linux-kernel - [PATCH 13/16] usb: musb: do not change dev's dma

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Date:	Mon, 22 Jul 2013 20:10:04 +0200
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	balbi@...com, george.cherian@...com,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: [PATCH 13/16] usb: musb: do not change dev's dma_mask

Commit 8d2421e ("usb: musb: kill global and static for multi instance")
removed the global dma_mask copy and replaced by parent's DMA mask. The
problem here is that if the parent does not have a dma_mask then
musb_remove() goes kaboom.
Instead trying to fix this I was thinking we do we need to erase
dma_mask in the first place?

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
---
 drivers/usb/musb/musb_core.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 9b774e7..80ffd7e 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -1843,10 +1843,6 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl)
 	if (use_dma && dev->dma_mask)
 		musb->dma_controller = dma_controller_create(musb, musb->mregs);
 
-	/* ideally this would be abstracted in platform setup */
-	if (!musb->dma_controller)
-		dev->dma_mask = NULL;
-
 	/* be sure interrupts are disabled before connecting ISR */
 	musb_platform_disable(musb);
 	musb_generic_disable(musb);
@@ -1993,9 +1989,6 @@ static int musb_remove(struct platform_device *pdev)
 
 	musb_free(musb);
 	device_init_wakeup(dev, 0);
-#ifndef CONFIG_MUSB_PIO_ONLY
-	dma_set_mask(dev, *dev->parent->dma_mask);
-#endif
 	return 0;
 }
 
-- 
1.8.3.2

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