From mboxrd@z Thu Jan  1 00:00:00 1970
From: Matthew Stapleton <matthew4196@gmail.com>
Subject: Re: ICH7m problem using libata
Date: Thu, 18 Jan 2007 12:13:52 +1000
Message-ID: <200701181213.52934.matthew4196@gmail.com>
References: <1165253799.16504.37.camel@laundromat.jangutter.com> <1169040316.16103.18.camel@laundromat.jangutter.com> <45AE278F.5060004@gmail.com>
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To: Tejun Heo <htejun@gmail.com>
Cc: Jan Gutter <jangutter@gmail.com>, linux-ide@vger.kernel.org

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Tejun Heo wrote:
> Quite some number of ODDs don't seem to like the way hald polls them.  I
> don't think other apps will be affected by this.  I dunno much about
> hald and don't have enough time to chase it down myself but feel free to
> cc me when reporting this to hald people.  I'll try to help as much as I
> can.
> 
> Thanks.
> 
> -- 
> tejun
> 

I've attached the test programs that I wrote about earlier.  cdstatus.c causes 
a timeout after a few hours but cdstatus_working.c doesn't seem to get a 
timeout.  The timeout always occurs during open.

-- 
Matthew Stapleton

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	filename="cdstatus.c"

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <unistd.h>
#include <linux/cdrom.h>

int main(void) {
	int fd, capabilities, drive;
	char *cddrive = "/dev/cdrom";

	while (1) {
		printf("Opening %s\n", cddrive);
		fd = open (cddrive, O_RDONLY | O_NONBLOCK);
		if (fd < 0) {
			printf("Error\n");
			return 1;
		}
		printf("Sleeping\n");
		sleep(1);
		printf("Closing %s\n", cddrive);
		close(fd);
		printf("Sleeping\n");
		sleep(1);
	}
	return 0;
}


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	filename="cdstatus_working.c"

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <unistd.h>
#include <linux/cdrom.h>

int main(void) {
	int fd, capabilities, drive;
	char *cddrive = "/dev/cdrom";

	printf("Opening %s\n", cddrive);
	fd = open (cddrive, O_RDONLY | O_NONBLOCK);
	if (fd < 0) {
		printf("Error\n");
		return 1;
	}
	while (1) {
		ioctl (fd, CDROM_SET_OPTIONS, CDO_USE_FFLAGS);
		capabilities = ioctl (fd, CDROM_GET_CAPABILITY, 0);
		drive = ioctl (fd, CDROM_DRIVE_STATUS, CDSL_CURRENT);
		printf("capabilities=0x%08X, drive=0x%08X\n", capabilities, drive);
		sleep(1);
	}
	close(fd);
	return 0;
}


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