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From: ludovic.desroches@atmel.com (Ludovic Desroches)
To: linux-arm-kernel@lists.infradead.org
Subject: atmel-mci causes kernel panic when CONFIG_DEBUG_VM is set
Date: Thu, 19 May 2011 09:53:12 +0200	[thread overview]
Message-ID: <4DD4CC68.80408@atmel.com> (raw)

Hello,

There is a bug with the atmel-mci driver when the debug feature 
CONFIG_DEBUG_VM is set.

Into the atmci_read_data_pio function we use flush_dcache_page (do we 
really need it?) which call the page_mapping function where we can find 
VM_BUG_ON(PageSlab(Page)). Then a kernel panic happens.

I don't understand the purpose of the VM_BUG_ON(PageSlab(Page)) (the 
page comes from a scatter list). How could I correct this problem?

Thanks for your help

Regards,

Ludovic

             reply	other threads:[~2011-05-19  7:53 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-05-19  7:53 Ludovic Desroches [this message]
2011-05-19  8:04 ` atmel-mci causes kernel panic when CONFIG_DEBUG_VM is set Barry Song
2011-05-19  9:24   ` Ludovic Desroches
2011-05-19 12:17     ` Ludovic Desroches
2011-05-19 15:16       ` Ludovic Desroches
2011-05-19 18:25 ` Uwe Kleine-König

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