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From: Tejun Heo <htejun@gmail.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: albertl@mail.com, Jeff Garzik <jeff@garzik.org>,
	Linux IDE <linux-ide@vger.kernel.org>,
	Doug Maxey <dwm@enoyolf.org>,
	bzolnier@gmail.com, Mark Lord <liml@rtr.ca>
Subject: Re: [PATCH] libata: disable_irq() during polling IDENTIFY
Date: Mon, 07 May 2007 13:32:19 +0200	[thread overview]
Message-ID: <463F0E43.5090608@gmail.com> (raw)
In-Reply-To: <20070507121845.5d7cd1f8@the-village.bc.nu>

Alan Cox wrote:
>> Yeap, this is how IDE deals with polling commands but I'm not sure how
>> it's supposed to work with PCI IRQ sharing.  Bartlomiej, can you
>> enlighten me here?
> 
> Simple answer: Badly. If you've got the IRQ shared it mucks up the
> behaviour of the other device especially when its doing PIO.

OIC, I've been thinking I must be missing something but it's just
supposed to work that way.  Doesn't sound too attractive.  :-(

Thanks.

-- 
tejun

  reply	other threads:[~2007-05-07 11:32 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-05-07  4:30 [PATCH] libata: disable_irq() during polling IDENTIFY Albert Lee
2007-05-07  7:43 ` Tejun Heo
2007-05-07 11:18   ` Alan Cox
2007-05-07 11:32     ` Tejun Heo [this message]
2007-05-08 13:36       ` Mark Lord
2007-05-07 11:19   ` Albert Lee
2007-05-07 11:29     ` Tejun Heo
2007-05-07 11:54       ` Albert Lee
2007-05-07 12:01         ` Tejun Heo
2007-05-08 11:30           ` [PATCH] libata: disable_irq() during polling IDENTIFY (take 2) Albert Lee
2007-05-08 11:41             ` Tejun Heo
2007-05-08 12:00             ` Alan Cox
2007-05-08 12:01               ` Tejun Heo
2007-05-08 12:20                 ` Alan Cox
2007-05-08 12:27                   ` Tejun Heo
2007-05-08 12:43                     ` Alan Cox
2007-05-08 12:45                       ` Tejun Heo
2007-05-08 12:45                     ` Alan Cox
2007-05-08 12:57                       ` Tejun Heo
2007-05-08 14:59                         ` Albert Lee
2007-05-08 15:16                         ` Jeff Garzik
2007-05-11  7:20                         ` [PATCH/RFC 0/7] libata: push part of irq driven pio to workqueue Albert Lee
2007-05-11  7:24                           ` [PATCH 1/7] libata: set the state after "PIO data-in" to HSM_ST_IDLE instead of HSM_ST_LAST Albert Lee
2007-05-11  7:28                           ` [PATCH 2/7] libata: move the ata_altstatus() in ata_hsm_qc_complete() Albert Lee
2007-05-11  7:30                           ` [PATCH 3/7] libata: move ata_altstatus() out to the pio data xfer functions Albert Lee
2007-05-11  7:31                           ` [PATCH 4/7] libata: move polling idle irq check to ata_host_intr() Albert Lee
2007-05-11 14:27                             ` Tejun Heo
2007-05-11 15:25                               ` Albert Lee
2007-05-11  7:35                           ` [PATCH 5/7] libata: move and reduce locking to the pio data xfer functions Albert Lee
2007-05-11 14:37                             ` Tejun Heo
2007-05-11 14:55                               ` Alan Cox
2007-05-11 14:57                                 ` Tejun Heo
2007-05-11 15:12                                   ` Alan Cox
2007-05-11 15:14                                     ` Tejun Heo
2007-05-11 15:24                                       ` Alan Cox
2007-05-11 15:39                                       ` Alan Cox
2007-05-11 16:59                                         ` Tejun Heo
2007-05-11 17:46                                           ` Alan Cox
2007-05-11 17:53                                             ` Tejun Heo
2007-05-11 22:00                                               ` Alan Cox
2007-05-14  8:24                                                 ` Tejun Heo
2007-05-14 11:29                                                   ` Alan Cox
2007-05-11 15:48                               ` Albert Lee
2007-05-11 17:06                                 ` Tejun Heo
2007-05-11 17:38                                   ` Alan Cox
2007-05-11 17:42                                     ` Tejun Heo
2007-05-11 17:07                                 ` Tejun Heo
2007-05-11  7:37                           ` [PATCH 6/7] libata: push part of the irq driven pio out to workqueue Albert Lee
2007-05-11  7:41                           ` [PATCH 7/7] libata: ack unexpected INTRQ when polling Albert Lee
2007-05-07 14:28         ` [PATCH] libata: disable_irq() during polling IDENTIFY Alan Cox
2007-05-08 13:42           ` Mark Lord
2007-05-08 13:57             ` Alan Cox

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