On Feb 17, 2009, at 6:44 AM, <d...@datangmobile.cn> <d...@datangmobile.cn
> wrote:
From: Da Yu <d...@datangmobile.cn>
Date: Tue, 17 Feb 2009 19:58:20 +0800
Subject: [PATCH] fix the interrupt loss problem on powerpc IPIC
(2.6.23)
Signed-off-by: Da Yu <d...@datangmobile.cn>
---
Please provide a bit more description as to why this fixes the issue.
- k
--- a/arch/powerpc/sysdev/ipic.c 2009-02-17 15:10:18.000000000 +0800
+++ b/arch/powerpc/sysdev/ipic.c 2009-02-17 20:05:28.000000000 +0800
@@ -561,8 +561,7 @@ static void ipic_ack_irq(unsigned int vi
spin_lock_irqsave(&ipic_lock, flags);
- temp = ipic_read(ipic->regs, ipic_info[src].pend);
- temp |= (1 << (31 - ipic_info[src].bit));
+ temp = 1 << (31 - ipic_info[src].bit);
ipic_write(ipic->regs, ipic_info[src].pend, temp);
spin_unlock_irqrestore(&ipic_lock, flags);
@@ -581,8 +580,7 @@ static void ipic_mask_irq_and_ack(unsign
temp &= ~(1 << (31 - ipic_info[src].bit));
ipic_write(ipic->regs, ipic_info[src].mask, temp);
- temp = ipic_read(ipic->regs, ipic_info[src].pend);
- temp |= (1 << (31 - ipic_info[src].bit));
+ temp = 1 << (31 - ipic_info[src].bit);
ipic_write(ipic->regs, ipic_info[src].pend, temp);
spin_unlock_irqrestore(&ipic_lock, flags);
_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@ozlabs.org
https://ozlabs.org/mailman/listinfo/linuxppc-dev
