From: Arnd Bergmann <arnd@kernel.org>
To: Thomas Gleixner <tglx@linutronix.de>,
Marc Zyngier <maz@kernel.org>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com
Subject: [PATCH] irqchip/gic-v3: fix OF_BAD_ADDR error handling
Date: Tue, 23 Mar 2021 14:18:35 +0100 [thread overview]
Message-ID: <20210323131842.2773094-1-arnd@kernel.org> (raw)
From: Arnd Bergmann <arnd@arndb.de>
When building with extra warnings enabled, clang points out a
mistake in the error handling:
drivers/irqchip/irq-gic-v3-mbi.c:306:21: error: result of comparison of constant 18446744073709551615 with expression of type 'phys_addr_t' (aka 'unsigned int') is always false [-Werror,-Wtautological-constant-out-of-range-compare]
if (mbi_phys_base == OF_BAD_ADDR) {
Truncate the constant to the same type as the variable it gets compared
to, to shut make the check work and void the warning.
Fixes: 505287525c24 ("irqchip/gic-v3: Add support for Message Based Interrupts as an MSI controller")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/irqchip/irq-gic-v3-mbi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/irqchip/irq-gic-v3-mbi.c b/drivers/irqchip/irq-gic-v3-mbi.c
index 563a9b366294..e81e89a81cb5 100644
--- a/drivers/irqchip/irq-gic-v3-mbi.c
+++ b/drivers/irqchip/irq-gic-v3-mbi.c
@@ -303,7 +303,7 @@ int __init mbi_init(struct fwnode_handle *fwnode, struct irq_domain *parent)
reg = of_get_property(np, "mbi-alias", NULL);
if (reg) {
mbi_phys_base = of_translate_address(np, reg);
- if (mbi_phys_base == OF_BAD_ADDR) {
+ if (mbi_phys_base == (phys_addr_t)OF_BAD_ADDR) {
ret = -ENXIO;
goto err_free_mbi;
}
--
2.29.2
next reply other threads:[~2021-03-23 13:19 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-23 13:18 Arnd Bergmann [this message]
2021-03-23 22:06 ` [PATCH] irqchip/gic-v3: fix OF_BAD_ADDR error handling Nick Desaulniers
2021-03-24 10:14 ` Marc Zyngier
2021-03-24 10:55 ` Arnd Bergmann
2021-04-07 12:31 ` Marc Zyngier
2021-04-07 12:38 ` [irqchip: irq/irqchip-next] irqchip/gic-v3: Fix " irqchip-bot for Arnd Bergmann
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