disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/net/ethernet/amazon/ena/ena_com.c
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@@ -35,6 +35,8 @@
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 #define ENA_REGS_ADMIN_INTR_MASK 1
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+#define ENA_MAX_BACKOFF_DELAY_EXP 16U
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+
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 #define ENA_MIN_ADMIN_POLL_US 100
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 #define ENA_MAX_ADMIN_POLL_US 5000
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@@ -522,6 +524,7 @@
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 static void ena_delay_exponential_backoff_us(u32 exp, u32 delay_us)
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 {
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+	exp = min_t(u32, exp, ENA_MAX_BACKOFF_DELAY_EXP);
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 	delay_us = max_t(u32, ENA_MIN_ADMIN_POLL_US, delay_us);
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 	delay_us = min_t(u32, delay_us * (1U << exp), ENA_MAX_ADMIN_POLL_US);
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 	usleep_range(delay_us, 2 * delay_us);