[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-Id: <20230724132736.124106-1-luxu.kernel@bytedance.com>
Date: Mon, 24 Jul 2023 21:27:36 +0800
From: "luxu.kernel" <luxujoy@...il.com>
To: paul.walmsley@...ive.com, palmer@...belt.com, aou@...s.berkeley.edu
Cc: linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
luxu.kernel@...edance.com
Subject: [PATCH] riscv: Fix local irq restore when flags indicates irq disabled
When arch_local_irq_restore() is called with flags indicating irqs
disabled, we need to clear SR_IE bit in CSR_STATUS, whereas current
implementation based on csr_set() function only sets SR_IE bit of
CSR_STATUS when SR_IE bit of flags is high and does nothing when
SR_IE bit of flags is low.
This commit supplies csr clear operation when calling irq restore
function with flags indicating irq disabled.
Signed-off-by: luxu.kernel <luxu.kernel@...edance.com>
---
arch/riscv/include/asm/irqflags.h | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/riscv/include/asm/irqflags.h b/arch/riscv/include/asm/irqflags.h
index 08d4d6a5b7e9..7c31fc3c3559 100644
--- a/arch/riscv/include/asm/irqflags.h
+++ b/arch/riscv/include/asm/irqflags.h
@@ -49,7 +49,10 @@ static inline int arch_irqs_disabled(void)
/* set interrupt enabled status */
static inline void arch_local_irq_restore(unsigned long flags)
{
- csr_set(CSR_STATUS, flags & SR_IE);
+ if (flags & SR_IE)
+ csr_set(CSR_STATUS, SR_IE);
+ else
+ csr_clear(CSR_STATUS, SR_IE);
}
#endif /* _ASM_RISCV_IRQFLAGS_H */
--
2.20.1
Powered by blists - more mailing lists