From: Jan Dittmer <jdittmer@ppp0.net>
To: James Nelson <james4765@verizon.net>
Cc: kernel-janitors@lists.osdl.org, linux-kernel@vger.kernel.org,
akpm@osdl.org
Subject: Re: [PATCH] lcd: replace cli()/sti() with spin_lock_irqsave()/spin_unlock_irqrestore()
Date: Sat, 18 Dec 2004 01:58:56 +0100 [thread overview]
Message-ID: <41C380D0.9020001@ppp0.net> (raw)
In-Reply-To: <20041217235927.17998.75228.61750@localhost.localdomain>
James Nelson wrote:
> Remove the cli()/sti() calls in drivers/char/lcd.c
Why is this cli() there in the first place? ioctl is already
called under lock_kernel.
> Signed-off-by: James Nelson <james4765@gmail.com>
>
> diff -urN --exclude='*~' linux-2.6.10-rc3-mm1-original/drivers/char/lcd.c linux-2.6.10-rc3-mm1/drivers/char/lcd.c
> --- linux-2.6.10-rc3-mm1-original/drivers/char/lcd.c 2004-12-03 16:53:42.000000000 -0500
> +++ linux-2.6.10-rc3-mm1/drivers/char/lcd.c 2004-12-17 18:57:10.760197439 -0500
> @@ -33,6 +33,8 @@
>
> #include "lcd.h"
>
> +static spinlock_t lcd_lock = SPIN_LOCK_UNLOCKED;
> +
> static int lcd_ioctl(struct inode *inode, struct file *file,
> unsigned int cmd, unsigned long arg);
>
> @@ -464,14 +466,13 @@
> }
>
> printk("Churning and Burning -");
> - save_flags(flags);
> for (i = 0; i < FLASH_SIZE; i = i + 128) {
>
> if (copy_from_user
> (rom, display.RomImage + i, 128))
> return -EFAULT;
The driver is leaking memory, rom is not freed in this case.
Jan
next prev parent reply other threads:[~2004-12-18 0:59 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-17 23:59 [PATCH] lcd: replace cli()/sti() with spin_lock_irqsave()/spin_unlock_irqrestore() James Nelson
2004-12-18 0:58 ` Jan Dittmer [this message]
2004-12-18 3:02 ` Jim Nelson
2004-12-18 4:40 ` [KJ] " Matthew Wilcox
2004-12-18 4:15 ` [KJ] " Matthew Wilcox
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