staging: wfx: use IS_ALIGNED()

It "IS_ALIGNED(ptr, 4)" is more explicit than "ptr & 3".
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20220113085524.1110708-9-Jerome.Pouiller@silabs.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wfx/bus_sdio.c

@@ -12,6 +12,7 @@
 #include <linux/interrupt.h>
 #include <linux/of_irq.h>
 #include <linux/irq.h>
+#include <linux/align.h>
 
 #include "bus.h"
 #include "wfx.h"
@@ -40,8 +41,8 @@ static int wfx_sdio_copy_from_io(void *priv, unsigned int reg_id,
 	int ret;
 
 	WARN(reg_id > 7, "chip only has 7 registers");
-	WARN(((uintptr_t)dst) & 3, "unaligned buffer size");
-	WARN(count & 3, "unaligned buffer address");
+	WARN(!IS_ALIGNED((uintptr_t)dst, 4), "unaligned buffer address");
+	WARN(!IS_ALIGNED(count, 4), "unaligned buffer size");
 
 	/* Use queue mode buffers */
 	if (reg_id == WFX_REG_IN_OUT_QUEUE)
@@ -61,8 +62,8 @@ static int wfx_sdio_copy_to_io(void *priv, unsigned int reg_id,
 	int ret;
 
 	WARN(reg_id > 7, "chip only has 7 registers");
-	WARN(((uintptr_t)src) & 3, "unaligned buffer size");
-	WARN(count & 3, "unaligned buffer address");
+	WARN(!IS_ALIGNED((uintptr_t)src, 4), "unaligned buffer address");
+	WARN(!IS_ALIGNED(count, 4), "unaligned buffer size");
 
 	/* Use queue mode buffers */
 	if (reg_id == WFX_REG_IN_OUT_QUEUE)

drivers/staging/wfx/hwio.c

@@ -8,6 +8,7 @@
 #include <linux/kernel.h>
 #include <linux/delay.h>
 #include <linux/slab.h>
+#include <linux/align.h>
 
 #include "hwio.h"
 #include "wfx.h"
@@ -221,7 +222,7 @@ int wfx_data_read(struct wfx_dev *wdev, void *buf, size_t len)
 {
 	int ret;
 
-	WARN((long)buf & 3, "%s: unaligned buffer", __func__);
+	WARN(!IS_ALIGNED((uintptr_t)buf, 4), "unaligned buffer");
 	wdev->hwbus_ops->lock(wdev->hwbus_priv);
 	ret = wdev->hwbus_ops->copy_from_io(wdev->hwbus_priv,
 					    WFX_REG_IN_OUT_QUEUE, buf, len);
@@ -237,7 +238,7 @@ int wfx_data_write(struct wfx_dev *wdev, const void *buf, size_t len)
 {
 	int ret;
 
-	WARN((long)buf & 3, "%s: unaligned buffer", __func__);
+	WARN(!IS_ALIGNED((uintptr_t)buf, 4), "unaligned buffer");
 	wdev->hwbus_ops->lock(wdev->hwbus_priv);
 	ret = wdev->hwbus_ops->copy_to_io(wdev->hwbus_priv,
 					  WFX_REG_IN_OUT_QUEUE, buf, len);