diff --git a/spi25.c b/spi25.c
index b7e8189..083d85f 100644
--- a/spi25.c
+++ b/spi25.c
@@ -764,63 +764,19 @@
  * This is according the SST25VF016 datasheet, who knows it is more
  * generic that this...
  */
-static int spi_write_status_register_ewsr(struct flashctx *flash, int status)
+static int spi_write_status_register_flag(struct flashctx *flash, int status, const unsigned char enable_opcode)
 {
 	int result;
 	int i = 0;
-	struct spi_command cmds[] = {
-	{
-	/* WRSR requires either EWSR or WREN depending on chip type. */
-		.writecnt	= JEDEC_EWSR_OUTSIZE,
-		.writearr	= (const unsigned char[]){ JEDEC_EWSR },
-		.readcnt	= 0,
-		.readarr	= NULL,
-	}, {
-		.writecnt	= JEDEC_WRSR_OUTSIZE,
-		.writearr	= (const unsigned char[]){ JEDEC_WRSR, (unsigned char) status },
-		.readcnt	= 0,
-		.readarr	= NULL,
-	}, {
-		.writecnt	= 0,
-		.writearr	= NULL,
-		.readcnt	= 0,
-		.readarr	= NULL,
-	}};
-
-	result = spi_send_multicommand(flash, cmds);
-	if (result) {
-		msg_cerr("%s failed during command execution\n",
-			__func__);
-		/* No point in waiting for the command to complete if execution
-		 * failed.
-		 */
-		return result;
-	}
-	/* WRSR performs a self-timed erase before the changes take effect.
-	 * This may take 50-85 ms in most cases, and some chips apparently
-	 * allow running RDSR only once. Therefore pick an initial delay of
-	 * 100 ms, then wait in 10 ms steps until a total of 5 s have elapsed.
+	/*
+	 * WRSR requires either EWSR or WREN depending on chip type.
+	 * The code below relies on the fact hat EWSR and WREN have the same
+	 * INSIZE and OUTSIZE.
 	 */
-	programmer_delay(100 * 1000);
-	while (spi_read_status_register(flash) & JEDEC_RDSR_BIT_WIP) {
-		if (++i > 490) {
-			msg_cerr("Error: WIP bit after WRSR never cleared\n");
-			return TIMEOUT_ERROR;
-		}
-		programmer_delay(10 * 1000);
-	}
-	return 0;
-}
-
-static int spi_write_status_register_wren(struct flashctx *flash, int status)
-{
-	int result;
-	int i = 0;
 	struct spi_command cmds[] = {
 	{
-	/* WRSR requires either EWSR or WREN depending on chip type. */
 		.writecnt	= JEDEC_WREN_OUTSIZE,
-		.writearr	= (const unsigned char[]){ JEDEC_WREN },
+		.writearr	= (const unsigned char[]){ enable_opcode },
 		.readcnt	= 0,
 		.readarr	= NULL,
 	}, {
@@ -837,8 +793,7 @@
 
 	result = spi_send_multicommand(flash, cmds);
 	if (result) {
-		msg_cerr("%s failed during command execution\n",
-			__func__);
+		msg_cerr("%s failed during command execution\n", __func__);
 		/* No point in waiting for the command to complete if execution
 		 * failed.
 		 */
@@ -862,17 +817,18 @@
 
 int spi_write_status_register(struct flashctx *flash, int status)
 {
+	int feature_bits = flash->feature_bits;
 	int ret = 1;
 
-	if (!(flash->feature_bits & (FEATURE_WRSR_WREN | FEATURE_WRSR_EWSR))) {
+	if (!(feature_bits & (FEATURE_WRSR_WREN | FEATURE_WRSR_EWSR))) {
 		msg_cdbg("Missing status register write definition, assuming "
 			 "EWSR is needed\n");
-		flash->feature_bits |= FEATURE_WRSR_EWSR;
+		feature_bits |= FEATURE_WRSR_EWSR;
 	}
-	if (flash->feature_bits & FEATURE_WRSR_WREN)
-		ret = spi_write_status_register_wren(flash, status);
-	if (ret && (flash->feature_bits & FEATURE_WRSR_EWSR))
-		ret = spi_write_status_register_ewsr(flash, status);
+	if (feature_bits & FEATURE_WRSR_WREN)
+		ret = spi_write_status_register_flag(flash, status, JEDEC_WREN);
+	if (ret && (feature_bits & FEATURE_WRSR_EWSR))
+		ret = spi_write_status_register_flag(flash, status, JEDEC_EWSR);
 	return ret;
 }