spi: use min_t() to improve code

Merge series from Qianfeng Rong <rongqianfeng@vivo.com>:

Use min_t() to reduce the code and improve readability.

No functional changes.

Author: broonie

drivers/spi/spi-fsl-lpspi.c

@@ -25,6 +25,7 @@
 #include <linux/spi/spi.h>
 #include <linux/spi/spi_bitbang.h>
 #include <linux/types.h>
+#include <linux/minmax.h>
 
 #define DRIVER_NAME "fsl_lpspi"
 
@@ -473,10 +474,9 @@ static int fsl_lpspi_setup_transfer(struct spi_controller *controller,
 		fsl_lpspi->tx = fsl_lpspi_buf_tx_u32;
 	}
 
-	if (t->len <= fsl_lpspi->txfifosize)
-		fsl_lpspi->watermark = t->len;
-	else
-		fsl_lpspi->watermark = fsl_lpspi->txfifosize;
+	fsl_lpspi->watermark = min_t(typeof(fsl_lpspi->watermark),
+				     fsl_lpspi->txfifosize,
+				     t->len);
 
 	if (fsl_lpspi_can_dma(controller, spi, t))
 		fsl_lpspi->usedma = true;

drivers/spi/spi-npcm-fiu.c

@@ -13,6 +13,7 @@
 #include <linux/vmalloc.h>
 #include <linux/regmap.h>
 #include <linux/of.h>
+#include <linux/minmax.h>
 #include <linux/spi/spi-mem.h>
 #include <linux/mfd/syscon.h>
 
@@ -498,10 +499,7 @@ static int npcm_fiu_read(struct spi_mem *mem, const struct spi_mem_op *op)
 
 	do {
 		addr = ((u32)op->addr.val + i);
-		if (currlen < 16)
-			readlen = currlen;
-		else
-			readlen = 16;
+		readlen = min_t(int, currlen, 16);
 
 		buf_ptr = data + i;
 		ret = npcm_fiu_uma_read(mem, op, addr, true, buf_ptr,

drivers/spi/spi-pl022.c

@@ -33,6 +33,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/of.h>
 #include <linux/pinctrl/consumer.h>
+#include <linux/minmax.h>
 
 /*
  * This macro is used to define some register default values.
@@ -760,10 +761,9 @@ static void setup_dma_scatter(struct pl022 *pl022,
 			 * we just feed in this, else we stuff in as much
 			 * as we can.
 			 */
-			if (bytesleft < (PAGE_SIZE - offset_in_page(bufp)))
-				mapbytes = bytesleft;
-			else
-				mapbytes = PAGE_SIZE - offset_in_page(bufp);
+			mapbytes = min_t(int, bytesleft,
+					 PAGE_SIZE - offset_in_page(bufp));
+
 			sg_set_page(sg, virt_to_page(bufp),
 				    mapbytes, offset_in_page(bufp));
 			bufp += mapbytes;
@@ -775,10 +775,7 @@ static void setup_dma_scatter(struct pl022 *pl022,
 	} else {
 		/* Map the dummy buffer on every page */
 		for_each_sg(sgtab->sgl, sg, sgtab->nents, i) {
-			if (bytesleft < PAGE_SIZE)
-				mapbytes = bytesleft;
-			else
-				mapbytes = PAGE_SIZE;
+			mapbytes = min_t(int, bytesleft, PAGE_SIZE);
 			sg_set_page(sg, virt_to_page(pl022->dummypage),
 				    mapbytes, 0);
 			bytesleft -= mapbytes;