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From 3ab28d3476f08708cf2c256dd8a9871583edea00 Mon Sep 17 00:00:00 2001
From: Martin Sperl <kernel@martin.sperl.org>
Date: Tue, 12 May 2015 10:32:08 +0000
Subject: [PATCH 157/203] spi: bcm2835: fix kbuild compile warnings/errors and
a typo
fixes several warnings/error emmitted by the kbuild system:
* warn: cast from pointer to integer of different size
using size_t instead of u32
* error: 'SZ_4K' undeclared
moved to PAGE_SIZE and PAGE_MASK instead
Review showed also a typo in the same code where tx_buff
was checked twice instead of checking both rx and tx_buff.
Reported by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
(cherry picked from commit 7e52be0d576e8f7bc99a606f07b9d000c4340f04)
---
drivers/spi/spi-bcm2835.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
--- a/drivers/spi/spi-bcm2835.c
+++ b/drivers/spi/spi-bcm2835.c
@@ -20,6 +20,7 @@
* GNU General Public License for more details.
*/
+#include <asm/page.h>
#include <linux/clk.h>
#include <linux/completion.h>
#include <linux/delay.h>
@@ -378,18 +379,19 @@ static bool bcm2835_spi_can_dma(struct s
}
/* if we run rx/tx_buf with word aligned addresses then we are OK */
- if (((u32)tfr->tx_buf % 4 == 0) && ((u32)tfr->tx_buf % 4 == 0))
+ if ((((size_t)tfr->rx_buf & 3) == 0) &&
+ (((size_t)tfr->tx_buf & 3) == 0))
return true;
/* otherwise we only allow transfers within the same page
* to avoid wasting time on dma_mapping when it is not practical
*/
- if (((u32)tfr->tx_buf % SZ_4K) + tfr->len > SZ_4K) {
+ if (((size_t)tfr->tx_buf & PAGE_MASK) + tfr->len > PAGE_SIZE) {
dev_warn_once(&spi->dev,
"Unaligned spi tx-transfer bridging page\n");
return false;
}
- if (((u32)tfr->rx_buf % SZ_4K) + tfr->len > SZ_4K) {
+ if (((size_t)tfr->rx_buf & PAGE_MASK) + tfr->len > PAGE_SIZE) {
dev_warn_once(&spi->dev,
"Unaligned spi tx-transfer bridging page\n");
return false;
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