From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Shreshtha Kumar SAHU <shreshthakumar.sahu@stericsson.com>
Cc: "gregkh@suse.de" <gregkh@suse.de>,
"linux-serial@vger.kernel.org" <linux-serial@vger.kernel.org>,
"rmk+kernel@arm.linux.org.uk" <rmk+kernel@arm.linux.org.uk>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] amba-pl011: clear previous interrupts before request_irq
Date: Wed, 18 Jan 2012 11:41:00 +0000 [thread overview]
Message-ID: <20120118114100.064e2c8f@pyramind.ukuu.org.uk> (raw)
In-Reply-To: <20120118100410.GB889@bnru02.bnr.st.com>
> /*
> + * Clear previous interrupts before installing interrupt handler
> + */
> + spin_lock_irq(&uap->port.lock);
> + uap->im = 0;
> + writew(uap->im, uap->port.membase + UART011_IMSC);
> + writew(0xffff, uap->port.membase + UART011_ICR);
> + spin_unlock_irq(&uap->port.lock);
I'm confused why you use spin_lock_irq before you've enabled the IRQ in
the first place but looks fine.
Alan
next prev parent reply other threads:[~2012-01-18 11:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-17 10:34 [PATCH] amba-pl011: clear previous interrupts before request_irq Shreshtha Kumar SAHU
2012-01-18 10:04 ` Shreshtha Kumar SAHU
2012-01-18 10:15 ` Russell King
2012-01-19 11:07 ` Shreshtha Kumar SAHU
2012-01-18 11:41 ` Alan Cox [this message]
2012-01-19 11:15 ` Shreshtha Kumar SAHU
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