS_TYPER_DEVBITS, &its->typer, ids - 1);
 
 		/* the pre-ITS breaks isolation, so disable MSI remapping */
 		its->msi_domain_flags &= ~IRQ_DOMAIN_FLAG_ISOLATED_MSI;

base-commit: 3b3bea6d4b9c162f9e555905d96b8c1da67ecd5b
-- 
2.34.1