Messages in this thread Patch in this message | | | From | Mukesh Ojha <> | Subject | [PATCH] pstore/ram: Rework logic for detecting ramoops reserved memory region | Date | Fri, 25 Jun 2021 16:47:18 +0530 |
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From: "Isaac J. Manjarres" <isaacm@codeaurora.org>
The reserved memory region for ramoops is assumed to be at a fixed and known location when read from the devicetree. This is not desirable in environments where it is preferred for the region to be dynamically allocated at runtime, as opposed to it being fixed at compile time.
Change the logic for detecting the start and size of the ramoops memory region by looking up the reserved memory region instead of using platform_get_resource(), which assumes that the location of the memory is known ahead of time.
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org> Signed-off-by: Mukesh Ojha <mojha@codeaurora.org> --- fs/pstore/ram.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c index fefe3d3..5f90455 100644 --- a/fs/pstore/ram.c +++ b/fs/pstore/ram.c @@ -21,6 +21,7 @@ #include <linux/pstore_ram.h> #include <linux/of.h> #include <linux/of_address.h> +#include <linux/of_reserved_mem.h> #include "internal.h" #define RAMOOPS_KERNMSG_HDR "====" @@ -633,21 +634,21 @@ static int ramoops_parse_dt(struct platform_device *pdev, { struct device_node *of_node = pdev->dev.of_node; struct device_node *parent_node; - struct resource *res; + struct reserved_mem *rmem; u32 value; int ret; dev_dbg(&pdev->dev, "using Device Tree\n"); - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { + rmem = of_reserved_mem_lookup(of_node); + if (!rmem) { dev_err(&pdev->dev, "failed to locate DT /reserved-memory resource\n"); return -EINVAL; } - pdata->mem_size = resource_size(res); - pdata->mem_address = res->start; + pdata->mem_size = rmem->size; + pdata->mem_address = rmem->base; /* * Setting "unbuffered" is deprecated and will be ignored if * "mem_type" is also specified. -- Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project
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