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

Greg Kroah-Hartman
2021-10-11T13:52:29Z

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

commit 30d4b990ec644e8bd49ef0a2f074fabc0d189e53 upstream.

Replace while loop with read_poll_timeout().

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20210924082851.2132068-3-claudiu.beznea@microchip.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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;