[PATCH] wlcore: sdio: warn only once for wl12xx_sdio_raw_{read,write}() failures

[Javier Martinez Canillas <javierm@redhat.com>]

Report these failures only once, instead of keep logging the warnings for
the same condition every time that a SDIO read or write is attempted. This
behaviour is spammy and unnecessarily pollutes the kernel log buffer.

For example, on an AM625 BeaglePlay board where accessing a SDIO WiFi chip
fails with an -110 error:

  $ dmesg | grep "sdio write\|read failed (-110)" | wc -l
  39

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
---

 drivers/net/wireless/ti/wlcore/sdio.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/ti/wlcore/sdio.c b/drivers/net/wireless/ti/wlcore/sdio.c
index eb5482ed76ae..47ecf33a0fbe 100644
--- a/drivers/net/wireless/ti/wlcore/sdio.c
+++ b/drivers/net/wireless/ti/wlcore/sdio.c
@@ -75,8 +75,8 @@ static int __must_check wl12xx_sdio_raw_read(struct device *child, int addr,
 
 	sdio_release_host(func);
 
-	if (WARN_ON(ret))
-		dev_err(child->parent, "sdio read failed (%d)\n", ret);
+	if (WARN_ON_ONCE(ret))
+		dev_err_once(child->parent, "sdio read failed (%d)\n", ret);
 
 	if (unlikely(dump)) {
 		printk(KERN_DEBUG "wlcore_sdio: READ from 0x%04x\n", addr);
@@ -120,8 +120,8 @@ static int __must_check wl12xx_sdio_raw_write(struct device *child, int addr,
 
 	sdio_release_host(func);
 
-	if (WARN_ON(ret))
-		dev_err(child->parent, "sdio write failed (%d)\n", ret);
+	if (WARN_ON_ONCE(ret))
+		dev_err_once(child->parent, "sdio write failed (%d)\n", ret);
 
 	return ret;
 }
-- 
2.43.0