linux-kernel - [RFC PATCH v1 11/12] musb: Replace strstarts() by str_has

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Date:   Fri,  4 Dec 2020 18:03:17 +0100
From:   laniel_francis@...vacyrequired.com
To:     Bin Liu <b-liu@...com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Francis Laniel <laniel_francis@...vacyrequired.com>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH v1 11/12] musb: Replace strstarts() by str_has_prefix().

From: Francis Laniel <laniel_francis@...vacyrequired.com>

The two functions indicates if a string begins with a given prefix.
The only difference is that strstarts() returns a bool while str_has_prefix()
returns the length of the prefix if the string begins with it or 0 otherwise.

Signed-off-by: Francis Laniel <laniel_francis@...vacyrequired.com>
---
 drivers/usb/musb/musb_cppi41.c  |  4 ++--
 drivers/usb/musb/musb_debugfs.c | 20 ++++++++++----------
 2 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/drivers/usb/musb/musb_cppi41.c b/drivers/usb/musb/musb_cppi41.c
index 7fbb8a307145..a6d22c0957c5 100644
--- a/drivers/usb/musb/musb_cppi41.c
+++ b/drivers/usb/musb/musb_cppi41.c
@@ -686,9 +686,9 @@ static int cppi41_dma_controller_start(struct cppi41_dma_controller *controller)
 		ret = of_property_read_string_index(np, "dma-names", i, &str);
 		if (ret)
 			goto err;
-		if (strstarts(str, "tx"))
+		if (str_has_prefix(str, "tx"))
 			is_tx = 1;
-		else if (strstarts(str, "rx"))
+		else if (str_has_prefix(str, "rx"))
 			is_tx = 0;
 		else {
 			dev_err(dev, "Wrong dmatype %s\n", str);
diff --git a/drivers/usb/musb/musb_debugfs.c b/drivers/usb/musb/musb_debugfs.c
index 30a89aa8a3e7..47fc32bc6507 100644
--- a/drivers/usb/musb/musb_debugfs.c
+++ b/drivers/usb/musb/musb_debugfs.c
@@ -181,36 +181,36 @@ static ssize_t musb_test_mode_write(struct file *file,
 		goto ret;
 	}
 
-	if (strstarts(buf, "force host full-speed"))
+	if (str_has_prefix(buf, "force host full-speed"))
 		test = MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_FS;
 
-	else if (strstarts(buf, "force host high-speed"))
+	else if (str_has_prefix(buf, "force host high-speed"))
 		test = MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_HS;
 
-	else if (strstarts(buf, "force host"))
+	else if (str_has_prefix(buf, "force host"))
 		test = MUSB_TEST_FORCE_HOST;
 
-	else if (strstarts(buf, "fifo access"))
+	else if (str_has_prefix(buf, "fifo access"))
 		test = MUSB_TEST_FIFO_ACCESS;
 
-	else if (strstarts(buf, "force full-speed"))
+	else if (str_has_prefix(buf, "force full-speed"))
 		test = MUSB_TEST_FORCE_FS;
 
-	else if (strstarts(buf, "force high-speed"))
+	else if (str_has_prefix(buf, "force high-speed"))
 		test = MUSB_TEST_FORCE_HS;
 
-	else if (strstarts(buf, "test packet")) {
+	else if (str_has_prefix(buf, "test packet")) {
 		test = MUSB_TEST_PACKET;
 		musb_load_testpacket(musb);
 	}
 
-	else if (strstarts(buf, "test K"))
+	else if (str_has_prefix(buf, "test K"))
 		test = MUSB_TEST_K;
 
-	else if (strstarts(buf, "test J"))
+	else if (str_has_prefix(buf, "test J"))
 		test = MUSB_TEST_J;
 
-	else if (strstarts(buf, "test SE0 NAK"))
+	else if (str_has_prefix(buf, "test SE0 NAK"))
 		test = MUSB_TEST_SE0_NAK;
 
 	musb_writeb(musb->mregs, MUSB_TESTMODE, test);
-- 
2.20.1