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@@ -106,6 +106,8 @@ static int wdrtas_set_interval(int interval)
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return result;
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}
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+#define WDRTAS_SP_SPI_LEN 4
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+
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/**
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* wdrtas_get_interval - returns the current watchdog interval
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* @fallback_value: value (in seconds) to use, if the RTAS call fails
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@@ -119,10 +121,17 @@ static int wdrtas_set_interval(int interval)
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static int wdrtas_get_interval(int fallback_value)
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{
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long result;
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- char value[4];
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+ char value[WDRTAS_SP_SPI_LEN];
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+ spin_lock(&rtas_data_buf_lock);
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+ memset(rtas_data_buf, 0, WDRTAS_SP_SPI_LEN);
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result = rtas_call(wdrtas_token_get_sp, 3, 1, NULL,
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- WDRTAS_SP_SPI, (void *)__pa(&value), 4);
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+ WDRTAS_SP_SPI, __pa(rtas_data_buf),
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+ WDRTAS_SP_SPI_LEN);
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+
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+ memcpy(value, rtas_data_buf, WDRTAS_SP_SPI_LEN);
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+ spin_unlock(&rtas_data_buf_lock);
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+
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if (value[0] != 0 || value[1] != 2 || value[3] != 0 || result < 0) {
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printk(KERN_WARNING "wdrtas: could not get sp_spi watchdog "
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"timeout (%li). Continuing\n", result);
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