linux-kernel - [PATCH 5.10 10/83] mmc: sdhci-of-at91: replace while loop with read_poll

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Date:   Mon, 11 Oct 2021 15:45:30 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Claudiu Beznea <claudiu.beznea@...rochip.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Ulf Hansson <ulf.hansson@...aro.org>
Subject: [PATCH 5.10 10/83] mmc: sdhci-of-at91: replace while loop with read_poll_timeout

From: Claudiu Beznea <claudiu.beznea@...rochip.com>

commit 30d4b990ec644e8bd49ef0a2f074fabc0d189e53 upstream.

Replace while loop with read_poll_timeout().

Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
Acked-by: Adrian Hunter <adrian.hunter@...el.com>
Cc: stable@...r.kernel.org
Link: https://lore.kernel.org/r/20210924082851.2132068-3-claudiu.beznea@microchip.com
Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/mmc/host/sdhci-of-at91.c |   16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

--- a/drivers/mmc/host/sdhci-of-at91.c
+++ b/drivers/mmc/host/sdhci-of-at91.c
@@ -62,7 +62,6 @@ static void sdhci_at91_set_force_card_de
 static void sdhci_at91_set_clock(struct sdhci_host *host, unsigned int clock)
 {
 	u16 clk;
-	unsigned long timeout;
 
 	host->mmc->actual_clock = 0;
 
@@ -87,16 +86,11 @@ static void sdhci_at91_set_clock(struct
 	sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
 
 	/* Wait max 20 ms */
-	timeout = 20;
-	while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
-		& SDHCI_CLOCK_INT_STABLE)) {
-		if (timeout == 0) {
-			pr_err("%s: Internal clock never stabilised.\n",
-			       mmc_hostname(host->mmc));
-			return;
-		}
-		timeout--;
-		mdelay(1);
+	if (read_poll_timeout(sdhci_readw, clk, (clk & SDHCI_CLOCK_INT_STABLE),
+			      1000, 20000, false, host, SDHCI_CLOCK_CONTROL)) {
+		pr_err("%s: Internal clock never stabilised.\n",
+		       mmc_hostname(host->mmc));
+		return;
 	}
 
 	clk |= SDHCI_CLOCK_CARD_EN;