mmc: core: limit probe clock frequency to configured f_max (661cf2d8) · Commits · 戴 / test

Currently MMC core disregards host->f_max during card initialization phase. Obey upper boundary for the clock frequency and skip faster speeds when they are above the limit. Signed-off-by:

Michał Mirosław <mirq-linux@rere.qmqm.pl> Link: https://lore.kernel.org/r/f471bceaf237d582d746bd289c4c4f3639cb7b45.1577962382.git.mirq-linux@rere.qmqm.pl Signed-off-by:

Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/core/core.c

+8 −2

Original line number	Diff line number	Diff line
		@@ -2330,7 +2330,13 @@ void mmc_rescan(struct work_struct *work)
		}

		for (i = 0; i < ARRAY_SIZE(freqs); i++) {
		if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min)))
		unsigned int freq = freqs[i];
		if (freq > host->f_max) {
		if (i + 1 < ARRAY_SIZE(freqs))
		continue;
		freq = host->f_max;
		}
		if (!mmc_rescan_try_freq(host, max(freq, host->f_min)))
		break;
		if (freqs[i] <= host->f_min)
		break;
		@@ -2344,7 +2350,7 @@ void mmc_rescan(struct work_struct *work)

		void mmc_start_host(struct mmc_host *host)
		{
		host->f_init = max(freqs[0], host->f_min);
		host->f_init = max(min(freqs[0], host->f_max), host->f_min);
		host->rescan_disable = 0;
		host->ios.power_mode = MMC_POWER_UNDEFINED;

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