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52 lines
1.7 KiB
Diff
52 lines
1.7 KiB
Diff
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From 4a8f7f7661252072494ac16d3edc035193c6ea04 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Mon, 11 Dec 2023 11:20:28 +0000
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Subject: [PATCH 0789/1085] bcm2835-sdhost: Fail gracefully with bad dtb
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The logging timestamps depend on the existence of a bcm2835-system-timer
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node. If this node doesn't exist, leave the logging disabled rather than
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crashing.
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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drivers/mmc/host/bcm2835-sdhost.c | 27 +++++++++++++++------------
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1 file changed, 15 insertions(+), 12 deletions(-)
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--- a/drivers/mmc/host/bcm2835-sdhost.c
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+++ b/drivers/mmc/host/bcm2835-sdhost.c
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@@ -247,19 +247,22 @@ static void log_init(struct device *dev)
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struct device_node *np;
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spin_lock_init(&log_lock);
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- sdhost_log_buf = dma_alloc_coherent(dev, LOG_SIZE, &sdhost_log_addr,
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- GFP_KERNEL);
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- if (sdhost_log_buf) {
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- np = of_find_compatible_node(NULL, NULL,
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- "brcm,bcm2835-system-timer");
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- pr_info("sdhost: log_buf @ %p (%llx)\n",
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- sdhost_log_buf, (u64)sdhost_log_addr);
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- timer_base = of_iomap(np, 0);
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- if (!timer_base)
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- pr_err("sdhost: failed to remap timer\n");
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+
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+ np = of_find_compatible_node(NULL, NULL,
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+ "brcm,bcm2835-system-timer");
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+ timer_base = of_iomap(np, 0);
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+
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+ if (timer_base) {
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+ sdhost_log_buf = dma_alloc_coherent(dev, LOG_SIZE, &sdhost_log_addr,
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+ GFP_KERNEL);
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+ if (sdhost_log_buf)
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+ pr_info("sdhost: log_buf @ %p (%llx)\n",
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+ sdhost_log_buf, (u64)sdhost_log_addr);
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+ else
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+ pr_err("sdhost: failed to allocate log buf\n");
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+ } else {
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+ pr_err("sdhost: failed to remap timer - wrong dtb?\n");
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}
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- else
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- pr_err("sdhost: failed to allocate log buf\n");
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}
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static void log_event_impl(const char *event, u32 param1, u32 param2)
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