Re: [PATCH v2] serial: sh-sci: Fix warnings due to improper casts and printk formats

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi Simon,

On Thursday 28 November 2013 16:27:31 Simon Horman wrote:
> On Wed, Nov 27, 2013 at 11:10:37AM +0100, Laurent Pinchart wrote:
> > Use the %zu printk specifier to print size_t variables, and cast
> > pointers to uintptr_t instead of unsigned int where applicable. This
> > fixes warnings on platforms where pointers and/or dma_addr_t have a
> > different size than int.
> > 
> > Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > Cc: linux-serial@vger.kernel.org
> > Signed-off-by: Laurent Pinchart
> > <laurent.pinchart+renesas@ideasonboard.com>
> 
> Acked-by: Simon Horman <horms+renesas@verge.net.au>
> 
> Laurent, I am assuming that you would like Greg to take this one.

Actually, as we have quite a few pending sh-sci patches interleaved with 
arch/arm patches, it would be easier if all sh-sci patches went through your 
tree for this kernel version. That's if Greg agrees of course.

> > ---
> > 
> >  drivers/tty/serial/sh-sci.c | 19 ++++++++++---------
> >  1 file changed, 10 insertions(+), 9 deletions(-)
> > 
> > Changes compared to v1:
> > 
> > - Cast to uintptr_t instead of unsigned long
> > 
> > diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
> > index 7d8103c..680e0d9 100644
> > --- a/drivers/tty/serial/sh-sci.c
> > +++ b/drivers/tty/serial/sh-sci.c
> > @@ -557,7 +557,7 @@ static inline int sci_rxd_in(struct uart_port *port)
> > 
> >  		return 1;
> >  	
> >  	/* Cast for ARM damage */
> > 
> > -	return !!__raw_readb((void __iomem *)s->cfg->port_reg);
> > +	return !!__raw_readb((void __iomem *)(uintptr_t)s->cfg->port_reg);
> > 
> >  }
> >  
> >  /* **********************************************************************
> >  *
> > 
> > @@ -1309,7 +1309,7 @@ static int sci_dma_rx_push(struct sci_port *s,
> > size_t count)> 
> >  	}
> >  	
> >  	if (room < count)
> > 
> > -		dev_warn(port->dev, "Rx overrun: dropping %u bytes\n",
> > +		dev_warn(port->dev, "Rx overrun: dropping %zu bytes\n",
> > 
> >  			 count - room);
> >  	
> >  	if (!room)
> >  	
> >  		return room;
> > 
> > @@ -1442,7 +1442,7 @@ static void work_fn_rx(struct work_struct *work)
> > 
> >  		int count;
> >  		
> >  		chan->device->device_control(chan, DMA_TERMINATE_ALL, 0);
> > 
> > -		dev_dbg(port->dev, "Read %u bytes with cookie %d\n",
> > +		dev_dbg(port->dev, "Read %zu bytes with cookie %d\n",
> > 
> >  			sh_desc->partial, sh_desc->cookie);
> >  		
> >  		spin_lock_irqsave(&port->lock, flags);
> > 
> > @@ -1691,16 +1691,17 @@ static void sci_request_dma(struct uart_port
> > *port)
> > 
> >  		s->chan_tx = chan;
> >  		sg_init_table(&s->sg_tx, 1);
> >  		/* UART circular tx buffer is an aligned page. */
> > 
> > -		BUG_ON((int)port->state->xmit.buf & ~PAGE_MASK);
> > +		BUG_ON((uintptr_t)port->state->xmit.buf & ~PAGE_MASK);
> > 
> >  		sg_set_page(&s->sg_tx, virt_to_page(port->state->xmit.buf),
> > 
> > -			    UART_XMIT_SIZE, (int)port->state->xmit.buf & ~PAGE_MASK);
> > +			    UART_XMIT_SIZE,
> > +			    (uintptr_t)port->state->xmit.buf & ~PAGE_MASK);
> > 
> >  		nent = dma_map_sg(port->dev, &s->sg_tx, 1, DMA_TO_DEVICE);
> >  		if (!nent)
> >  		
> >  			sci_tx_dma_release(s, false);
> >  		
> >  		else
> > 
> > -			dev_dbg(port->dev, "%s: mapped %d@%p to %x\n", __func__,
> > -				sg_dma_len(&s->sg_tx),
> > -				port->state->xmit.buf, sg_dma_address(&s->sg_tx));
> > +			dev_dbg(port->dev, "%s: mapped %d@%p to %lx\n", __func__,
> > +				sg_dma_len(&s->sg_tx), port->state->xmit.buf,
> > +				(uintptr_t)sg_dma_address(&s->sg_tx));
> > 
> >  		s->sg_len_tx = nent;
> > 
> > @@ -1740,7 +1741,7 @@ static void sci_request_dma(struct uart_port *port)
> > 
> >  			sg_init_table(sg, 1);
> >  			sg_set_page(sg, virt_to_page(buf[i]), s->buf_len_rx,
> > 
> > -				    (int)buf[i] & ~PAGE_MASK);
> > +				    (uintptr_t)buf[i] & ~PAGE_MASK);
> > 
> >  			sg_dma_address(sg) = dma[i];
> >  		
> >  		}
-- 
Regards,

Laurent Pinchart