linux-kernel - [PATCH 9/9] rsxx: Disallows DMA transfer during format.

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Date:	Tue, 30 Apr 2013 15:01:58 -0500
From:	"Philip J. Kelleher" <pjk1939@...ux.vnet.ibm.com>
To:	axboe@...nel.dk
Cc:	linux-kernel@...r.kernel.org, klebers@...ux.vnet.ibm.com,
	brking@...ux.vnet.ibm.com
Subject: [PATCH 9/9] rsxx: Disallows DMA transfer during format.

From: Philip J Kelleher <pjk1939@...ux.vnet.ibm.com>

Verifies the card is not formatting before DMAs are
transferred.

Signed-off-by: Philip J Kelleher <pjk1939@...ux.vnet.ibm.com>
-------------------------------------------------------------------------------


diff -uprN -X linux-block-vanilla/Documentation/dontdiff linux-block-vanilla/drivers/block/rsxx/dma.c linux-block/drivers/block/rsxx/dma.c
--- linux-block-vanilla/drivers/block/rsxx/dma.c	2013-04-29 16:06:49.997249172 -0500
+++ linux-block/drivers/block/rsxx/dma.c	2013-04-29 16:10:46.960184429 -0500
@@ -721,7 +721,8 @@ int rsxx_dma_queue_bio(struct rsxx_cardi
 		}
 	}
 
-	if (unlikely(card->halt))
+	if (unlikely(card->halt) ||
+	    unlikely(card->state == CARD_STATE_FORMATTING))
 		goto bvec_err;
 
 	for (i = 0; i < card->n_targets; i++) {

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